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

Ainen

Contributing Members
  • Posts

    11
  • Joined

  • Last visited

Reputation Activity

  1. Funny
  2. Funny
    Ainen got a reaction from CrappyHead in The Soviet Tank Thread: Transversely Mounted 1000hp Engines   
    It's inconvenience for a reason that Russia doesn't employ child soldiers. 
  3. Tank You
    Ainen reacted to Scout in United States Military Vehicle General: Guns, G*vins, and Gas Turbines   
    BAE Systems Mobile Protected Firepower (MPF)

     

  4. Tank You
    Ainen reacted to LoooSeR in GLORIOUS T-14 ARMATA PICTURES.   
    B-11 with Epokha

     
       Service (or loading?) hatch located in rear plate of the turret.
     
  5. Tank You
    Ainen reacted to LoooSeR in General artillery, SPGs, MLRS and long range ATGMs thread.   
    Roof service hatch on turret is visible.
     

  6. Tank You
    Ainen reacted to watch_your_fire in J2M Raiden   
    It's quite interesting that the J2M was faster than the Hellcat above 6km, I wonder if it's due to the pressure generated by the engine's inlet fan?

    The Fw-190 is the only other plane that comes to mind when I think of this sort of inlet fan, so it might have been one of those "super special axis wonderwaffles" that gave these planes an edge at higher altitudes. What's strange to me, though, is that the main production J2Ms (J2M2 and J2M3) didn't even have superchargers AFAIK, which is.... awful, frankly, for a plane that was fighting this late into the war. And yet, even without superchargers, the flight performance seems reasonably competitive even at those higher altitudes.
    In fact, the F6F did have a two speed supercharger through most of it's variants, so the fact that the J2M was faster at higher altitudes (where superchargers become increasingly important) is doubly paradoxical.
     
    To me, and of course this is just a guess, I would have to imagine that Jiro Horikoshi must have predicted that Japan's aircraft industry would be incapable of producing proper modern supercharged radial engines, while still early in the design process of the J2M. This would make sense, as his most famous design, the A6M, was basically built around this idea of making the absolute most out of Japan's terrible aircraft radials. So, rather than building the J2M along the lines of American or European radial powered fighters, he must have seriously spent some time figuring out how to maximize ram air with that huge engine cowling and that large inlet fan. The end result was a fighter that could maintain manifold pressure up to high altitudes better than some planes that had the luxury of turbo/superchargers.
     
    I would propose then that while the FW-190s inlet fan was included more for cooling and feeding it's supercharger than anything else, the inlet fan on the J2M was included explicitly to maximize manifold pressure at higher altitudes.
     
    It's a shame the Japs burned all their documents after the war, I would be really interested in exactly how fast that fan spins, and how much air pressure there is inside that engine cowling as compared to the outside.
     
  7. Tank You
    Ainen reacted to LoooSeR in Models and pictures of Soviet MBT designs from 80s. Object 477A, Object 490 Buntar and Object 299.   
    Xmszeon made renders of finished 477 3D model.

     
     
  8. Tank You
    Ainen reacted to skylancer-3441 in Models and pictures of Soviet MBT designs from 80s. Object 477A, Object 490 Buntar and Object 299.   
    from Andrei_bt tweet, color-corrected, upscaled
  9. Tank You
    Ainen reacted to Cleb in Land 400 Phase 3: Australian IFV   
    Another video of the AS21. This video shows some footage of the 3rd prototype moving, along with it being loaded for shipment to Australia last month. There is also the same footage from the video posted by DTR in this one as well.
     
     
  10. Tank You
    Ainen reacted to Kal in Land 400 Phase 3: Australian IFV   
    EOS's team redback launch blurb. https://www.eos-aus.com/hanwha-launches-the-redback-in-australia/
     

  11. Tank You
    Ainen reacted to 2805662 in Land 400 Phase 3: Australian IFV   
    AS21 rollout:
     
     
  12. Tank You
    Ainen reacted to LoooSeR in Vehicles of the PLA: Now with refreshing new topic title!   
    So this "ERA" on frontal part of the ZTZ-99A2 turret is not ERA at all, but ceramics or some kind of composite/NERA. If it is ceramics, it could seriously help with APFSDS at some angles, AFAIK. That way of mounting armor is really different from Russian - in our tanks NERA/ceramics/whatever is placed inside of steel "pockets".
     

    Screws?
  13. Tank You
    Ainen reacted to Valryon in Polish Armoured Vehicles   
  14. Tank You
    Ainen reacted to Zadlo in Polish Armoured Vehicles   
    Borsuk during the qualification tests in Drawsko.
    This prototype received additional armour modules on external buoyancy modules and has removed trim vane.
     

     

     

  15. Tank You
    Ainen reacted to SH_MM in North Korean armor: little Kim's less explosive tools   
    Found a few higher resolution photographs from the recent North Korean military parade. We didn't have a topic for BEST KOREAN armored fighting vehicles, so here it is.
     
