curtisS-wright r-2600 cyclone engine
The Curtiss-Wright R-2600 Cyclone, also known as the "twin cyclone", was a two row fourteen cylinder, supercharged, air cooled radial piston engine developed by Curtiss-Wright and widely used in aircraft of the 1930s and 1940s.
In 1935, Curtiss-Wright began working on a more powerful version of their R-1820 single row nine cylinder Cyclone engine.
The R-2600 emerged as a 1,600hp engine that was meant to power the C-46 Curtiss Commando transport aircraft and was in fact installed in the prototype, but changes saw the adoption of the 2,000hp Pratt and Whitney R-2800 engine for the production aircraft.
However the R-2600 did power several WW2 military aircraft including the Douglas A20 Havoc, North American B25 Mitchell, Martin Mariner flying boat, Grumman TBF Avenger and the Curtiss SB2C-5 Helldiver.
In excess of 50,000 R-2600 engines were produced by a number of Curtiss-Wright plants around the US during WW2.
In 1935, Curtiss-Wright began working on a more powerful version of their R-1820 single row nine cylinder Cyclone engine.
The R-2600 emerged as a 1,600hp engine that was meant to power the C-46 Curtiss Commando transport aircraft and was in fact installed in the prototype, but changes saw the adoption of the 2,000hp Pratt and Whitney R-2800 engine for the production aircraft.
However the R-2600 did power several WW2 military aircraft including the Douglas A20 Havoc, North American B25 Mitchell, Martin Mariner flying boat, Grumman TBF Avenger and the Curtiss SB2C-5 Helldiver.
In excess of 50,000 R-2600 engines were produced by a number of Curtiss-Wright plants around the US during WW2.
TECHNICAL DATA
Type Two row fourteen cylinder supercharged radial piston engine
Length 62.06in (1,576mm)
Diameter 55.0in (1,397mm)
Bore and Stroke Bore 6.125in (156mm) and Stroke 6.312in (160mm)
Displacement 2,603 cu in (42.7L)
Dry weight 2,045lbs (930kg)
Valve system One inlet and one exhaust overhead valve per cylinder
Supercharger Single stage, two speed centrifugal - blower ratios-7.06/1(S), 10.06/1(H)
Fuel system Stromberg downdraft carburettor
Oil system Dry sump, pressured and scavenged
Power output 1,750hp @ 2,600rpm @ 3,000ft (975m)
1,450hp @ 2,600rpm @ 15,000ft (4,575m)
Compression ratio 6.9/1
Power to weight ratio 0.86hp/lb
Type Two row fourteen cylinder supercharged radial piston engine
Length 62.06in (1,576mm)
Diameter 55.0in (1,397mm)
Bore and Stroke Bore 6.125in (156mm) and Stroke 6.312in (160mm)
Displacement 2,603 cu in (42.7L)
Dry weight 2,045lbs (930kg)
Valve system One inlet and one exhaust overhead valve per cylinder
Supercharger Single stage, two speed centrifugal - blower ratios-7.06/1(S), 10.06/1(H)
Fuel system Stromberg downdraft carburettor
Oil system Dry sump, pressured and scavenged
Power output 1,750hp @ 2,600rpm @ 3,000ft (975m)
1,450hp @ 2,600rpm @ 15,000ft (4,575m)
Compression ratio 6.9/1
Power to weight ratio 0.86hp/lb