Type: Reciprocating, 7 cylinders, single row, radial, air-cooled Power rating: 261 kW (350 hp) at 2,000 rpm Displacement: 13.0 L (794 cu in.) Bore and Stroke: Not available Weight: 259 kg (571 lb) ...

The Navy later sponsored a number of unconventional engine designs; however, few entered production. In the case of the 1939 XR-1740-2 development, the outcome was apparently typical of single-sleeve ...