Tanks that did not Make It: K-90 Amphibious Tank

Hello everyone,

if you remember the ancient Soviet tree post, you might also remember that in one of its very first iterations by Pyotr Bityukov, the Soviet light tanks actually had a… well, I won’t say tier 6, because at that point, there were no tiers yet, but a high-level light tank, called the K-90. It got removed in later iterations, but we’ll have a look at it nonetheless.


As you can see from the shape of this vehicle, it’s an amphibious tank. That, of course, is a problem when it comes to today’s World of Tanks – the rule is: no amphibious vehicles (same reason why we don’t see the PT-76 in the game, even if it would fit).

K-90 was developed in early 1950 in Moscow by the Special Design Bureau of the Land Forces Engineering Committee under the leadership of A.F.Kravcev. When designing the vehicles, the Soviet engineers used a lot of components from the tracked artillery tractor M-2 (suspension) and from the MAZ-200 truck (engine). Two prototypes were made – one of them underwent comparative trials along with another vehicle, Object 740 (PT-76 prototype from Chelyabinsk) in July 1950. The comparison did not end well for the K-90 – for its inferior amphibious qualities (was being able to overcome less obstacles) and inferior reliability of its transmission and engine, the vehicle was not recommended for service and stayed in the prototype stage only, while the Object 740 evolved into the PT-76. Currently, one prototype is in Kubinka museum.


The vehicle was very light, it weighed only 10,5 tons, but it was powered by a 140hp YAZ-204 engine (13,3 hp/t), giving it maximum speed of 42 km/h. It coul also swim with the speed of 10 km/h.

It was 6,21m long, 2,95m wide, 2,26m tall and had a clearance of 40cm. The armor, as you can imagine, was very thin – 15mm at the front (the extremely sloped upper part – 78 degrees – was only 6mm thick), 10-8mm sides and 6mm rear. The turret armor was 15/12/12mm. The vehicle was armed with the 76mm LB-76T L/42 gun (elevation -5/+30, 40 rounds of ammunition) – the gun was manually loaded with combat rate of fire of 6-7 rounds per minute.

For World of Tanks, this design (even if amphibeans were implemented) is rather weak for high tiers, but… if we ever do get an amphibious branch of Soviet tanks, it might appear in it. Somewhere.




Russian wikipedia

13 thoughts on “Tanks that did not Make It: K-90 Amphibious Tank

    • Agreed. I mean, we have the BT-SV in the game, which was amphibious irl but isn’t in the game, so it could work.

      • The BT-SV wasn’t actually amphibious, though. It looks like it, but it wasn’t.

  1. I don’t see a point of not having amphibious…It just a bit bigger and more boxy shape….give it to LT class so has better camo to compensate….

    The only reason WG said no and most players can accept is; they can’t ram a drowning arty….:(

  2. I personally want to see PT76 even with sans Amphibious capability. The PT-76 has an awesome gun and was extensively modified by countries who managed to get their hands on such a vehicle.

  3. We need amphibs…. just like we need maps substantially larger (at least 5k x 5k or larger) so these little guys can traverse rivers or small pools in obscure areas to do some *real* scouting.

  4. i find it weird why WG doesn’t want more amphibious tanks, the BT-SV was amphibious, although its not modeled in WOT i see machines that could go on water an advantage and disadvantage.