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Sturgeon's House

N-L-M

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  1. Funny
  2. Tank You
    N-L-M got a reaction from OnlySlightlyCrazy in Practicality of using ABM against fighters   
    Ok I see it's a two-for-the-price-of-one deal. Have fun on the Carl Sagan forums.
    Another protip for the masses: If your only defenses are "I haven't been banned for it yet" and "it's not illegal", perhaps you should keep that to yourself.
  3. Tank You
    N-L-M got a reaction from Toxn in Competition Suggestions   
    The current direction on discord seems to be a Lone Free State of Texas Rooikat-equivalent, with 1930-1940 tech.
  4. Metal
    N-L-M got a reaction from Sturgeon in Competition Suggestions   
    The current direction on discord seems to be a Lone Free State of Texas Rooikat-equivalent, with 1930-1940 tech.
  5. Tank You
    N-L-M got a reaction from Beer in Czechoslovak interwar bits   
    Canister, or shrapnel if it's a time fuzed shell which ejects the balls after a short flight.
    Also I really appreciate this thread!
     
  6. Metal
    N-L-M reacted to Beer in Czechoslovak interwar bits   
    Possibly last post dedicated to the fortification but a very long one dedicated to the heavy fortifications. I hope that a lot of those peculiar details are new for you. Most of the info comes from very knowledgeable staff of heavy infantry casemate N-S-82. If you ever want to visit some object of Czechoslovak fortification system you must not miss this one because this is the only one fully equipped as it shall have been (in fact it's a bit better equipped than in September 1938 then it was not totally finished inside). All photos are from my phone (it's allowed to take photos inside). 
     
    N-S-82 is a stand alone infantry casemate located in a line on a slope upon the border crossing Náchod-Běloves. It was built in 1938 in a resistance class II. Which means that it had 2,25 m thick frontal wall (with a stones and earth cover). The roof was 2 m thick and the side and rear facing walls were 1 m thick. The border crossing is down bellow while roughly 1,5 km away on the hill there is an artillery fortress Dobrošov. It was guaranteed to withstand 240 mm artillery shells and 250 kg bombs (according to many authors Luftwaffe had no 500 kg bombs fielded at September 1938 yet) however during weapon testing on a casemate Jordán (experimental one used for fortification and weapon development) which had same resistance class even 305 mm heavy mortar hit didn't penetrate the roof (there were volunteers inside during the test fire!). It is said that there was some damage to the equipment but I don't know more details. 
     
    On the same picture you can see also a combined anti-tank/infantry obstacle made of steel U-shape profiles welded together and stuck in a concrete base. Behind them there is anti-infantry barbed wire and a line of steel hedgehogs. Anti-infantry barbed wire could have been placed also in front of those rods. At certain place with high danger of tank attacks concrete anti-tank moats wete built too (sometime they can still be found). 
     
     
    In 1938 you could find also these older concrete hedgehogs in the area. Those were used only earlier because they had two importnat drawbacks. The first one was that they offered better cover for the attacking infantry and the second was that their large area made them easier to move by shockwaves from artilery. 

     
    A historical image showing how such line looked like in the September 1938 (where it was finished). This picture shows a heavy object K-S-35. 

     
    N-S-82 was armed with one 47 mm AT gun, 5 HMG and 5-6 LMG. AT gun with coaxial HMG and a twin HMG were pointing down the valey towards the border crossing. On the opposite side (uphill) there were two single HMGs. LMG were used only in observation cupolas and for close defence of the object (normally the priority was to defend the neighbouring object with primary weapons). 
      
     
    Let's go inside. There are three door covered by 2 LMG fire posts and one fire post for personal weapons directly in the entrance which alone had S-shape to prevent any direct fire into the object and on the main door. The first cage door are 200 kg heavy and on the left side behind them there is a fresh-air intake. On the right side there is armored door 600 kg heavy. Behind another corner there is third presurrized door 450 kg heavy. Both heavy door had emergency hatches in them so that the crew could get out if the door were deformed and stuck. 

     
    The casemate has two floor. The top floor is combat and the bottom one is technical and living one. Every single heavy object had its own water source which must have been able to deliver at least 1,5 litres per minute. In this particular case it was around 4 litres per minute.

     
    This is the electric generator which was pretty noisy. It's in fully working state. It's cooling was used for heating the interior but even in summer the inner temperature didn't get upon 17°C and the soldiers often suffered from respiratory or rheumatic issues. 

     
    This is the filtering and air venting room. On the left side there is the ventilator with back-up handles for manual operation (I tried it myself and it's quite tough). On the right side there are filters which were used only in case of gas attack. The whole object had an overpressure in it which was used also for extracting the fumes from gunnery rooms. 

     
    This particular object had 32 men crew (only the commander was an officer). The soldiers had one bedroom (see bellow). The sub-officers had their own room with own bed for each one and the commander had also his own room but located on the combat floor. Only Czech or Slovak nationals were allowed to serve in the permanent boarder units manning the heavy fortifications (no German, Poles or Hungarians because low loyality was expected with them). 

     
    This is part of the bathroom (it's difficult to take some photos inside because it's quite cramped and I don't want to post gazillion of photos, rather only millions). The lavatories had a water filtration station used to prevent pollution of the main water source and a ventilation preventing methane acumulation). 

     
    Down bellow there was also a food storage, hand granade storage (275 pieces) and a telephone room (on the picture). The bunker had several external telephone lines leading to the neighbouring objects and to the sector command post. As a backup a ground telegraph was used with cable antenas dug underground. Depending on the particular soil composition it was capable of morse communication to the range of 5-10 km. Ground radio antenas for voice communication were not installed by September 1938 (the radio was developed and tested but not fielded). 

     
    Here you can see some internal communication means in the gunnery room. A simple speaking tube and a telephone. 

     
    There was another way how to communicate between the observation cupolas and the gunnery rooms and that was a color code (in case of big noise from bombardning for example). 

     
    With that we got onto the combat floor. This is the LMG firing post for the defence of the rear side. You can see observation insert on the left side which was interchangeable with the LMG. The LMG is vz.26 which I don't need to introduce to you for sure. There were 120 ready-to-fire magazines for each LMG in the object! 

     
    Here is similar firing post with the observation insert mounted and a removable periscope to the right side of it. That was used to observe the close surroundings and the moats at the weapons. Under the periscope there is a tube for hand grenades used for close defence. 

     
    A view inside the observation cupola from bellow. The very peculiar thing here is that the floor worked similarly to the office chair and the soldier could very simply adjust the floor position to his height. The middle column was also used for evacuation of spent cartridges. The cupola is made of 200 mm thick cast steel and the inner diameter is 1,35 m. 

     
    This is a periscoipe which could have been errected through the cupola roof for 360° observation.

     
    A simple lift was used to transport LMG mags to the cupola.

     
    Some more details before we get to the main weaponry. These are JIGs for MG loading. Top is belt-loading JIG for HMG vz.37 and bellow is a one for mag loading of LMG vz.26.

     
    This is the kitchen, gentelmen. Yes, for 32 people! The bunker had food reserves for 14 days but I can hardly imagine to fight 2 weeks inside without getting crazy. 

     
    This is one very peculiar detail. When the bunker was bombarded by heavy weapons the ceiling could elastically deform. To prevent internal much thinner walls from collapsing they had on top of them a cork layer which worked like a spring reducing the pressure on the walls.

     
    Except for the grenades all ammo was stored in the combat department close to the weapons. The capacity of this object was 600 47 mm shells and 600 thousand 7,92x57 rounds. Now imagine that 263 heavy and nearly 10000 light objects were actually built before Münich. What an insane amount of ammo stored in the fortification system!  In reality around 3/4 of the ammo was delivered at 28th September but I would say that it's still huge achievement of the army logistics. On the picture you can see AP and HE-FRAG round of the AT gun (from later war production). A third anti-infantry round was being developed but wasn't fielded. I don't know how it's called in English when the round is filled with steel balls. Can you help me?  

     
    This is the right gunnery room with two single HMG vz.37 and one LMG vz.26 for close defence. Notice that all frontal and side walls and also the ceiling had metalic anti-spall and anti-vibration layer.

