World of Warbirds on MSN

Rotary vs radial aircraft engines, the circular powerplants that changed early aviation

Part two of the Quest for Power series breaks down rotary and radial engines, why circular layouts solved cooling and reliability, and why they also came with nasty tradeoffs. From WWI rotaries to ...
insider.si.edu

Kinner K-5, Radial 5 Engine

Power rating: 74.6 kW (100 hp) at 1,810 rpm Displacement: 6.1 L (372 cu in.) Bore and Stroke: 108 mm (4.3 in.) x 133 mm (5.3 in.) Kinner Motors, Inc. succeeded California’s Kinner Airplane and Motor ...