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Pratt & Whitney R-1690-3
| Manufacturer | Pratt & Whitney |
|---|---|
| Popular name | Hornet |
| Configuration | 9-cylinder Radial |
| Power (standard) | 525hp |
| Power (takeoff) | 0hp |
| Production | 0 |
| Displacement | 27.7 |
|---|---|
| Bore | 0.1556 |
| Stroke | 0.1619 |
| Compression ratio | 6.0:1 |
| Diameter | |
| Length | 1.295 |
| Weight |
| Valvetrain | |
|---|---|
| Fuel system | |
| Fuel type | 87 octane gasoline |
| Blower | |
| Oil system | |
| Cooling | Air cooled |