     
    All main weapons (AT gun and the HMGs) had sights with 2x zoom (upon the gun there is a drawing of the surroundings). Unfortunately not a single original support for the single HMG was preserved and the plans shall be dug somewhere in the German archives. Therefore these are just approximate replicas. The HMG vz.37 (ZB-53) alone is basically what the Brits know as BESA (rechambered to 0.303). Each single HMG had 2 men crew, the shooter and the loader. 

     
    This is one of only three preserved heavy barrels for the HMG vz.37 in Czechia. This barrel would be used exclusively in fortifications. 

     
    This is a view into the left gunnery room with an AT gun with coaxial HMG and a twin HMG. Both weapons and supports are original. 

     
    Both the HMGs and the AT gun could have been quickly aimed by the body force alone without using elevation and traverse screws (that was also a possibility). The twin HMG vz.37 on the picture had a crew of three (one shooter and two loaders). 

     
    I believe the most interesting thing is the AT gun Škoda vz.36. This particular gun was moved to Atlantic Wall in Norway and in 2002 returned back into N-S-82 and moreover with a spare barrel. There are only around ten of such guns preserved worldwide and very few spare barrels (only one or two in Czechia) and these two have matching serial numbers (173 + 2173; 2173 means second barrel for 173) and moreover they originally belonged to this particular bunker!
     
    The gun was capable of very rapid fire. Normally 20-30 aimed shots per mimute (depending on the skill of the crew) or up to 40 rounds per minute in autofire mode. That meant that it fired automatically once it was loaded (this was possible max. for 3 minutes and after a water cooling up to 6 minutes long was needed). The shooter could fire both the AT gun and the HMG by the same hand and he could use his second hand and his body to aim like with a gigantic rifle in a ball joint without using traverse and elevation screws. The gun had three loaders - two for the AT gun and one for the HMG. The gun penetration values vary in sources I saw but it shall be around 50 mm of cemented steel at 500 meters and 30°, i.e. more than enough for 1938. Later in the war special ammo with claimed double penetration values was developed by Škoda but I don't know if ever used anywhere.  

     
     
    Well, that was N-S-82. Now some more peculiar things from other objects. This is a 15 cm Röchling shell still being stuck in a frontal wall of N-S-91. This object was built in class III therefore the wall on the picture is 2,75 meters thick and if the object was fully completed it would be covered by stones and earth (those would have likely little effect against the Röchling anyway). The wall was not penetrated. Czech fortifications were used for Röchling development just like later also the Belgian ones. However there is an important difference. I believe there is no Röchling hit in the roof in any Czech object while in Belgium the Germans tried the indirect fire and they achieved some very spectacular penetrations. The direct fire used against Czech fortifications was much less effective in terms of penetration but with the indirect fire it was close to impossible to actually hit something. 

     
    I believe that this is another Röchling hit in the wall of N-S-49. Maybe a larger calibre for 21 cm guns, honestly I can't recognize. This is an object of an unfinished artilery fortress Skutina and the wall is 3,5 meters thick. It was too high to actually see inside and the object is not accesible from inside for public but it looked like it's not a penetration. Fun fact about this unfinished fortress. The guys who take care of it plan to connect the underground corridor betwen the existing objects where 27 meters were missing by the time when it was abandoned. 

     
    Last thing is a replica of .380 ACP SMG vz.38 which was never fielded (on display in the object N-S-84). The SMG was basically developed in one month! It had two magazines, straight for 24 and drum for 96 rounds. 3500 pieces were ordered by the fortification command to be used to protect the entry door or in some light objects which were close to each other in difficult terrain instead of the LMG. The SMG was roughly 4x cheaper than the LMG. Only 15 were made before the order was canceled after Münich. Strangely Czechoslovakia which was very successful in small arms development never fielded an SMG in the interwar period. When the army realised it would be good to actually have one it was too late and moreover it had no money for it (at least the cavalery and artilery wanted it). 
     
    Under the SMG You can also see Czechoslovak handgrenades from 1930'. 

     
      
     
     
     
     
     
  7. Metal
    N-L-M reacted to EnsignExpendable in Books About Tanks   
    I like books about tanks so much that I even wrote one myself.
     
    https://www.mortonsbooks.co.uk/product/view/productCode/15014
     

  8. Metal
    N-L-M reacted to Beer in Czechoslovak interwar bits   
    Few photos (from my phone so pardon for the quality). I will add some more later. 
     
    Artilery casemate R-S-79 of Hanička fortress (north-east Czechia). It shall have been armed with three 100 mm rapid firing howitzers which were never installed (plus several MGs and granade tubes). This type of objects was the largest in the whole fortification system. It is made of 5600 tons of reinforced concrete and the walls and roof are up to 3,5 meters thick (same for all object of artilery fortresses). By the late 1938 neiter Wehrmacht nor Luftwaffe had any weapon capable of guaranteed penetration. You can see damage caused by German tests. They achieved some penetrations only when firing salvos point blank from the rearward side. Hanička fortres was used for development of special Röchling bunker-penetrating shells and hand-held cumulative bombs. I am not able to recognize damage potentially caused by them. For sure one Röchling shell is displayed (badly corroded) in the fortress. 

     
    Infantry casemate R-S-78 of fortress Hanička. It was one of the object used to defend the main artilery object. Its main armament was a cupola armed with heavy twin MG (plus several other MGs and grenade tubes). Unfortunately what You see is only an observation cupola (light MG could have been fired from it) not the heavy MG one. As You can see all weapons were installed behind a deep moat with grenade tubes and covered by a thick roof from the top. Generally the heavy Czechoslovak fortresses were similar to the French ones but as I don't know those very well I can't tell you how exactly they differed. In the war the object would have a camouflage coloring and net. 
     
     
    Stand-alone infantry casemate R-S-87 covering a road over a mountain ridge. It's main armament is a 90 mm mortar installed in the moat. Also 47 mm anti-tank gun and two twin heavy MGs and several light MGs. Its walls are up to 1,75 meters thick and it's therefore one of the less resistant heavy objects however it is placed in difficult terrain. The bunker is private and the chimney is of course not original. 

     
    Here would be the mortar.

     
    Twin heavy MG and a light MG on the left side of it. The firing posts are not original as those were removed probably for Atlantic Wall. 

     
    Famous hedgehog and behind it you can see the anti-tank gun in a spherical armoured post.  

     
    47 mm AT gun.

     
    Stand-alone heavy infantry casemate R-S-81 after German tests (with armored firing posts taken to Atlantic Wall I believe). This object was built in the same resistance class as the one upon. Since it is one of the lightests heavy objetcs the results of the artilery tests on the normally inaccessible walls are not very impressive. 

     
    An exampe of anti-infantry obstacles with a light object vz.37 in the background (this time from the southern border with Austria). Where armor attack was expcected the obstacles were made of mixture of concrete moats and steel or older concrete hedgehogs. The firing lines were of course free of trees which was advantage and disadvantage in the same time. Large majority of Czech border areas is hills, mountains and forests. That made it much more difficult for attackers but on the other hand the free of trees firing lines were clearly visible from the air.  

     
    This is how the pillbox looks from the side of the enemy. Even these light pillboxes had walls up to 80 cm (120 cm for less common but still widely used reinforced variant). Together with stones and earth on the front side they are claimed to be capable to withstand 88 mm Flak fire (per German tests) or 105 mm howitzer hits (150 mm for the reinforced variant). The crew of max. seven men (depending on the type) had light MGs, grenade tubes and personal weapons. 

     
    Detail of the firing post for the vz.26 light MG (sometimes also old heavy MG vz.24 was used I think - the MG vz.24 was rechambered Schwarzlose for 8 mm Mauser ammo). You can see how the firing post is covered by the  shielding wall from the fire coming from the enemy. These pillboxes covered basically all enemy borders (except extremely difficult terrain where only field fortifications weere used) and usually in several lines. Nearly 10000 of them were finished. Unlike in France there was nowhere to pass around. At the end of the war there was a skirmish between Wehrmacht and US army where German soldiers tried to use these pillboxes. They could however use them basically only as a shelter because at that time the fans were removed and when someone fired from inside the pillbox was immediately full of exhaust gasses. 

