Jump to content
Please support this forum by joining the SH Patreon ×
Sturgeon's House

Xoon

Contributing Members
  • Posts

    548
  • Joined

  • Last visited

  • Days Won

    8

Everything posted by Xoon

  1. Hydraulic efficiency is not that bad in a closed loop system with a swash plate pump. Around 80-85%. Combined with accumulators and very good torque characteristics and they are not that bad. When it comes to electric propulsion, simply use two engines, two generators and two motors. Efficiency should be pretty good here, if you can handle the catching on fire and dual engine stuff. I probably wont design a all turret tank, though I like having the option. Maybe if I got some extra time. I am more aiming at learning and being creative in this competition than actually winning. For now, I am thinking about a Strv 103-BV206 hybrid with hydraulic drive. IF I can't have my microprocessors and transistors, I damn well am going to have my special tank.
  2. Imagine a BV206, only that everything can rotate 360 degrees. Like a excavator. Because I am sure our superior drivers can cope with the sudden rotation of his workstation and sometimes complete lack of vision while guiding his vehicle through narrow mountain roads. No less should be expected. In a way, the vehicle would be a turret on tracks. Kinda like this: Also, welcome Zadlo to the forum and this GLORIES competition, I am looking forward to your great contribution to the greater good.
  3. If a AFV lacks a turret, can it ignore the turret requirements? Or does it transfer to the hull? Does the same apply for a AFV lacking a hull?
  4. So no Strv 103? True, but its neat to have the option. Aluminum is really hard to weld in my experience, compared to steel, so I was just worried about the weld quality. But I assume they are equal.
  5. I have a few questions: 1. Is a 360 degree turret required? 2. Are tracks required? 3. What type of terrain is the vehicle expected to operate in? Marsh, swamp, snowy, rocky, hilly, forested, mountainous, many rivers? , many lakes?, frequent river crossings? Urban fighting? Frequent use of tunnels? etc. 4. What is the quality and capability of the welding industry? Does aluminum welds reach the same quality as steel welds? 5. When requiring it to fit the average soldier at 1,7m, does that mean the 95th percentile of a population with a average height of 1,7m? 6. If manufacturing capability is present, can technology be "invented"? FCS, RCWS, autoloaders, ballistic computers, engine components etc, made from technology in other industries? Example, manufacturing industries use pneumatic PID regulators, a similar technology could be used for FCS?
  6. I believe a good example would be the British during WWI. They had a small, highly skilled and professional army that was very effective, until most of the highly trained soldiers died of attrition and was replaced by conscription in the meat grinder. In attrition warfare, a highly skilled and equipped army would fail, because if they run out of steam, they would be stuck fighting a war of attrition, exhausting their resources quicker than their enemy. On large fronts, or areas requiring large amounts of troops to cover the front line, a smaller force would be surrounded and destroyed. The Germans during WWII might make a example here, as they pretty much lost the war once they ran out of steam, and was stretched thin by the large front line. I remember something from a American study from WWII, were they found that a soldiers effectiveness actually peaked with experience, and then dropped to the same point as a newly trained solider or even below. Meaning that eventually a elite army would tire out its soldiers, losing some of its effectiveness.
  7. Unless something has changed, Forsvaret does not have any plans to buy a new MBT before the MGCS. Budget issues. Only thing considered is buying basically CV90s with 120mm.
  8. This issue seems to be blown out of proportions. I have a friend who is doing his service time as a conscript in Panserbataljonen. He has not heard anything about this issue. They also train with kampeskadronen. It does seem that some CV90s have a manufacturing fault, with welds causing the leak apparently. It is also rumored that one affect CV90 has had leaks since it was adopted. Though it would not really be surprising, Forsvaret is a mess from what I have been told. This is at least what I have heard. I can translate the articles from Teknisk Ukemagasin if anyone is interested.
