The Pacific War Online Encyclopedia
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National
Museum of the U.S. Air Force
The Wright
R-1820 Cyclone was
an air-cooled radial aircraft engine with nine cylinders. First
developed in 1931, but drawing on previous Cyclone series engines, it
used Heron-type cylinders with enclosed splayed valves and had an
integral supercharger and forged crankcase. It was one of the first
aircraft engines with provisions for a Hamilton variable-pitch
propeller. The bore diameter was f 6.125 inches (156mm) and the stroke
was 6.875 inches (175mm).
| Model |
Horsepower |
Wattage |
|---|---|---|
| 22 |
950 hp |
708 kW |
| 33 |
775 hp
(takeoff) 750 hp (5400 feet) |
578 kW
(takeoff) 559 kW (1650m) |
| 40 |
1200 hp (takeoff) 900 hp (14,000 feet) |
895 kW (takeoff) 671 hp (4300m) |
| 49 |
975 kW |
727 kW |
| 50 |
950 hp |
708 kW |
| 53 |
1000 hp |
746 kW |
| 56 |
1350 hp |
1000 kW |
| 65 |
1200 hp |
895 kW |
| G102A |
1100 hp |
820 kW |
| G205A |
1200 hp |
895 kW |
Aircraft using
the R-1820 included the F2A Buffalo,
F3F, F4F Wildcat, J2F Duck, SBD
Dauntless, A-28 Hudson, B-10 Martin, B-17 Flying Fortress, B-18 Bolo, Do-24, C.XI-W and O-47.
References
Gunston (2006)The Pacific War Online Encyclopedia © 2009 by Kent G. Budge. Index