     
    Pillbox vz.37 from the rear (friendly) side. The biggest problem of these bunkers was absence of any anti-tank weapons but by the time of Münich no fielded German tank had more than 14,5 armour and even the MGs could be dangerous for them since the gaps between the bunkers were usually short. Of course AT guns could and would be used in field positions to support the lines of bunkers. Another issue was with the ammo. It was simply not possible to store much ammo inside therefore the bunkers needed ammo supplies (unlike large fortresses with underground warehouses and even own water wells). 

     
    Part of the pillboxes on the iron curtain were in use by the army till 1990' and are therefore in good condition. They have however often different firing posts (for UK vz.59) and often more stone and earth cover (officially to prevent overturning them by nuclear explosion). Normally the pillbox has some 2 meters of concrete undeground. 

     
     
     
     
     
     
  9. Metal
    N-L-M reacted to Beer in Czechoslovak interwar bits   
    Hello guys,
    I think that possibly some of you might be interested in our interwar Czechoslovak stuff. For starter I've decided to share with you a wonderful online document about our fortification system. At the very beginning I'd like to say that I have nothing common with its creators. It's just an incredible gem that deserves to be shared with you. If you know it, sorry for that, nevertheless I think most of you don't. Since I am new here I will not waste your time debating what if scenarios. Don't worry.  
     
    Well, enough of talking. What I want to share with you is a massive interactive map of our fortification system containing nearly 11 thousand objects with information about every single one of them. You can switch on even such crazy details like cable networks or construction facilities used for building of the fortifications. The map is directly linked with an online database of the fortification buildings where more than 2000 objects are listed with detailed description (plans, 3D models, photos, weapons, crew, important dates, recent state etc.). Unfortunately this database is only in Czech language but it can be a great source of information for you anyway (especially when linked with the map). The good thing is that the map alone supports other languages and you can easily switch them.  
     
    This is the base view where I have already switched on all objects. You can change background map type, information etc. on the left side and visualise everything what You want to see on the right side. 
     
    Let's zoom in a little bit. Here You can see one of the strongest fortified places - a valey at Králíky in north-east Czechia. As you can see the object marks have different shapes, colours etc. The shape is matching the menu on the right side. Triangles are concrete pillboxes vz. (mark) 36. Small circles are pillboxes vz. 37. The letter inside means type of the object (with one firing post, two on each side, angled one etc.). The color can be decoded from the information table in the bottom right corner. Basically it shows whether the object was actually built, if it was later destroyed or the works were only started or even not so. The heavy objects are the large circles. The numbers have also a meaning. It's a resistance class (1 -> 2 -> I -> IV from the lowest to the most resistant). 

     
    You can switch on also the ground plans of the artilery groups (fortresses with underground network between the casemates). You can see it here (fortress Hůrka). 

     
    You can also switch on the firing lines. Here You can see heavy artilery coverage of the most fortified section of the line (the sad thing is that no heavy artilery pieces were installed by the time of Münich crisis - but lets leave such details aside for now). 

     
    You can switch on the firing lines even for the pillboxes as you can see here on the example from the souther border. Nearly all Czechoslovak objects were built for side fire having superheavy resistance frontal walls with stone and earth covers. 

     
    If You zoom even more and switch for satelite map you get something like this. In this case the red color shows anti tank 47 mm guns and the blue color is 7,92 mm (sometimes double) heavy machine guns of a heavy separated casemate (possible use of light machine guns in observation cupolas is not marked). The grey color shows vz.26 light machine guns of the neighbouring pillbox. 

     
    You can click on every single object and you get available details. The first icon shows detailed lines of fire including realistic range. Bellow the L: L1 M ZN 3-4 means: Left side: L1 = 47 mm anti tank gun with 7,92 mm coaxial heavy MG; M = twin 7,92 heavy MG; ZN is I think type of the cupola but I'm not actually sure about it. The codes for the weapons are shown at the table in the lower right corner (you need to keep the cursor on the question mark). 

     
    The Second icon leads to a database of objects which is unfortunately only in our weird language. Anyway you can dig a lot of information from it as well (drawings, recent state, photos, exact location etc.).

     
     
    The best thing is that most of the objects still exist till today (all of those heavy ones). The Germans managed to destroy roughly 2000 light objects (and gain some 11000 tons of steels from them). They managed to damage also many heavy ones when they were testing weapons and tactics for the future use duirng the WW2. They even moved some cupolas (and of course the famous hedgehogs) to other fortifications along the Atlantic wall or elsewhere. Many of them are made into better or worse museums today (large quantity is private now). Huge number of them is just left alone and freely accessible for anyone. If you are more interested I can give you tips which ones to visit. On the Czech map portal You can use a mode panorama which is basically the same thing as Google street view but it's much more up to date and it's nearly everywhere where they got at least with a motorbike. Since the fortifications are also visible there, you check where they are for easier access. 
     


     
    If you are interested I can continue the fortification topic with some other information (I'm no historian but I have visited quite many of the objects myself and read some books about them). 
     
    OK, so this was my first post on the forum. I hope you find it interesting and maybe for some of you it can be a reason for a trip, who knows :-) 
     
     
     
     
  10. Funny
    N-L-M reacted to Bronezhilet in Your Tank Stories   
    Alright, I forgot about this.
     
    I have a whole bunch of stories from the time my dad was in the army, for a reunion they made a little book with all sorts of stories from their time as hussars. I'll try to make a nice story from a bunch of them.
     
    Over there in the Netherlands we don't have those massive training areas like they have in the US or Germany, we have to make do with smaller ranges or have areas where we can't fire weapons. The only area where tanks can fire their guns is on a range called "Vliehors", which is on one of our islands. Every once in a while they go there for training, and of course, there has to be a first time for everything. Now, back in those days (1966-67) we had conscription, and conscripts were just assigned a role and had to make do. This did not always turn out well.
     
    So, the newly conscripted tankers arrive at the Vliehors for their first life fire shots. They line their Centurions up at the firing range, the commanders give their orders and the Cents point their barrels straight at and old tank used as a target.
     
    Except one.
     
    When the signal is given, all tanks fire, including the one aiming up. And of course he immediately gets the nicely asked question of "WHAT IN THE FUCK ARE YOU DOING YOU FUCKING MORONS!?".
     
    Turns out the gunner heard "Target, brisance, 1800 meters" instead of "Target, armour, 1800 meters", so he aimed like he had an HE shell loaded (and seeing how it's written, he aimed poorly too). So basically he fired an AP shell at angles only used for long range artillery support. They never really figured out where that AP shell went. Probably somewhere in the sea.
     
    And that's why we don't have more firing ranges! And it's also why that gunner immediately was a loader after that.
     
     
    Anyway, during a later training...
     
    My dad, as a fresh Hussar got the task of cleaning the gun of another Centurion. Of course, you can't have a live firing session with a dirty gun, now can you?
    He 'happily' went on cleaning the gun, replacing oils, whatever you need to do to clean a tank gun. When he was done the tank was sent on his merry way to the firing range.
    Seconds after firing a voice thundered over the range "HUSSAR BRONEEEEEEEEEEEEEEEEEEEEEEEEEEZ!!". To which my dad replied "Sir, I'll immediately get the end-caps of the recoil cylinders and get to cleaning, sir!".
     
    I guess you can imagine how the inside of a tank looks when you forget to put the caps back on the recoil system of a tank gun, and fire it.
  11. Tank You
    N-L-M reacted to Scolopax in Tanks of the Commonwealth in WWII thread   
    Churchill NA 75 conversion using Sherman gun and mantlet to correct the deficiencies in the Churchill Mk IV's armament and frontal turret protection. 
     