    New main battle tank, Abrams-Armata clone based on Ch'ŏnma turret design (welded, box-shaped turret) and Sŏn'gun hull design (i.e. centerline driver's position). The bolts of the armor on the hull front is finally visible given the increased resolution. It might not be ERA given the lack of lines inbetween. Maybe is a NERA module akin to the MEXAS hull add-on armor for the Leopard 2A5?
     
    Other details include an APS with four radar panels (the side-mounted radar panels look a lot different - and a lot more real - than the ones mounted at the turret corners) and twelve countermeasures in four banks (two banks à three launchers each at the turret front, two banks à three launchers on the left and right side of the turret). Thermal imagers for gunner and commander, meteorological mast, two laser warning receivers, 115 mm smoothbore gun without thermal sleeve but with muzze reference system, 30 mm grenade launcher on the turret, six smoke grenade dischargers (three at each turret rear corner)
     


     
    IMO the layout of the roof-mounted ERA is really odd. Either the armor array covering the left turret cheek is significantly thinner than the armor on the right turret cheek or the roof-mounted ERA overlaps with the armor.
     


    The first ERA/armor element of the skirt is connected by hinges and can probably swivel to allow better access to the track. There is a cut-out in the slat armor for the engine exhaust. Also note the actual turret ring - very small diameter compared to the outer dimensions of the turret.
     
    Stryker MGS copy with D-30 field gun clone and mid engine:

    Note there are four crew hatches. Driver (on the left front of the vehicle), commander (on the right front of the vehicle, seat is placed a bit further back), gunner (left side of the gun's overhead mount, next to the gunner's sight) and unknown crew member (right side of gun's overhead mount with 30 mm automatic grenade launcher mounted at the hatch). The vehicle also has a thermal imager and laser rangefinder (gunner's sight is identical to the new tank), but no independent optic for the commander. It also has the same meteorological mast and laser warner receivers as the new MBT.
     
    What is the purpose of the fourth crew member? He cannot realistically load the gun...
     
    The vehicle has a small trim vane for swimming, the side armor is made of very thin spaced steel that is bend on multiple spots, so it clearly is not ceramic armor as fitted to the actual Stryker.

     
    The tank destroyer variant of the same Stryker MGS copy fitted with a Bulsae-3 ATGM launcher.
     

    Note that there is again a third hatch with 30 mm automatic grenade launcher behind the commander's position. Laser warning receivers and trime vane are again stand-out features. The sighting complex for the Bulsae-3 ATGMs is different with a large circular optic (fitted with cover) probably being a thermal imager and two smaller lenses visible on the very right (as seen from the vehicle's point of view) probably containing a day sight and parts of the guidance system.
     

    Non line-of-sight ATGM carrier based on the 6x6 local variant of the BTR, again fitted with laser warning receivers and a trim vane. There are only two hatches and two windows, but there is a three men crew inside.
     
     
    There are a lot more photos here, but most of them are infantry of missile system (MLRS' and ICBMs).
  16. Tank You
    Ainen reacted to LoooSeR in General artillery, SPGs, MLRS and long range ATGMs thread.   
    Much better pics of North Korean SPG.

       Laser warning receivers, smoke grenades, possibly a radar over gun barrel (like on PLZ-05 SPG), double AGS on top. On the left i guess we can see long vertical slit for direct optical sight, while on the right a camera is mounted on turret roof edge. Cannon's recoil system is mounted assymetrically, 3 cylinders are visible near gun mantlet. Chassis is reversed tank chassis with engine deck in the front. Circle thingy in the middle of LFP is cooling fan access hatch. Grills are sort-of visible on UFP, indicating air intakes.
     

       From the side we have better view on engine compartment layout, and it is very similar to classic Soviet tanks arrangement, with small changes to air exhaust location. Engine exhaust is located over 1st roller, while air exhaust is placed over drive sprockets and to the side, instead of usual Soviet location on top of engine deck. Air intake is located on upper part of engine deck, behind gun stop, but before a "step" of crewed section of the hull.
     
       Overall not that much was done with chassis of a tank to make chassis for this SPG, at least when it comes to engine compartment. Air exhaust was moved to the sides probably to move hot air flow from area just above engine compartment roof to somewhere where they will be away from sight LOS/Gun/etc.
     
       Main combat systems are located in turret and crewed part of the hull, but nothing is known about those.
  17. Tank You
    Ainen reacted to LoooSeR in General artillery, SPGs, MLRS and long range ATGMs thread.   
    North Korean "Stryker" used as chassis for ATGM launcher/AT vehicle.

     
     
       Unknown NLOS ATGMs on North Korean BTR-based 6 wheeled vehicle

     
     
  18. Tank You
    Ainen reacted to LoooSeR in General artillery, SPGs, MLRS and long range ATGMs thread.   
    Air exhaust is located on both sides, but engine exhaust is indeed located on the same side of the hull as driver's position. They should have tried to put that on other side for better comfort of driver when hatch is open.

       Also, some changes are visible between 2018 vehicles and 2020. MANPADS are gone, some sort of sight was mounted on roof edge on the right of the gun and possibly a radar mounted on new vehicle above cannon.
     

×
×
  • Create New...