Tuesday, 24 May 2016

Tractor Clone

"Council of People's Commissars of the USSR
October 1945
Moscow, Kremlin

The Council of People's Commissars decrees that:
  1. The Caterpillar model D-7 tractor is approved for production at the Kirov factory in Chelyabinsk under the index Stalinets-80 (S-80).
  2. The Kirov factory is forbidden from making changes to the S-80 design, aside from changes necessary to begin production, and changes approved by the People's Commissar of Tank Production.
  3. The production quota for the S-80 at the Kirov factory in Chelyabinsk is 10,000 units per year by 1949.
  4. The People's Commissar of Tank Production (comrade Malyshev) and Central Planning must present the Council with a production plan and measures to aid in production of the Stalinets-80 (S-80) in 1946.
Chair of the Council of People's Commissars, I. Stalin
Affairs Manager of the Council of Commissars, Ya. Chadayev

Comparative characteristics of tracked diesel tractors D-7 and S-65
Tractor type
D-7
S-65
Nominal hp
Total power
92
82

Useful power
80
65
Drag hp
Total power
73
65

Useful power
61
50
RPM

1000
850
Gears
Forward
5
3

Reverse
4
1
Speed (kph)
Slow gear
2.25
-

1st gear
3.54
3.6

2nd gear
5.15
4.85

3rd gear
7.4
6.95

Fast gear
9.7
-
Towing force, kg



At nominal power
Slow gear
9690
-

1st gear
6100
5100

2nd gear
4100
3500

3rd gear
2700
2100

Fast gear
2060
-
At drag power
Slow gear
7600
-

1st gear
4800
4000

2nd gear
3200
2800

3rd gear
2100
1800

Fast gear
1600
-
Fuel consumption, g/hp-hour
210
220
Mass (kg)
Tractor
11,000
11,200

Engine
2000
2000
Ground pressure (kg/cm2)
0.5
0.5
"

CAMD RF 81-12086-265

The D-7 was adopted by the Red Army to tow even its heaviest artillery pieces.

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