| Introduced
in 1942, the O-290 was a four-cylinder version of the
six-cylinder O-435. The
engine was also developed as a ground power unit (GPU). |
|
 | Horizontally opposed, 4 cylinder, piston engine |
| Air-cooled |
| Displacement: 289 cubic inches
(4.7 liters) |
| Bore x stroke: 4.875 x 3.875 inches |
|
