picture of this weapon?
These guns were designed after World War II for the heavy cruisers of Pr. 22 and Pr. 66. After Stalin's death in 1953 all work on heavy ships was stopped and the Pr. 22 and Pr. 66 Cruisers were cancelled. Work on the turret design was halted at the same time, but it was decided to continue the design of the gun itself for experimental purposes. The prototype was completed in December 1953 and tests were conducted at Rzhevsk until November 1954. Not accepted for production.
|Designation||220 mm/65 (8.66") SM-40|
|Ship Class Used On||Pr. 22 and Pr. 66 class Heavy Cruisers|
|Date Of Design||1953|
|Date In Service||N/A|
|Gun Weight||52.5 tons (53.5 mt)|
|Gun Length oa||563 in (14.3 m)|
|Rate Of Fire||5.8 rounds per minute design|
|Projectile Types and Weights||AP and HE: 388 lbs. (176 kg)|
|Propellant Charge||206.13 lbs. (93.5 kg)|
|Muzzle Velocity||3,231 fps (985 mps)|
|Working Pressure||24.1 tons/in2 (3,600 kg/cm2)|
|Approximate Barrel Life||600 rounds 1|
|Ammunition stowage per gun||120|
- ^With such ballistics and working pressures, I would consider the life figure to be on the optimistic side.
|Weight||Rotating part of the turret: 656 tons (665 mt)
Total weight of the turret: 719 tons (730 mt)
|Elevation||-4 / +50 degrees|
|Rate of Elevation||11 degrees per second|
|Rate of Train||5.5 degrees per second|
|Loading Angle||+5 degrees|
- "Entsiklopedia Otechestvennoi Artillerii" (Encyclopedia of Fatherland [Russian] Artillery) by A.V. Shirokorad
Special help from Vladimir Yakubov