     

     

     

     

     

     
  12. Funny
    N-L-M reacted to David Moyes in Britons are in trouble   
    Warrior hulls are too worn-out for upgrade so now the plan is to make entirely new ones.
  13. Metal
    N-L-M reacted to Xoon in Californium 2250- final submissions   
    Nordic Feminist Design Division presents: P2055 “Gaupen”

     
     

     
     

     
     

     
     
     
    Table of basic statistics:
    Parameter
    Value
    Mass, combat
      65 metric ton
    Length, combat (transport)
      7050mm
    Width, combat (transport)
      3877mm
    Height, combat (transport)
      2000mm
    Ground Pressure, MMP (nominal)
      297Kn/m2
    Estimated Speed
      60Kp/h
    Estimated range
      400Km
    Crew, number (roles)
      2 (Commander, Gunner/Driver)
    Main armament, caliber (ammo count ready/stowed)
      200mm L40 gun. (40 rounds, 15 in first autoloader).
    Secondary armament, caliber (ammo count ready/stowed)
      7,62mm GPM (1200 rounds).
     
    12,7mm HMG (500 rounds)
     
    Vehicle designer’s notes:
    The P2250 was designed to be as heavily armored as possible, with the smallest weight and profile.  We tried to make use of the new experimental technologies and developed our own hydrostatic transmission and hydropneumatic suspension. This allowed much greater low speed mobility and some interesting arrangements. With the cannon mounted to the chassis, the autoloader became simplified and allowed a higher theoretical rate of fire and a reduction of crew to only 2. 

    Mobility:
    1. Link to Appendix 1- Not realized because of lack of weight value. 
     
    2. Engine - Kharkov 5TD (increased to 6 cylinder), 16L, 800HP, water cooled, constant speed.
     
    3. Transmission - Hydrostatic, 1 Forward, 1 Neutral and 1 Reverse, engine forward; motor and controls in the rear, is a continuously variable transmission, allow the engine to run at a constant speed with instant torque. It features hydraulic breaking and locking on top of normal friction breaks, also has a minor regenerative capabilities.
    Appendix

    Location of drive train components and their connections:

     
     
    4.Fuel - Diesel, 1000L, sponsons, 400km, was planning to add optional fuel barrels for increased range, but scrapped because of time limit. 
     
    5. Powerpack is set up as an open circuit hydraulic system, allowing it to power auxiliary equipment and other subsystems like the auto loader and suspension, or power tools.
    Appendix
     
    6. Suspension- Hydropneumatic (Nitrogen), 500mm suspension travel, 500mm ground clearance. The suspension is a fully adjustable in arm suspension using a slider crank design. Each arm has a built in shock absorber and can be either electronically or manually adjusted. Each unit has an overpressure valve to limit damage to the unit during very rough travel. Each unit is a bolt on unit, making replacements easy and fast.
    Appendix
     
    View of the suspension:


     
     
     
     
    Survivability:


     
    Red: Ammunition and cannon.
    Blue: Composite armor.
    Grey: Drive line components.
    Green: Fuel. 
    Brown: Crew. 
     
     
    1.     Link to Appendix 1 - Not realized. 
     
    2.     Link to Appendix 2- Not Realized,  has a 1000mm deep armor cavity at 1,79m^3 at the front, with a 900mm deep armor cavity at 180mm height on each sponsons. 
     
    3. Non-specified survivability features and other neat tricks-
    Very low profile vehicle with the ability to further reduce its profile by lowering its suspension. Very low profile while in hull down position.
    Has blow off panels, light panels that are screwed in place to break off when ammunition ignites.   Fuel is used as side armor. 
     
    Firepower:
     
    A.    Weapons:
     
    1.     Link to Appendix 1- Not realized.
     
    2.     Main Weapon-
     
    a.      Smoothbore cannon (510 MPa working pressure). 
     
    b.      200mm caliber. 
     
    c.      Ammunition:
             Common: 200 x 900 mm brass case, estimated 50kg. 
             HEAT: Not realized. 
             HE: Not relied. 
             AP: Not realized. 
       
     
    d.     Ammo stowage arrangement- 15 rounds stored in primary shell conveyor, 25 rounds stored in secondary shell conveyor.  Entire system has blow off panels above it. The system is powered by the tanks hydraulic circuit. 
     
     
    B.    Optics:
     
    1.     Primary gunsight- two axis stabilized gunners sight.
     
    2.     Drivers 3 vison telescopes. Commander features 360 degree coverage form the copula with a 4x sight connected to the RCWS. 
     
    C.    FCS:
     
    1.     FCS- Gun is rigidly mounted to the chassis. The gunner can select a firing mode to put the vehicle into precision mode.  Tracks turn to traverse the cannon, and the suspension adjusts to elevate to depress the gun. The gunners controls feeds into the suspensions control system, modifying the pressure in each individual suspension unit to accomplish the right elevation/depression. A gyroscope keeps track of the vehicles tilt and adjusts accordingly.  
    The commanders station has duplicated controls and features a fully rotatable commanders copula with a range finder and 12,7mm remote operated HMG. The commander can measure the range and move the tank accordingly, giving a sort of hunter-killer system. 
     
    2.     Link to Appendix 3- May be added in the future. 
     
    Fightability:
     
    1.     Ease of service and maintenance on the suspension units.
    2.     Low maintenance transmission, hydraulic motors do not require a lot of maintenance.
    3.     Reduced brake wear because of hydraulic parking break and minor regenerative breaking. 
    4.     Reduced engine wear from running on a stable RPM. 
    5.     It has a 200mm cannon. 
    6.     Has a remote controlled weapons station, allowing the commander to avoid peaking his head out when firing on infantry.
     
    Free expression zone:
    The Nordic Feminist Design Division felt that there was a sever lack of special needs armored fighting vehicles which strives against our glories republics values. 
    The team set out to make the most inclusive vehicle possible. The turret was quickly removed as it was seen as offensive to the crippled, gifted people of our republic.  Next was the issue with the height. The tank was too high to climb aboard for midgets little people, so a adjustable suspension was installed to allow the tank to lower itself. It was also of the highest importance that even our machines would bow to our Serene Highness. 
    The gun was requested to be of at least 200mm caliber, which our lead engineer said was outrageous (our lead engineer has been REDACTED, and has been replaced by a more suiting, and diverse individual).  Our lead engineer agreed and work began to install the gun. Our female engineers noted that the ammunition was too heavy to be loaded manually for a woman, and was deemed discriminatory, so a autoloader was developed to accommodate the superior gender. 
     
    As of currently our team failed to meet the deadline and has been REDACTED. 
    Our team has been sent on a holiday in the North to sunbath in the north. 
     

     
    A picture of our team of engineers going to work. 
     
     
    All Hail Serene Highness.
     
     
     
    (I will try to add the schematics tomorrow for the suspension and transmission, but it is 01:30 here, and I am taking the bus to work at 06:00. )
  14. Funny
    N-L-M reacted to Whatismoo in Californium 2250- final submissions   
    FINAL SUBMISSION:
     
    AFV-50 — T-52
    (Object 138)
    A Product of SierraNevadaVagonzavod

    Chief Designer
    Whatismoo
     
    Aeronautical Engineering, Drafting, Armor, and Hypervelocity Threat Projectile Testing Objects (HTPTO)
    A. T. Mahan
     
    Advanced Technology Bureau, Ramjet Propulsion Development
    Hephaestus Aetnaean
     
    Digital Computing and Hypersonics, Computational Armor Optimization:
    CKFinite
     
    Advanced Design Bureau
    Flapjack
    OnlySlightlyCrazy
     
    Space Operations
    Crazy
     
     
    Table of basic statistics:
     
    Parameter
     
    Value
     
    Mass, combat
     
    49 365kg (W/ERA, 47 982 W/O ERA)
     
    Length, combat (transport)
     
    9.950m
     
    Width, combat (transport)
     
    Width, with ERA: 4.251m
    Width, no ERA: 4.0m
    Width over tracks: 3.86m
    Height, combat (transport)
     
    2.41m
     
    Ground Pressure, MMP (nominal)
     
    231.1 kPa (88.4 kPa)
     
    Estimated Speed
     
    >75kph (25-33hp/ton)
     
    Estimated range
     
    460km on internal fuel, 720km with additional external drums
     
    Crew, number (roles)
     
    3 (Commander, Gunner, Driver-Mechanic)
     
    Main armament, caliber (ammo count ready/stowed)
     
    125mm Smoothbore Gun 2A35 (30 Ready, 45 Total)
     
    Secondary armament, caliber (ammo count ready/stowed)
     
    Coaxial 7.62mm PKT (2000 ready, 4000 total)
    Commander's KPVT (100 ready, 500 stowed)
     
     
     
    Vehicle designer’s notes: As chief designer of the 2250 Heavy Tank program at SNVZ, we had spent quite some time theorizing about ways to remedy the, frankly, superiority of the Cascadian "Norman" Medium Tank over current Californian vehicles. Our design needed to not only meet the Norman, but exceed it, by enough to ensure that no simple upgrades of the Cascadian design could undermine the qualitative advantage our design held. Where the Norman is, in many ways, a radically re-designed and improved T-55, SNVZ decided to take a similar approach with the far superior T-72. The result is a robust, light weight, technologically advanced, and astoundingly lethal vehicle which can be comfortably operated in all environments which it could expect to face, from the heat of the Mojave to the alpine chill of the Sierra Nevadas.
     
