Shvetsov ASh-2

ASh-2
Type	Radial engine
National origin	Soviet Union
Manufacturer	Shvetsov OKB-19 in Perm'
First run	1946
Developed from	Shvetsov ASh-82

The Shvetsov ASh-2 was an 28-cylinder, air-cooled, radial aircraft engine designed in the Soviet Union in the late 1940s. It was inferior to the Dobrynin VD-4K engine and did not enter production. One of the problems was air-cooling which ate up to 50% of the total engine power at 15000 meters. In contrast, liquid-cooled VD-4K required only 5% of power for cooling at the same altitude.

Specifications (ASh-2)

Data from Kotelnikov, p. 252

General characteristics

• Type: 28-cylinder, 4-row radial engine
• Bore: 155.5 mm (6.122 in)
• Stroke: 155.0 mm (6.102 in)
• Displacement: 82.4 L (5,028 cu in)
• Dry weight: 1,850 kg (4,078 lbs)

Components

• Supercharger: single-stage, single-speed geared supercharger
• Cooling system: Air-cooled

Performance

• Power output: 3,500 horsepower (2,600 kW)