  9. As far as I am aware, Sweden was only inspired by the US to test DU armor themselves. Original: " Inspirerade av den valda skyddslösningen i den amerikanska stridsvagnen M1A1 DU där Chobhampansaret uppgraderats med skikt av utarmat uran, gjordes provskjutningar i Sverige även mot denna typ av material. Resultaten visade på möjligheten att nå bättre skyddsprestanda om volymen och inte vikten var gränssättande. " English: " Inspired by the american armor solution in the M1A1 DU main battle tank, in which the Chobham armor was upgraded with layer of depleted uranium, a test was conducted in Sweden of this type of material. The results showed that if was possible to increase armor protection if volume, but not the weight was the limiting factor. " In short, they tested a home made armor, and concluded it was only worth it if volume was the constraint, not the weight. Source: http://www.ointres.se/strv_2000.htm
  10. And you need water injection! Simply drill a hole into the throttle body, run a tube from the window viper pump and BAM! Water injection on demand!
  11. In a ground-survey it was found huge amounts of pure copper in the Nussir-area, in Repparfjord. The Norwegian government gave the green light to start mining the vein. This was disliked by the local Sami who claim they lost land for their reindeer, and of course the usual backlash from environmentalists. Their issue is the mining waste. A dumping are will be constructed, as far as I am aware, they are filling in a portion so isolate it from the rest of the fjord. It takes up roughly 15% of the area. Everything in this area will die, but it is estimated that 10 years after the mining is done, the local fauna will returned to normal levels. It has also been taken special measures to not impact the local reindeer population. So yes, they are dumping mining waste into the fjord, but no, it is not into the open sea, but a purpose built dumping area. Yes the local fauna will die, but it is estimated that it will return. It is unknown weather it will impact the reindeer population, but most point to not. Repparfjord is located in the most Northern part of Norway. Almost all fish produced in Norway is produced in fisheries, which are located in the middle/center parts of the country. So it would not impact the fishing industry. The Sami only live as reindeer herders as a way to maintain traditions, and are granted special rights because of their status. They tend to be very overprotective of their rights, which is why they backlashed. Of course, this was picked up by the biggest newspaper in Norway, and made into a rage-bait hit piece. A lot of lies and provocation to fire up the environmentalists in the capital. For now, I would hire some biologists to analyse the area and impact of mining to get a extended of the risk. It probably has already been done by the government, but it has not gone mainstream. But to be honest, Northern Norway is very poor(the counties, not the populace), with a shrinking population, they want this badly.
  12. " Forsvarets K9 Thunder are soon ready: Here is the Norwegian artillery vehicle The two first vehicles should be built in march. K9 Thunder is the name of the artillery that will replace Norway's 50 year old M109-artillery. It is produced in South Korea, a country which other parts of Forsvaret and Norwegian petroleum industry has had mix experience with. Therefor it is comforting to hear that the factory is en route with the Norwegian artillery delivery. It is Forsvarets Forum which has visited the factory of Hanwha Land Systems in Changwon, just west of Busan. I a airline this is just 40 kilometers north of DSME-shipyard which used two years and two months more than promised to complete the Logistics vessel, KNM "Maud" Here the turret of the Norwegian artillery vehicle is welded.Foto: Ylva Seiff Berge/Forsvarets forum But with Hanwha there is obviously better control: – The two first vehicles will be ready by the end of march. We are en route, we have been there the entire time, says quality director Kyeong Wook-Lim in Hanwha Land Systems to Forsvarets Forum. Four days before christmas in 2017, forsvarsmateriell (FMA) made in public that Hanwha had won the norwegian artillery competition. A contract was signed for 24 K9-artillery with 6 K10 ammuntion carriers. In addition, there is a agreement for 24 more artillery systems at a later date. The project total cost is about 3,2 billion NOK. There is one K9- and K10 ready in about a month to start factory testing, which is estimated to take half a year. Both will be delivered to Norway by Barbromesse 4. December (Sankta Barbara is the artillery corps shooting weekend). K9 Thunder on a visit in region eastland field, 3 years ago. Bilde: Simen Rudi/ Forsvarsmateriell South Korea has license produced american artillery of the type M109 and the MBT of the type M1 from 1990 to 2000 century. They designed a new artillery and MBTs from a blank slate: K9 Thunder and K2 Black Panther which are built by Hanwha and Hyundai Rotem. - Even the barrel on the K9 is newly developed, and is built to NATO standard, like the Koreans usually do. The