    Vehicle feature list:
    Mobility:
     
    1.    APPENDIX 1: https://mega.nz/#!IQhH3YJA!kXnIfS2rWaeVaA1hM8ouQwpfTQ08K4qW3jNOIY8a_Ig
     
    2.     Engine- EVDS-2230-2 V-12, 2,230 cubic inch, 1,562hp, water cooled, FADEC, electronically controlled fuel injection, and twincharged.
     
    3.     Transmission- CD-1750 crossdrive-type eight-speed manual gearbox, mounted in VPK-3B powerpack, able to handle much greater power.
     
    4.     Fuel- Type, Automotive diesel, 1,200L + 416L stowed in the hull and in auxiliary quick-detach barrels at the rear hull, 460km internal/720km with aux tanks, auxiliary tanks can be jettisoned remotely from driver or commander's position.
     
    5.    Under-armor APU (52hp, 15kW), mechanical cooling system for driver-mechanic.
     
    6.     Suspension- Torsion-bar, +325mm/-125mm travel, 490mm ground clearance, rotary-type shock absorbers on all arms, modularized easily-replacable design.
     
    Survivability:
     
    1.     Link to Appendix 1 - https://mega.nz/#!IQhH3YJA!kXnIfS2rWaeVaA1hM8ouQwpfTQ08K4qW3jNOIY8a_Ig
     
     
    2.     Link to Appendix 2- armor array details: https://mega.nz/#!IRhBUaDS!6a01a-Z6tpCzOeqzdGqxoo9poVTBN4RQ-nMIRHVabQU
     
    3.     [In Spoiler Box]
     
    Firepower:
     
    A.    Weapons:
     
    1.     Link to Appendix 1- https://mega.nz/#!IQhH3YJA!kXnIfS2rWaeVaA1hM8ouQwpfTQ08K4qW3jNOIY8a_Ig
     
    2.     Main Weapon- 2A35 (image in spoiler tag)
     
    a.     Type: Smooth Bore Tank Gun
     
    b.      Caliber: 125mm L/48
     
    c.      Ammunition types and performance (short)
    3BR1 APCBC-FS [Modified BR-472 projectile at 1,245m/s] 3OF1 HE-FS [950m/s] 3OF2 DEMO-FS [It’s a oversize HE round to replace the venerable 152mm assault gun in urban combat] 3BK1 Tandem-charge HEAT [55/115mm HEAT, 915m/s] 3BK2 Triplex-charge HEAT [85/115/115 HEAT, 915m/s] 3UBM3 AP-SFRJ: See Appendix 3 for details 3BM2 Hypervelocity Threat Projectile Testing Object: (750x50mm rod at 1,580m/s) 3BM3 Hypervelocity Threat Projectile Testing Object: (850x36.4mm segmented rod at 2,000m/s)  
    d.     Ammo stowage arrangement

    The AL-type carousel-pattern automatic loader is capable of handling cartridges of 950mm overall length (technically 975 is the physical limit, but it is believed that a 950mm cartridge overall length limit allows significant room for growth while leaving some clearance inside the autoloader). It services the gun in circa 6 seconds, providing a reliable 10-round-per-minute rate of fire. It is fed by a 30-round carousel, with the cartridges arranged vertically around the turret ring. Reloading the autoloader carousel is conducted by the crew, and most of the shells are a single-person lift. Some of the more exotic types, including but not limited to 3BR1, 3BK2, 3OF1, 3OF3, and 3UBM3 are shipped separately as two pieces, and assembled during loading into the autoloader carousel due to the high projectile weight.
     
    The vehicle is provided with two hull ammunition racks flanking the driver, which are not able to be loaded from in combat and are NOT capable of storing 3BK2, 3OF3, or 3UBM3. The autoloader separates the turret basket from the hull with a steel splinter-protective bulkhead of 5mm thickness and the driver is unable to maneuver those sorts of ammunition through the loading hatch. Total ammunition stowage for the main gun is 45 rounds, 30 in the autoloader and 15 in the hull storage racks.
     
    e.      FCS- relevant systems, relevant sights for operating the weapon and so on. 
     
    f.      Neat features. -- See Above
     
    3.     Secondary weapons- 
    Coaxial PKT:
    Feeding from left to right with a disintegrating link belt. Mounted in the Mk.18 mount, and provided with 4000 rounds ammunition, of which 2000 is ready. Integrated into the main gun FCS.
     
     
     
     
    Commander's KPVT:

     
     
    The commander is provided with a 14.5x114mm KPVT heavy machine gun mounted to the cupola, with a sighting and control system for use while under armor. This is provided with 100 rounds of linked ready ammunition, and a further 400 rounds stowed in the turret basket in ammunition cans, with provision made to stow extra ammunition cans to the turret roof for quick reloads. The commander’s KPV can also be used as a manually operated anti-aircraft gun. It was chosen to provide a range overmatch against Mormon forces, as the 14.5x114mm cartridge possesses nearly twice the muzzle energy of the 12.7x99mm round, and has commensurately better long range performance. The Commander’s machine gun is provided with a 1-8x variable power periscopic optical system for use under armor, and back-up iron sights. Control is through electric motors and geared drive, and the gun can be slaved to the sight. It provides light vehicle and anti-infantry capability to 3,000m. The mount is fully stabilized and is able to be used effectively while on the move, and incorporates F50 NGVII image intensifying tubes
     
     
    4.     Link to Appendix 3- Weapon system magic. (Also APS system and Semiconductor production) https://mega.nz/#!EBRiRQ6Q!5wYPI0yDpF_8qGgA5KHUR1cHtbtmdFy8nxn5XOECdHc
     
    B.    Optics:
     
    1.     Primary gunsight
    The TPD-2-49 stereoscopic rangefinding sight assembly is a fully stabilized rangefinder and gunsight with day / night capabilities. Day sighting is provided by two sights, a high field of view periscopic unity sight and a 3 to 12 power variable magnification periscopic sight with illuminated reticle. Night sighting is provided by F50 image intensifying tubes mounted in both the periscopic portion of the sight assembly and in the rangefinder. (F50 is part of the Night Vision Generation II image intensifier program discussed in Appendix 3, Part D: Electro-optical Program Night Vision Generation II.) Provision is made for the replacement or augmentation of the image intensifying system with a thermal imaging system when such a system is ready. The sight is arranged so that replacement of the stereoscopic rangefinder with a laser rangefinder system is possible.
    Range information from the TPD-2-49 is automatically transmitted to the 7M13 FCS and is included in the gun-follows-sight control scheme: the ballistic solution is continuously updated by the 5E1 and the gun aimed as the range is dialed in. As a result, firing can take place immediately after the correct range is found.
     
    2.     
    The commander’s hunter-killer cupola with TDD-3 optical complex is provided with a 1-8x variable power periscopic optical system for use under armor. Control is through electric motors and geared drive, and the 125mm gun can be slaved to the sight (commander's override). In combination with the 14.5mm KPVT machine gun, TDD-3 provides light vehicle and anti-infantry capability to 3,000m, as well as hunter-killer and slew-to-cue capabilities. The mount is fully stabilized and is able to be used effectively while on the move, and incorporates F50 NGVII image intensifying tubes for night operations.
     
