|USSR||Heavy Tank||Tier VI|
The T-150 was a further development of the KV-1. The vehicle weighed as much as 50 tons. The T-150 underwent trials in the first half of 1941. A prototype fought in the battles for Leningrad, and became a basis for a modification of the KV-1 with reinforced armor.
Despite its name, the T-150 is an upgraded KV-1. It has the same chassis and turret, with some notable improvements. Additional armor has been added to the hull, a considerably more powerful engine is available, and perhaps most importantly, it can mount the 107 mm ZiS-6 gun. The tank can in fact be frustrating at first, but stick with it, and the improvement of the tank will be extremely noticeable.
The T-150 has an extremely tough grind to its top gun, arguably worse than the M3 Lee, because in order to mount the top gun, you need the turret, and for that you need the suspension too (a painfully high grand total of 44,550 XP).
The alternative KV-1S is more mobile and sports the feared 122mm gun, but lacks the solid overall armour and faster reload of the T-150.
The T-150 leads to the KV-3.
|Guns compatible with this Turret:|
|Guns compatible with this Turret:|
Pros and Cons
- Good 90mm all-round hull armor rewards angling and helps protect against flankers
- Excellent at sidescraping
- Powerful 107mm with good penetration and excellent damage
- Acceptable acceleration and speed
- Lower ammo costs than the KV-1S' 122mm D-2-5T
- Slow traverse speed
- Overall mobility is lacking
- Doesn't perform well versus tier VIII heavies
- One of the more frustrating grinds at tier 6; you must unlock the suspension, turret and the top gun before it can stand a chance against higher tiers.
When stock, the T-150 is slow, well armored, sluggish and weakly armed, playing much like low-tier French light tanks. Stock it equips much of the same weapons of the KV-1, like the 57mm Project 413, 122mm U-11, and an odd 85mm S-31 cannon that has 1mm less penetration than the KV-1's 85mm F-30 and is 10kg lighter, but is otherwise identical. The stock 76mm ZiS-5 gun is an amusing novelty and has no business being in a tier VI heavy tank. The other weapons have good damage and acceptable accuracy, but severely lack penetration. The 122mm U-11 provides the most consistent penetration/damage rate out of all the guns you can mount before the 107mm and is therefore most likely the best choice for your stock grind.
Once upgraded with the 107mm ZiS-6 and engine, this tank is a nice upgrade to the KV-1. In contrast with the KV-2, this tank has better armor, with a turret that's much lower in profile, tougher, with faster traverse and sloped sides. Therefore, a T-150 with the ZiS-6 is quite a bit better than a KV-2 with the ZiS-6, although the reload time is slightly longer and the T-150 naturally can't mount the KV-2's 152 mm M-10.
The 107mm ZiS-6 is somewhat comparable to the 122mm D-2-5T of the KV-1S, dealing 90 less average damage, penetrating 8mm less armor but firing 1.5 rounds per minute faster. This means that while you lose out on the large alpha damage and psychological value of the 122mm, you also don't have to worry so much about reload times. The 107mm is also 0.1m more accurate than the 122mm.
An economical advantage of the 107mm over the D-2-5T is that AP shells cost only 270 credits, compared to the 122mm AP shell cost of 1,025 credits. With only a 90 point drop in alpha damage, this makes the T-150 a much more effective credit making weapon than the KV-1S.
- The 57 mm 413 and 122 mm U-11 guns, and the 10RK radio carry over from the KV-1. Mount whichever gun you prefer immediately.
- Research and mount the suspension.
- Research and mount the second turret
- Now, research the ZiS-6 as soon as possible.
- Lastly, go for the engines.
"By 1 November 1940, the Kirov Plant is to prepare two KV tanks with 90 mm armor. One of them will have the F-32 76 mm main gun, the other an 85 mm main gun. One hull will be delivered from the Izhorsk Plant at the end of October and the preparation of this tank is to be completed by 5 November. The second hull will be completed in November.
By 1 December 1940 the Kirov Plant is to prepare two KV tanks with 100mm armor. One will have the F-32 76mm main gun, the other the 85mm main gun. One hull will be delivered at the end of October, the other in November."
However, the deadline was not met. The plant delivered one KV with 90mm armor and the F-32 Main Gun on 5 November (in documents it is referred to as tank T-150 or Object 150), and one KV with 100mm armor and the 85mm main gun on 5 December (in documents it is referred to as "T-220" or "Object 220").
