Thursday, 15 October 2015

Experimental Guns

"Decree of the State Committee of Defense #4857ss
December 27th, 1943
Moscow, Kremlin

On the design, production, and trials of experimental guns for tanks and SPGs.

The State Committee of Defense decrees that:
  1. On the 85 mm tank gun: GAU chief comrade Yakovlev and Armoured Forces commander comrade Fedorenko must perform trials of the 85 mm S-53 and S-50 guns installed in T-34 tanks (S-53 in a T-34 with a stock 1420 mm turret ring, S-50 in a tank with a widened turret ring) and the 85 mm LB-1 gun designed by factory #92 in a T-34 with a widened turret ring before December 30th, 1943.
    Report to GOKO on results by January 2nd, 1944.
  2. On the 100 mm tank gun (comrade Grabin):
    1. NKV (comrade Ustinov) and TsAKB (comrade Grabin) must provide the S-34 100 mm tank gun for trials by January 1st, 1944.
      GAU chief (comrade Yakovlev) and Armoured Forces commander (comrade Fedorenko) must perform trials by January 5th, 1944.
      Report to GOKO on results by January 7th, 1944.
    2. NKV (comrade Ustinov) and factory #92 director comrade Yelyan must produce two S-34 100 mm guns according to blueprints from TsAKB, one for the IS tank and one for an SPG on the T-34 chassis to factory #100 by January 25th, 1944.
    3. NKTP (comrade Malyshev) and factory directors of Kirov factory (comrade Zaltsmann), factory #100 (comrade Kotin) and Uralmash (comrade Muzrukov) must design and produce an IS tank and an SPG on the T-34 chassis with 100 mm guns.
      Perform factory trials of the IS tank and SPG with 100 mm guns by February 20th and provide the tank and SPG for proving grounds trials by February 25th.
    4. GAU (comrade Yakovlev) and the Armoured Forces commander (comrade Fedorenko), in cooperation with NKTP and NKV, must, within five days, perform trials of the IS tank and SPG with 100 mm guns and deliver a conclusion to GOKO by March 5th, 1944.
    5. TsAKB (comrade Grabin) must include the possibility to install an 85 mm barrel into the S-34 mount to achieve a muzzle velocity of 1000-1100 m/s and begin the production of this gun with the aim of producing an experimental prototype for government trials by April 1st, 1944.
    6. People's Commissariat of Ammunition (comrade Vannikov) must produce ammunition (casing, propellant, AP and HE shells) for the 85 mm TsAKB gun with a muzzle velocity of 1000-1100 m/s and provide 1000 proof rounds as well as 250 each HE and AP rounds.
  3. On the 130 mm tank gun (comrade Grabin):
    1. NKV (comrade Ustinov) and TsAKB (comrade Grabin) must design by January 5th 1944 and produce by March 1st 1944 an experimental prototype of a 130 mm gun, with the ballistics of the 130 mm B-13 naval gun, to be used in an SPG on the IS chassis.
    2. Director of factory 232, comrade Zakharyin, must produce a barrel with breech and other components, as well as cast and forged components, and deliver them to TsAKB by the aforementioned date.
    3. NKV (comrade Ustinov) and TsAKB (comrade Grabin) must send one 130 mm SPG gun to factory #100 by March 10th, 1944.
    4. NKTP (comrade Malyshev) and directors of factory #100 and Kirov factory must design an SPG on the IS tank chassis to use a 130 mm gun.
      Begin factory trials of the 130 mm SPG by April 1st, 1944, and provide it for proving grounds trials by April 5th, 1944.
    5. GAU (comrade Yakovlev) and the Armoured Forces commander (comrade Fedorenko), in cooperation with the NKTP and NKV, must complete proving grounds trials in five days' time and report to GOKO with their conclusions by April 10th.
    6. People's Commissar of Ammunition (comrade Vannikov) must produce 500 each of HE shells for the 130 mm SPG, AP and HE shells for the 122 mm gun with a muzzle velocity of 1000 m/s, and deliver them by March 20th, 1944 for trials.
  4. On the increased muzzle velocity of the 122 mm tank gun:
    1. NKV (comrade Ustinov), TsAKB (comrade Grabin), OKB-172 (comrade Ivanov) and factory #172 director (comrade Bykhosvkiy) must design and produce two prototypes of a 122 mm gun with a muzzle velocity of at least 1000 m/s using a 25 kilogram shell (one designed by TsAKB and one by OKB-172) to be used in an IS SPG.
      Submit finished prototypes to factory #100 for installation in vehicles by March 10th, 1944.
    2. NKTP (comrade Malyshev), Kirov factory director (comrade Zaltsmann) and factory #100 director (comrade Kotin), in cooperation with TsAKB and OKB-172, must design IS SPGs with TsAKB and OKB-172 122 mm guns.
      Finished SPGs must be submitted for proving grounds trials by April 1st, 1944.
    3. GAU (comrade Yakovlev) and the Armoured Forces commander (comrade Fedorenko), in cooperation with the NKTP and NKV, must complete proving grounds trials of the SPGs within 10 days and submit their conclusions to GOKO by April 15th, 1944.
Chair of the Committee of Defense, I. Stalin."

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