    C.    FCS:
     
    1.     List of component systems, their purpose and the basic system architecture.
    TPD-2-49 244cm coincidence rangefinder-sight (GCRS) complex TDD-3 Commander’s Independent Rangefinder-Sight (CIRS) complex 7M13 Electronic Fire Control System 5E1 Turret/Weapon Management Computer (TWMC) 2.     Link to Appendix 3- weapon system magic, if you have long explanations about the workings of the system. https://mega.nz/#!EBRiRQ6Q!5wYPI0yDpF_8qGgA5KHUR1cHtbtmdFy8nxn5XOECdHc
     
    Fightability:
     
    1.     List vehicle features which improve its fightability and useability.
    Low Crew Requirements Turret armor defeats >BGM-1 60/160 CE and ≥500mm KE to 161.5° of turret traverse High Degree of Automation Improved battlefield accuracy and see-shoot time through digital FCS Autoloader allows true Fire / Load on the move capability Excellent night-fighting capacity through the provision of Gen-III Equivalent I2 tubes, both in the vehicle and for personnel. Digital systems improve maintenance and wear tracking, allow better supply chain management Power-Pack enables fast maintenance Turret modular armor package design eases growth / upgrades and battle damage repair Semiconductor advances allow rapid development of advanced computing systems Guided KE ramjet round lethal at extended ranges, quite accurate, short flight time Light weight eases infrastructure wear from training maneuvers, increases strategic/operational mobility Small silhouette - Turret exposes same frontal area turned up to 40 degrees off centerline Advanced armor suite and crew Force-Multiplication measures (hard-shell crew helmet, dual-tube night vision devices) Advanced digital radio encryption for safe battlefield communications Text-Messaging through the radio system extends communication range where voice TX is unintelligible Additional Features:
     
    Feel free to list more features as you see fit, in more categories.
    Crew Comfort
    Upgradeability
     
     
     
     
     
     
     
    Free expression zone: Let out your inner Thetan to fully impress the world with the fruit of your labor. Kindly spoiler this section if it’s very long.
     

    SNVZ design and pre-production staff, including comrade-academicians, comrade-engineers, and comrade-military-technical-advisors. Photo by Comrade Political-Moral Officer Lt. Col Allin Smythee-Redacted, PAFDPMR
     
     
  15. Funny
    N-L-M reacted to Toxn in Californium 2250- final submissions   
    Hakika si Kundi la Dudes Nyeupe (HKDN) Submission: Object 426 "Stumpy"




     
    Table of basic statistics:
     
    Parameter
    Value
     
    Mass, combat
     
    54.8 mt
     
    Length, combat (transport)
     
    6.2 m/9.7 m (gun forwards)
     
    Width, combat (transport)
     
    3.8 m
     
    Height, combat (transport)
     
    2.6 m (to top of commander's hatch)
     
    Ground Pressure, MMP (nominal)
     
    114 N/m2
     
    Estimated Speed
     
    60 km/h on road, 40 km/h off-road
     
    Estimated range
     
    400 km
     
    Crew, number (roles)
     
    4 (commander, driver, loader, gunner)
     
    Main armament, caliber (ammo count ready/stowed)
     
    85 mm L/70 high-pressure gun (30 rounds in protected rack under blow-off panels in turret rear, 5 rounds in ready/emergency racks in fighting compartment)
    Secondary armament, caliber (ammo count ready/stowed)
     
    7.62 mm coaxial machinegun (1200 rounds)
     
    12.5 mm machinegun (1200 rounds)
     
    250 mm Large Universal Body (LUB) missiles (4 in armoured boxes on turret sides)
     
    Vehicle designer’s notes:
     
    HKDN's object 426 (provisional designation "Stumpy", provisional identifier "Xer") is intended to provide mobility, protection and firepower which meets or exceeds requirements at a low weight. It uses proven track, suspension, engine and transmission components, and combines them with innovations in firepower and protection to produce a superior fighting vehicle capable of taking on all comers. 
     
    Vehicle feature list:
     
    Mobility:
     
    1.     Link to Appendix 1- RFP spreadsheet, coloured to reflect achieved performance.
     
    2.     Engine- 2x V-10 diesel (based on V-46-6 engine), 32.3 l displacement each, 650HP each, liquid cooled, coolant piped through armoured conduit to radiators in rear.
     
    3.     Transmission- planetary, synchromesh, hydraulically assisted (based on T-72), 7 forward gears and 1 reverse gear; engine forward; transmission to rear.
     
    4.     Fuel- diesel, 1350 l total capacity, stowage in forward hull and fighting compartment floor, 400 km estimated range, acts as additional armour against frontal attacks and mine blasts.
     
    5.     Engine bay is designed so that individual engines can be lifted out as power pack units. Transmission and engines are set up so that the tank can run even if one engine is disabled .
     
    6.     Suspension- torsion bar with hydraulic shock absorbers, 20-32 cm travel, 50 cm ground clearance, based on proven design of T-72.
     
    Survivability:
     

    Layout of armour and protective components:
    Dark red - mantlet
    Red - frontal arrays
    Orange - turret side arrays
    Gold - driver's side array
    Yellow - fighting compartment side arrays
    Green - roof array
    Black - fuel
    Grey - Automotive components: engines, drive shaft, transmission, radiators
    Not shown - 25 mm HHA side skirts, 45mm base armour, turret basket, armoured ammunition stowage, armoured boxes for LUB missiles
     
    1.     Link to Appendix 1 - RFP spreadsheet, colored to reflect achieved performance.
     
    2.     Link to Appendix 2- armor array details.
     
    3.     Non-specified survivability features and other neat tricks - smoke grenades, use of fuel cells and radiators as armour, rear radiator housings double as large    escape hatches for crew.
     
    Firepower:
     
    A.    Weapons:
     
    1.     Link to Appendix 1- RFP spreadsheet, colored to reflect achieved performance.
     
    2.     Main Weapon-
     
    a.      Smoothbore cannon (510 MPa working pressure)
     
    b.      85mm calibre
     
    c.    Ammunition -
           Common: 75 x 500 mm composite case (158 mm at base), combustible case wall and steel case stub, 19-21 kg total round weight.
           APHE-FS: 11.4 kg, 1000 m/s, 250 mm RHA penetration at 500 m, 210 mm RHA penetration at 2000 m.
           APCR-FS: 3.2 kg, 1900 m/s, 330 mm RHA penetration at muzzle.
           HEAT-FS (steel liner): 11.4 kg, 1000 m/s, 200 mm RHA penetration.
           HEAT-FS (precision-formed copper liner, precision-formed explosive, wave shaper, improved fuse assembly): 11.4 kg, 1000 m/s, 350 mm  RHA penetration.
           HE-FS: 11.4 kg, 1000 m/s, ~15 mm RHA penetration
     
    d.    Ammo stowage arrangement- 30 rounds in 3 linear racks in turret rear. Racks are behind armour and under blow-off panels. 5 rounds in emergency/ready racks scattered around fighting compartment. Racks are motorised to bring rounds forwards to front of rack. Loader accesses rack using motorised door.
     
    e.   FCS- gun is electro-hydraulically stabilized in 2 axes (based on T-72). Maximum gun elevation/depression is +20/-5 degrees.
     
    f.    The high-pressure 85mm gun allows rapid-fire engagement of multiple targets thanks to its high velocity and lightweight ammunition. Penetration is sufficient to deal with most threats at combat ranges, with high-priority targets being engaged by LUB missiles. A standardised muzzle velocity simplifies aiming when switching ammunition types. The APCR-FS uses an aluminium body, 28x420mm maraging steel core and 13x51mm tungsten alloy tip to provide a high-penetration kinetic round for close-in combat (0-500m). 
     
    3.     Secondary weapons-
     
                a.    7.62 mm coaxial machinegun, 1200 rounds
     
                b.    12.5 mm machinegun, 1200 rounds, mounted in rotatable pintle on commander's hatch.
     
                c.     4 x 250 mm LUB missiles (described further in Appendix 3)
     
    4.    Link to Appendix 3 - Weapon system magic. This is where you explain how all the special tricks related to the armament that aren’t obviously available using Soviet 1961 tech work, and expand to your heart’s content on extimated performance and how these estimates were reached.
     