The T-150 was constructed on the base of the production KV and differed from it only in the magnitude of thickness of the hull armor, which had been increased from 75 to 90 mm. Because the thickening of the armor plates was accomplished externally, all the internal dimensions of the vehicle remained unchanged. In addition, the T-150 had modified mounting brackets for the chassis components and a commander's cupola with periscope and three vision blocks. In connection with the increase in the tank's weight, which had reached 50 tons, a V-2 Engine whose output had been boosted to 700 h.p. was installed.
From 15 January to 14 February 1941 the vehicle underwent range testing (199 km total movement), which exposed a number of substantial deficiencies in the functioning of the engine. For example, during movement on a hard-surface road in 3d and 4th gear, at ambient air temperatures of -9° to -12° the lubricant in the engine became overheated. For this reason the tank was withdrawn from testing, and the Kirov Plant and Plant No. 75 in Kharkov were directed to improve the cooling system and increase the temperature drop of the lubricant that passed through the engine.
The KV-220 externally differed from ordinary KVs by the greater length of the hull, an increase of one support roller in the track, and a new turret with the 85 mm F-30 Main Gun. The weapon was specially designed for arming this tank in the design bureau of Plant No. 92, under the supervision of Grabin. It was tested successfully in the T-28 Medium Tank in the fall of 1940. Because of the steep growth in the weight of the tank, which now reached 62 tons, the V-5 engine with 700 h.p. was mounted. Testing of the KV-220 commenced on 30 January 1941 and was halted the very next day because of engine failure.
On 15 March 1941 the SNK and TsK VKP(b) by their resolution No. 548-232ss required the Kirov Plant to transition to mass production of the T-150 tank in June under the designation KV-3.
The following technical specifications were established:
"Combat weight - 51-52 tons, length - 6.76 metres, width - 3.33 metres, height - 3.0 metres, ground clearance - 0.4 metres, armor - 90 mm, armament - one F-34 76 mm main gun, three DT machine-guns, one PPSh submachine-gun, 114 main gun rounds, 2900 machine-gun cartridges, maximum road speed - 35 km/h, cross-country speed - 15-20 km/h, maximum slope gradient - 40 degrees, range - 250 km (10 hours), V-5 engine with 700 h.p., turret with commander's cupola, KRSTB radio set (with mounting of 71-TK-3 possible), and a guaranteed vehicle life of 2,000 km."
"Regarding the KV-3 Tank (T-150).
1. In modification of SNK and TsK VKP(b) Resolution No. 548-232ss of 15 March 1941, I order:
a) the front-slope armor of the KV-3 to be 115-120 mm and the turret armor to be 115 mm;
b) the KV-3 will be armed with the ZIS-6 107 mm Cannon with a muzzle velocity of 800 m/s;
2. The KV-3 turret is to be formed from forgings with slope angles not less than 30 degrees under the mount for the ZIS-6 107 mm Cannon. The director of the Kirov Plant, Comrade Zaltsman will:
a) by 15 April 1941, together with the Izhorsk Plant, prepare and deliver to the Izhorsk Plant drawings (blueprints) for the modified KV-3 turret and hull;
b) by 25 April 1941, together with the Izhorsk Plant, present for approval of the NKO a mockup of the KV-3 turret.
3. The Kirov Plant will establish a plan for production in 1941 of 500 KV-3 tanks with the ZIS-6 107 mm Cannon.
4. The director of the Kirov Plant, Comrade Zaltsman, is to keep in mind and consideration that:
a) the Izhorsk Plant is obligated to deliver to the Kirov Plant by 20 May 1941 the first forged turret and KV-3 tank hull with full mechanical assemblies and artillery system armor protection. Subsequently, the Izhorsk Plant is responsible to ensure the production and assembly of these turrets and hulls in accordance with the schedule for the output of the KV-3 tanks that has been approved by the Government;
b) The NKV (Comrade Vannikov), Plant No. 92 (Comrade Yelyan), and the Chief Designer of Plant No. 92 (Comrade Grabin), along with the Kirov Plant, are required to develop the drawings for the mounting of the ZIS-6 107 mm Cannon in the KV-3 turret and present them to the NKO for approval by 30 May 1941;
c) Plant No. 92 is required to deliver to Kirov Plant by 25 May 1941 a ZIS-6 107 mm Cannon with mounting parts, mount it in a KV-3 turret, and along with Kirov Plant develop the armor protection for this system;
d) Plant No. 92 of the NKV is required to deliver to Kirov Plant ZIS-6 107 mm Cannons for the 1941 program by the following schedule:
July - 45 Cannons
August - 80 Cannons
September - 110 Cannons
October - 110 Cannons
November - 110 Cannons
and by 15 December - 65 CannonsFor more info see the Sources and External Links Section