Korean army is anyways a very though customer with high life time requirements. The artillery system is 20% overbuilt to be sure tjat nothing goes wrong when it is operated by conscripts, has Mognes Rasmus Mogensen i Military Equipment Denmark (MED), which are both companies represented in Norway, earlier told Teknisk Ukeblad. New Ammuntion The artillery will replace the M109 which came to Norway in 1969. K9 Thunder made a good figure at the training grounds by Rena, 3 years ago. Here, four candidates were invited to do tests in the Norwegian winter environment. FMA picked the artillery system which had the highest grade of off the shelf performance and thereby the lowest risk. It was therefor K9 from Hanwha Land Systems (former Hanwha Techwin/Samsung). Finland was a observer during the testing and went straight after in between state negotiations with South Korea which ended with them buying 48 used K9 vehicles. Both the Finnish and Norwegian vehicles will have ICS (Integrated combat systems) from Kongsberg Defense & Aerospace. This is what the finished vehicle looks like. Foto: Hanwha Land Systems The ammunition carrier is named the K10 and is built on the same platform as the K9. Therefor it has the same mobility. It can carry 104 shells and automatically transfer 12 shells per minute to the artillery vehicle without the personnel having to expose themselves. The K9 Thunder has a capacity to send 3 shot in 13 seconds which hit at the same time (MRSI, "Multiple Rounds Simultaneous Impact"), or 6 to 8 shots per minute. For continues fire over an hour, it can manage 2-3 rounds per minute. Foto: Hanwha Land Systems A new thing for Forsvaret, is the canon with a two meter longer barrel(L/52 instead of L/39 on the current M109) and a bigger muzzle velocity. In parallel, NAMMO's new shells, which are named 155 mm IM HE-ER ("Insensitive Munition, High explosive, Extended Range") is bought. This ammunition has a range of over 40 kilometers with a very low spread. NAMMO is also working on a "Extreme range" ammunition which will be ready in four to five years. Here it is talked about a guided shell with the help of a ramjet engine which can hit a target at 150 kilometers away. " Source: https://www.tu.no/artikler/forsvarets-k9-thunder-snart-klar-her-er-den-forste-norske-artillerivogna/458067
  13. It would probably need to suck more. But it is meant as a back up. But honestly, if your country lacks power, how can it even function? If you knock out the power grid in the US, it would probably surrender it less than a month. Either that or the government would throw the citizen under the bus for a slow Berlin like grind until they lost. I am not arguing for a multi fuel diesel capable of running on hydrogen, I was just explaining that it is possible, though not practical. Here's a explanation of the hydrogen injection system: Use a air drier, or optimize it to not run at sub-ambient temperatures. Besides, water injection has already been widely used during WWII and recently has been implemented in BMW's new cars.
  14. It is true that it would not be practical for countries lack a good supply of fresh water. But for those that have large quantities of it, it is not problem. A truck could literally lower a hose into a river and suck up water, while it is powered from the grid. A country could run reverse osmosis, then electrolysis. Though, it is a lot more expensive. The idea is to have a emergency power pack option that could be installed in AFVs when the country in question faces fuel shortages. The power pack would by no means be as good as a conventional power pack, but it would run. The inspiration came from Nazi Germany, which pretty much ran out of fuel, and was unable to properly wage war because of it. Producing methanol or similar would require a more complex process, with a lot more moving parts. A convoy could have a number of hydrogen production units could stop by a transformer by a river, power the trucks pumps and electrolyser, and suck water from the river. Effectively refueling the entire convoy on the spot. This means a armored column could operate outside the supply chain, as long as it has enough ammunition and food. A except the pump and valves, the entire system is solid state, meaning it wont break down. It runs until the end of its lifespan. A gasoline engine can be modified to run on hydrogen. So in theory, a diesel/gasoline multi fuel engine could run on hydrogen. Though, running a ICE on hydrogen is very inefficient. Curiously enough, you can add hydrogen to the air in a diesel to improve mileage and power. The hydrogen is ignited initially by the diesel, but since it flame speed is 10x that of diesel, it ignites the rest of the diesel. A gasoline engine, when modified to run on hydrogen, with direct injection could in theory see a 15% power increase. Though, mostly it would be closer to equal, and with some systems as low as 85% of the original power. One a side note, has anyone tried to use a vortex tube at the air intake of a vehicle? It would allow for super cool air (around -50 C), though it would probably double the drag and air needed into the intake.