    B.    Optics:
     
    1.     Primary gunsight - stabilized gunner's sight in turret roof. Stabilization is 2-axis, with gun calibrated to sight (described further in Appendix 3)
     
    2.    Secondary optics -
          Secondary telescopic mounted coaxial to gun.
          Observation periscopes for commander and loader. Commander's periscope is stabilized.
          Vision blocks in commander's hatch.
     
    C.    FCS:
     
    1.    Main gun fire control is fairly conventional aside from sight-slaving system. Missile fire control is via main or secondary gun sight, with radar/optical  aiming system mounted coaxial to gun.
     
    2.    Link to Appendix 3 -weapon system magic
     
    Fightability:
     
    1.     Large commander's and loader's hatches improve ingress/egress. Rear hatches allow rapid evacuation and assist in reloading vehicle.
    2.     Small size and weight of vehicle increases strategic mobility. Low ground pressure and high power-to-weight ration increases tactical mobility.
    3.     Larger number of crewmen and design of engine bays improves serviceability of vehicle.
    4.     Smaller main gun increases number of rounds which can be stowed, eases ammunition handling.
    5.     LUB missiles provide one-hit-one-kill capability against any and all likely targets. The large, modular design of the missile body allows it to be upgraded over the life of the vehicle.   
    6.     The use of known automotive, suspension, gun and optical components based on the venerable T-72 design eases development time and increases reliability.
     
    Additonal Features:
     
    Additional and optional features are detailed further in Appendix 3. These include a smaller-diameter missile to replace the LUB missile, a 145mm low-pressure gun to replace the 85mm gun, a commander's stereoscopic rangefinder and an addon ERA package.
     

     
    Free expression zone:
     
    "As leaves gently fall
    so too will Cascadia,
    thanks to our big stick."
    - dedication by the design team of HKDN to Object 426 project
     

    HKDN senior design team engineers on Object 426 project. Left to right: Chadina Blake-Smythe, Sora Jina-Bandia and Ukelele Brown-Davis.
  16. Tank You
    N-L-M got a reaction from Toxn in Competition: Californium 2250   
    Yes. Off the centerline = measured from the centerline = arc is in total double this angle.
  17. Tank You
    N-L-M got a reaction from Toxn in Competition: Californium 2250   
    Tread is the distance between the *centers* of the tracks, ie how far apart their centerlines are.
  18. Tank You
    N-L-M got a reaction from Lord_James in Californium 2250- final submissions   
    ATTENTION DUELISTS:
    @Toxn
    @LostCosmonaut
    @Lord_James
    @DIADES
    @Datengineerwill
    @Whatismoo
    @Kal
    @Zadlo
    @Xoon
    detailed below is the expected format of the final submission.
    The date is set as Wednesday the 19th of June at 23:59 GMT.
    Again, incomplete designs may be submitted as they are and will be judged as seen fit.
     
    FINAL SUBMISSION:
    Vehicle Designation and name

    [insert 3-projection (front, top, side) and isometric render of vehicle here)



    Table of basic statistics:

    Parameter

    Value

    Mass, combat


     
    Length, combat (transport)


     
    Width, combat (transport)


     
    Height, combat (transport)


     
    Ground Pressure, MMP (nominal)


     
    Estimated Speed


     
    Estimated range


     
    Crew, number (roles)


     
    Main armament, caliber (ammo count ready/stowed)


     
    Secondary armament, caliber (ammo count ready/stowed)


     

     
    Vehicle designer’s notes: explain the thought process behind the design of the vehicle, ideas, and the development process from the designer’s point of view.

    Vehicle feature list:
    Mobility:

    1.     Link to Appendix 1- RFP spreadsheet, colored to reflect achieved performance.

    2.     Engine- type, displacement, rated power, cooling, neat features.

    3.     Transmission- type, arrangement, neat features.

    4.     Fuel- Type, volume available, stowage location, estimated range, neat features.

    5.     Other neat features in the engine bay.

    6.     Suspension- Type, Travel, ground clearance, neat features.

    Survivability:

    1.     Link to Appendix 1 - RFP spreadsheet, colored to reflect achieved performance.

    2.     Link to Appendix 2- armor array details.

    3.     Non-specified survivability features and other neat tricks- low profile, gun depression, instant smoke, cunning internal arrangement, and the like.

    Firepower:

    A.    Weapons:

    1.     Link to Appendix 1- RFP spreadsheet, colored to reflect achieved performance.

    2.     Main Weapon-

    a.      Type

    b.      Caliber

    c.      ammunition types and performance (short)

    d.     Ammo stowage arrangement- numbers ready and total, features.

    e.      FCS- relevant systems, relevant sights for operating the weapon and so on.

    f.      Neat features.

    3.     Secondary weapon- Similar format to primary. Tertiary and further weapons- likewise.

    4.     Link to Appendix 3- Weapon system magic. This is where you explain how all the special tricks related to the armament that aren’t obviously available using Soviet 1961 tech work, and expand to your heart’s content on extimated performance and how these estimates were reached.

    B.    Optics:

    1.     Primary gunsight- type, associated trickery.

    2.     Likewise for any and all other optics systems installed, in no particular order.

    C.    FCS:

    1.     List of component systems, their purpose and the basic system architecture.

    2.     Link to Appendix 3- weapon system magic, if you have long explanations about the workings of the system.

    Fightability:

    1.     List vehicle features which improve its fightability and useability.

    Additonal Features:

    Feel free to list more features as you see fit, in more categories.

    Free expression zone: Let out your inner Thetan to fully impress the world with the fruit of your labor. Kindly spoiler this section if it’s very long.


     Example for filling in Appendix 1
  19. Tank You
    N-L-M got a reaction from Toxn in Californium 2250- final submissions   
    ATTENTION DUELISTS:
    @Toxn
    @LostCosmonaut
    @Lord_James
    @DIADES
    @Datengineerwill
    @Whatismoo
    @Kal
    @Zadlo
    @Xoon
    detailed below is the expected format of the final submission.
    The date is set as Wednesday the 19th of June at 23:59 GMT.
    Again, incomplete designs may be submitted as they are and will be judged as seen fit.
     
    FINAL SUBMISSION:
    Vehicle Designation and name

    [insert 3-projection (front, top, side) and isometric render of vehicle here)



    Table of basic statistics:

    Parameter

    Value

    Mass, combat


     
    Length, combat (transport)


     
    Width, combat (transport)


     
    Height, combat (transport)


     
    Ground Pressure, MMP (nominal)


     
    Estimated Speed


     
    Estimated range


     
    Crew, number (roles)


     
    Main armament, caliber (ammo count ready/stowed)


     
    Secondary armament, caliber (ammo count ready/stowed)


     

     
    Vehicle designer’s notes: explain the thought process behind the design of the vehicle, ideas, and the development process from the designer’s point of view.

    Vehicle feature list:
    Mobility:

    1.     Link to Appendix 1- RFP spreadsheet, colored to reflect achieved performance.

    2.     Engine- type, displacement, rated power, cooling, neat features.

    3.     Transmission- type, arrangement, neat features.

    4.     Fuel- Type, volume available, stowage location, estimated range, neat features.

    5.     Other neat features in the engine bay.

    6.     Suspension- Type, Travel, ground clearance, neat features.

    Survivability:

    1.     Link to Appendix 1 - RFP spreadsheet, colored to reflect achieved performance.

    2.     Link to Appendix 2- armor array details.

    3.     Non-specified survivability features and other neat tricks- low profile, gun depression, instant smoke, cunning internal arrangement, and the like.

    Firepower:

    A.    Weapons:

    1.     Link to Appendix 1- RFP spreadsheet, colored to reflect achieved performance.

    2.     Main Weapon-

    a.      Type

    b.      Caliber

    c.      ammunition types and performance (short)

    d.     Ammo stowage arrangement- numbers ready and total, features.

    e.      FCS- relevant systems, relevant sights for operating the weapon and so on.

    f.      Neat features.

