Kirov Experiments, June 1941

"Report on completion of experimental works on armoured vehicles from May 20th, 1941, to June 20th, 1941

Object 220 (KV-3 base)

As of June 20th, the tank traveled 1979 km in total, 584 km after reassembly. The 850 hp V-2SN engine #2(1193-03) installed on May 30th worked for 27 h. 21 m. During trials, the following defects were discovered:

1. 3 sets of exhaust collectors burned up over the course of 284 km.
2. 4 final drive ferodo ribbons burned up. Cause: improper installation and adjustment.

As of June 12th, the existing defects are:

Kirov Factory Prototypes, March 1941

"Report on the progress of experimental tank armament work from February 20th to March 20th, 1941

Object 220 KV-4 100 mm

The experimental prototype is awaiting the arrival of the V-5 engine from the subcontractor factory. Assembly of the second prototype has not started due to a lack of finished parts. The factory already began producing parts for the second prototype. The parts are in the initial stages of mechanical production. Since the plants are highly loaded with mass production parts, it is likely that the full set of parts for the prototype will not be finished in March. The turret for the second prototype is currently at factory #92, where designers from both factories are working on installation of the gun and combat equipment.

Heavy Tank Costs

"To the Chief of the BTU, Military Engineer 1st Grade, comrade Korobov

Following decrees issued by the Government, the Kirov factory is building a series of experimental vehicles without having any contracts for them. Letter #6109 sent on November 15th, 1940, asked you to send these contracts. Letter #2239/s sent on February 20th, 1941, repeated the request. Nevertheless, we have not received any contracts from you.

I am sending you a report of the approximate cost of experimental works performed by the Kirov factory in 1941 regarding Objects ##150, 220, 221, 212, and KV-3, for the sum of 5,350,000 rubles in total. Please send us the information to issue bills regarding these projects.

Bargaining

"RE: contract for an electric mine clearing tank

Attachment to letter #6213

Notes from the Kirov factory regarding the electric mine clearing tank:

1. The estimated cost of completing the project is 1,500,000 rubles.
   This sum includes the tank (523,000 rubles), the generators (750,000 rubles), drafting of blueprints, laboratory work, production and installation of parts, testing the prototype, and repairs after trials.
   The sum specified in the draft of the contract (750,000 rubles) is insufficient and must be corrected.