  15. A ballpark guess would be 250-500kg of hydrogen per MBT, meaning 2500-5000 liters of water per tank. Not sure about the efficiency in sea water.
  16. I have been pondering about a concept I have yet to hear about it. Considering automobiles are moving towards fully electric or Hybrids, AFVs would most likely follow the same path. My take is a series diesel hybrid is the most likely. I think turbines might make a comeback, if I am not mistaken, the problem was the fuel consumption at idle, while at speed it was close to a piston engine. By using a generator, the turbine would only run at its optimal RPM, shutting off after charging the battery. The long start up time of the turbine would also be solved by running on the battery while it gets up to speed. The reason for using a series hybrid is because it essentially means you have a 1118kw to 1342kw generator to power any equipment on board. The battery would also be able to charged externally. This means a tank crew could still be kept operational by plugging into the grid to charge their vehicle. They could use a type of "limping mode" when fuel was scarce, and run mostly on electricity. This got me thinking. What about powering AFVs with hydrogen? Hang on, hang on. Before you blow your head gaskets, think about this: Most major wars are won by starving the enemy army of fuel. Look at WWII, the Germans had heavy fuels shortages. Hydrogen can be produced with electricity and provide better power density than batteries. This means that a army could operate without having fuel supplied. A truck with a electrolyser, a river and a connection to the grid would be all that would be needed to produce hydrogen for the AFVs. Considering, if a country has no power, it is basically screwed, regardless of how much fuel it has. As maintenance and production would be almost impossible. A war emergency power pack could be used for this, removing the ICE unit and installing a hydrogen fuel cell in its place. It would severely impact the range of the vehicle, but it think it is a nice trade off to not having a running vehicle at all.
  17. Its a metal piece, close to the metal cog connected to the axle. On the opposite side there is a cable connected with a nipple that looks way to flimsy to be a hydraulic coupling. There is also another hose which is way beefier which looks exactly like a hydraulic hose. Considering it is a single acting piston, it should not need more than one hose. The thing looks like a crude axle pulse encoder, basically every time the metal piece passes the cog teeth, a metal sensor detects the metal and sends a pulse to the ECU/ABS controller/thing and it counts it. 360 degrees equal the amount of teeth, the more teeth, the higher resolution. Its either the cars wheel speed sensor or the ABS wheel speed sensor or both. Found this:
  18. Finally got the drum on, found the adjuster. So you believe that replacing the break fluid from DOT 3 to DOT 4 is safe? It says on the container: "ONLY USE DOT 3". The car is pretty old though, 1995-1999 model. I do have a oil pump, do you think it could do the same job? That is true, it makes me feel better, since I would have to remove the rust anyways. Going to remove the rust and weld shut the hole. I am thinking about just gluing on plate though. For now I just taped over the hole to stop snow and mud from getting into the channel. Luckily it is not actually the structural channel, just exterior cosmetics. Yeah, its pretty shit, I am going to get a better tool soon. And yeah, the concept of "correct torque" is non existent here. A friend of mine literally used all his weight and force to tightened his wheels. Poor threads. I found the adjuster, hidden in between there. Messed with it for a bit. It was adjusted all the way out, explaining why I could not get on the pads. Though it is a pain to accurately adjust loved to jump several teeth. The problem is that the plug broke, snapped in half. Now the hole is permanently plugged. I either I drill it out and tap a new thread, or I just replace the entire thing. Its only a L shaped metal piece, so I might find the part laying around. No, ventilated discs at front, and drums in the rear. So all the shoes are equal length. The car is a Mazda 323F GLX 1,8L (BA) (EU) 1998 model. Does anyone know what this is? The cog and the tap sticking out. It is connected with a hose/cable. My car lacks ABS or traction control, but it could be bought originally as extra equipment. Is it the ABS sensor?
