Wright cyclone r -1820 engine
The Curtiss-Wright R 1820 Cyclone was a nine cylinder single row supercharged, air cooled radial piston engine that was produced from 1921 until the late 1950s by Curtiss-Wright, and under license by Studebaker, Lycoming and Pratt and Whitney in the US, as well as the M25 in the USSR, and the 9V by Hispano Suiza in Spain.
The R-1820 engines powered aircraft such as the Boeing B17, Boeing 307 Stratoliner, Curtis P-36 and the Douglas range of DC-2, DC-3. DC-5 and Dauntless.
The R-1820 engines powered aircraft such as the Boeing B17, Boeing 307 Stratoliner, Curtis P-36 and the Douglas range of DC-2, DC-3. DC-5 and Dauntless.
TECHNICAL DATA
Type Nine cylinder single row supercharged, air cooled radial piston engine
Length 47.8in (174mm)
Diameter 54.3in (1,378mm)
Bore and Stroke Bore 6.125in (156mm) and Stroke 6.875in (175mm)
Displacement 1,823 cu in (20.88L)
Dry weight 1,184lbs (537kg)
Valve system One inlet and one sodium cooled exhaust valve per cylinder
Supercharger Single speed General Electric centrifugal
Fuel system Stromberg downdraft carburettor
Oil System Dry sump, one pressure and one scavenge pump
Power output 1,000hp @ 2,200rpm at take off
Specific power 0.46hp/cu in
Compression ratio 6.45/1
Power to weight ratio 0.84hp/lb
Type Nine cylinder single row supercharged, air cooled radial piston engine
Length 47.8in (174mm)
Diameter 54.3in (1,378mm)
Bore and Stroke Bore 6.125in (156mm) and Stroke 6.875in (175mm)
Displacement 1,823 cu in (20.88L)
Dry weight 1,184lbs (537kg)
Valve system One inlet and one sodium cooled exhaust valve per cylinder
Supercharger Single speed General Electric centrifugal
Fuel system Stromberg downdraft carburettor
Oil System Dry sump, one pressure and one scavenge pump
Power output 1,000hp @ 2,200rpm at take off
Specific power 0.46hp/cu in
Compression ratio 6.45/1
Power to weight ratio 0.84hp/lb