    3.     Secondary weapon- Similar format to primary. Tertiary and further weapons- likewise.

    4.     Link to Appendix 3- Weapon system magic. This is where you explain how all the special tricks related to the armament that aren’t obviously available using Soviet 1961 tech work, and expand to your heart’s content on extimated performance and how these estimates were reached.

    B.    Optics:

    1.     Primary gunsight- type, associated trickery.

    2.     Likewise for any and all other optics systems installed, in no particular order.

    C.    FCS:

    1.     List of component systems, their purpose and the basic system architecture.

    2.     Link to Appendix 3- weapon system magic, if you have long explanations about the workings of the system.

    Fightability:

    1.     List vehicle features which improve its fightability and useability.

    Additonal Features:

    Feel free to list more features as you see fit, in more categories.

    Free expression zone: Let out your inner Thetan to fully impress the world with the fruit of your labor. Kindly spoiler this section if it’s very long.


     Example for filling in Appendix 1
  20. Tank You
    N-L-M got a reaction from LoooSeR in Californium 2250- final submissions   
    ATTENTION DUELISTS:
    @Toxn
    @LostCosmonaut
    @Lord_James
    @DIADES
    @Datengineerwill
    @Whatismoo
    @Kal
    @Zadlo
    @Xoon
    detailed below is the expected format of the final submission.
    The date is set as Wednesday the 19th of June at 23:59 GMT.
    Again, incomplete designs may be submitted as they are and will be judged as seen fit.
     
    FINAL SUBMISSION:
    Vehicle Designation and name

    [insert 3-projection (front, top, side) and isometric render of vehicle here)



    Table of basic statistics:

    Parameter

    Value

    Mass, combat


     
    Length, combat (transport)


     
    Width, combat (transport)


     
    Height, combat (transport)


     
    Ground Pressure, MMP (nominal)


     
    Estimated Speed


     
    Estimated range


     
    Crew, number (roles)


     
    Main armament, caliber (ammo count ready/stowed)


     
    Secondary armament, caliber (ammo count ready/stowed)


     

     
    Vehicle designer’s notes: explain the thought process behind the design of the vehicle, ideas, and the development process from the designer’s point of view.

    Vehicle feature list:
    Mobility:

    1.     Link to Appendix 1- RFP spreadsheet, colored to reflect achieved performance.

    2.     Engine- type, displacement, rated power, cooling, neat features.

    3.     Transmission- type, arrangement, neat features.

    4.     Fuel- Type, volume available, stowage location, estimated range, neat features.

    5.     Other neat features in the engine bay.

    6.     Suspension- Type, Travel, ground clearance, neat features.

    Survivability:

    1.     Link to Appendix 1 - RFP spreadsheet, colored to reflect achieved performance.

    2.     Link to Appendix 2- armor array details.

    3.     Non-specified survivability features and other neat tricks- low profile, gun depression, instant smoke, cunning internal arrangement, and the like.

    Firepower:

    A.    Weapons:

    1.     Link to Appendix 1- RFP spreadsheet, colored to reflect achieved performance.

    2.     Main Weapon-

    a.      Type

    b.      Caliber

    c.      ammunition types and performance (short)

    d.     Ammo stowage arrangement- numbers ready and total, features.

    e.      FCS- relevant systems, relevant sights for operating the weapon and so on.

    f.      Neat features.

    3.     Secondary weapon- Similar format to primary. Tertiary and further weapons- likewise.

    4.     Link to Appendix 3- Weapon system magic. This is where you explain how all the special tricks related to the armament that aren’t obviously available using Soviet 1961 tech work, and expand to your heart’s content on extimated performance and how these estimates were reached.

    B.    Optics:

    1.     Primary gunsight- type, associated trickery.

    2.     Likewise for any and all other optics systems installed, in no particular order.

    C.    FCS:

    1.     List of component systems, their purpose and the basic system architecture.

    2.     Link to Appendix 3- weapon system magic, if you have long explanations about the workings of the system.

    Fightability:

    1.     List vehicle features which improve its fightability and useability.

    Additonal Features:

    Feel free to list more features as you see fit, in more categories.

    Free expression zone: Let out your inner Thetan to fully impress the world with the fruit of your labor. Kindly spoiler this section if it’s very long.


     Example for filling in Appendix 1
  21. Tank You
    N-L-M got a reaction from Lord_James in Bar / Cage armour + LASSO + RPGnet   
    Nope. The cage neutralizes the piezo fuze of RPGs by shorting the inner cone and the outer cone (vua crushing the outer inwards). Missiles with full width fuzes will detonate, and while the jet may suffer a bit from the increased standoff it's still gonna function.

    For example, the OG TOW warhead, which as you can see has a full width crush fuze. And has terrible built in standoff, so a cage would likely improve its performance.
  22. Tank You
    N-L-M got a reaction from Toxn in Competition: Californium 2250   
    No, sometime next week, sorry. Update soon.
  23. Tank You
    N-L-M reacted to LoooSeR in Jihad design bureau and their less mad opponents creations for killing each other.   
    Note that in Libya troops of field marshal Haftar use silhouettes of Africa and Libya in camo patterns.

     
     
  24. Metal
    N-L-M reacted to ZloyKrolik in Your Tank Stories   
    Time for another tank story:
     
    This time it is the early '90s, I'm a TC on an M1A1 in the Oregon National Guard, G Trp 82nd Cav. Annual training at Gowen Field, Orchards Training Center, outside of Boise ID. This didn't happen to me, but I witnessed the event. We were down range on the night portion of TT VIII. My buddy Duncan was the gunner on the Platoon Sergeant's tank. This happened during Duncan's run. It was what we called the "Widow Maker": on the move, NBC environment, two targets, a BMP & then a troop target.
     
    During this engagement, Duncan's TC gives the fire command "Gunner, HEAT, PC!", the rest of the crew & Duncan react appropriately and service the target. The TC calls cease fire on the PC & gives the fire command of "Gunner, Coax, Troops!", but the loader had already loaded a new round in the main gun and had placed the main gun safety to fire. Not normally a big deal if the gunner had switched from main gun to coax, but on the M1A1 there was a switch for each of the main gun and coax, so it was possible to fire both at the same time if both were set to fire and the loader's safety was set to fire.
     
    This time at Gowen Field, on the main tank range for TT VIII, the observation tower for that range, they had a TTS thermal sight from an M60A3 rigged up in the tower with a video camera to record it for the evaluation NCO to use during night gunnery, so there was a recording of what happened.
     
    Duncan lays on the troop target, gets a range and fires. "On the Way!', BOOOM rattatttattaat! goes the main gun and coax, "Shit!" goes Duncan. 
     
    Later in the tower, I was there when the evaluator goes over that engagement with Duncan's crew., along with the video from the tower. You could clearly see the troop target as it rises on the range, hear the fire commands given by Duncan's TC and watch as a 120mm training heat round hits the left most troop target. The troop target just disappears, flies right off the target array, and then you can see the tracers from the coax strike around the troop target as it lowers back down. 
     
    The evaluator commented that while that they hit the target & it was suppressed, they engaged with the wrong weapon system, - 30 points. They were impressed that he hit the target. Later someone went down range and retrieved that target, it had a 120mm hole in it at about the level of the heart, nice shot. They later hung it up in the tower briefing room.
  25. Tank You
    N-L-M got a reaction from LostCosmonaut in Competition: Californium 2250   
    Well, now's as good a time as any for the great announcement:
     
    ATTENTION COMPETITORS:
    @Toxn
    @Collimatrix
    @LostCosmonaut
    @Lord_James
    @DIADES
    @Datengineerwill
    @Whatismoo
    @Kal
    @Zadlo
    @Xoon
    And any others I may have missed:
    The time of submission is approaching, and the DPRC is getting ready to evaluate your designs!
    Detailed submission guidelines will be posted soon in a dedicated thread.
    The date of submission is in 3 weeks from the time of posting, Tuesday the 11th of June at 23:59 GMT.
     
    Incomplete designs may be submitted as they are and will be judged as seen fit.
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