  19. One thing I have been thinking about is how to help a suicidal person if they are actively been bought down by a close relatively like a parent or spouse, when you have no way to removing said individual. On the pure mental, how ever much one tries to help the suicidal person, it is undone by the significant other, since they are more important in life then yourself. For every plus you give to the person, they give them a bigger minus. And considering negatives are usually stronger than positives for the same action, you are working at a loss.
  20. I took my car into the garage today, to do some general maintenance. Was going to change the break liquid, but I bought the wrong type. So I tried changing oil, but the drain plug was so stuck and hard to get that I needed to lift the car, and since I lacked the stands to have it on, so waited with that too. Then I began changing the drum break pads. I could not find the lift point, so in my half hypothermic, half feverish state I mistook the side channel for the lift point and did this: After swearing a lot and getting a better jack, I found the correct point and starting dismounting the drum breaks. Of course, one of the nuts for the wheel got stuck in the wrench, which a had to knock lose with a hammer and screwdriver. After a lot of messing with the breaks to get the got damn pads of, I could not get the drum on. Furious beyond belief, I went in to defrost and ease my back pain. Now I feel very sick. All in all, a typical day, working on the car in -12 C.
  21. I don't know a lot about the US climate, so I just guessed, thanks for correcting me. And yes, I assumed they did, it is the norm her in Norway for washrooms and bathrooms to have tiles, sometimes the hall too. But if you speak about what is the most cost efficient, electric floor heating is not worth is at all. It's a "luxury" thing, people want it so that they can have fancy floors that tend to be very cold, and still have a warm feeling from beneath their feet. A rug is way more cost efficient. The only real upside is the very well distributed heating. I am not sure about the US, but most people know a carpenter or construction worker, or knows how to do flooring in Norway. We do all the prep work for the electrician, then he does the wiring and fuses, and we add the floor again. Sometimes we let the craftsmen do it do have it be extra nice. So it tends to be pretty reasonably priced. Not sure what would break in electric floor heating. It is all solid state, it would outlast your fuses, even the thermostat. Most houses in Norway lack ducting outside of simple air ducts that lets fresh air in, and the blower to getting the cooking fumes and steam out. Most people do have a HVAC and wood stove though. The stove is mostly for the cosy feel, but it is also a back up in case of a power outage, in which it gets very cold in the winter. Electricity is "dirt cheap" here, so that is a big factor. Gas is not reasonably priced. Almost all houses in Norway lack water borne heating. Some do in special cases, like when a furniture factory is nearby and sells he excess heat. Only modern houses have balanced heating with ducts, which means most heating comes from HVAC, heaters, wood stoves and floor heating. New houses tend to have floor heating in every room. Old houses only in the bathrooms and halls, places with tiles. So yes, we use almost purely electrical heating, either through HVAC or heating elements. Never heard of in Norway. Water borne heating is awesome, if you can pay for it. Much more efficient and allows a lot of power saving. Thermal solar panels, wood/gas heating, electric heating, heat pump heating. Though it is simply not worth it to retrofit in most Norwegian houses, and most opt for electrical heating instead in modern houses to save cost.
  22. I was thinking in relation to this, the gulf stream is what keeps Norway from being a cold wasteland. Considering that Ohio is center north in the US, it should be a bit colder than, for example, Italy. But I see your point. Remove the flooring tiles, cut into shape the heating mats, add a power cord and heat sensor, and hook it up to a thermostat. Then re add the flooring. Not very expensive at all. Besides, who uses water borne floor heating outside of eco houses?
  23. I think the hottest summer we have had is 34 degrees C. Heated floor is pretty standard here, pretty much all bathrooms, some washrooms, and in new houses, most floors. Though, I asked a friend in Ohio, and she had never heard about them. Isn't Ohio a tad bit colder?
  24. I am from Norway, north-west Norway. The land of heated floors and salt.
×
×
  • Create New...