Tuesday, 6 February 2018

Improved ZIS-30

"Tactical-technical requirements for the design of anti-tank artillery

1. The main purpose of anti-tank artillery is the escort of armoured units, combat against enemy tanks, enemy anti-tank artillery, and suppression of machinegun strongholds (nests) during an offensive with infantry or tank riders.

2. The anti-tank SPG must satisfy the following requirements:
  1. Minimal possible requirements, low bore axis.
  2. Possibility of firing from short stops without deploying trails.
  3. The STZ tractor is used as chassis (if possible, without conversions or additions).
  4. The engine can be replaced, but only with another engine that is presently in production.
  5. The top speed of the SPG must be within 25-30 kph.
  6. The maximum ground pressure can be from 0.5 to 0.7 kg/cm². 
  7. Maximum grade is up to 30 degrees off-road.
  8. Cruising range must be at least 200 km
3. The I-13-52 cannon designed by NII-13 is used (if possible, without conversions or additions) as armament, with the following characteristics:
  1. Caliber: 57 mm
  2. Muzzle velocity: 920 m/s
  3. Maximum pressure: 3100 kg/cm²
  4. Ammunition from the ZIS-2
  5. Vertical range: from -6 to + 12 degrees
  6. Horizontal range: 360 degrees (desirable)
  7. Recoil resistance: 1800 kg
  8. Recoil length: 30-40 mm
  9. System weight (with mount) 850 kg
  10. Barrel length: 3145 mm
  11. Penetration at 30 degrees:
    1. 300 m: 79 mm
    2. 600 m: 73 mm
4. The SPG's armour must provide:
    1. Protection of the engine and transmission from a direct hit of a 45 mm tank or anti-tank gun (45-50 mm).
    2. Frontal protection: 30-45 mm.
    3. Crew protection (side shields): bulletproof, 6-8 mm.
    4. The breech and roof are unarmoured.
5. Ammunition stored onboard must be at least 200 rounds, protected with bulletproof armour.

6. The crew must consist of a driver, gunner, loader, and commander.

Chairman of the NKV Technical Council, E. Satel"

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