Kinner Motors, Inc. succeeded California’s Kinner Airplane and Motor Corporation, first experimenting with the three cylinder K-1 in 1921, and then producing the five-cylinder K-2 in 1927. In 1928, the Kinner K-3 five-cylinder, air-cooled radial engine was certificated. Early in 1929, Kinner started using a completely redesigned and improved cylinder, which was approved without certification. About the time that the improvements were put into effect, the engine became known as the Kinner K-5 Series 2. On April 29, 1930, it was given a rating of 74.6 kW (100 hp). A follow-on version, the Kinner K-5B was rated at 78.3 kW (105 hp). These were good engines, but had a reputation for heavy vibration, recognizable by their distinctive throbbing sound, which was unlike any other radial engine.

Among the K-5 powered aircraft were the Fleet Model 2, Waco KNF and KBA, Mono Aircraft Monosport 2, and Bird BK.

 Display Status

This object is not on display at the National Air and Space Museum. It is either on loan or in storage.
Object Details
Date Circa 1929 Country of Origin United States of America Type PROPULSION-Reciprocating & Rotary Manufacturer Kinner Motors Incorporated
 Physical Description Type: Reciprocating, 5 cylinders, radial, air-cooled 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.) Weight: 124.7 kg (275 lb) Dimensions Overall: 275lb. (124.7kg)
Other (on stand): 4 ft. 2 in. × 3 ft. 6 in. × 4 ft. 2 in. × 3 ft. 9 3/4 in. × 4 ft. × 4 ft. 2 in. × 3 ft. 6 in. (127 × 106.7 × 127 × 116.2 × 121.9 × 127 × 106.7cm)
Other: 2 ft. 8 1/4 in. (81.9cm)
3-D (Dimensions for Kinner K-5B): 81.9 × 116.2cm (2 ft. 8 1/4 in. × 3 ft. 9 3/4 in.)
 Materials Ferrous Alloy
Non-Magnetic Metal
Plastic
Unknown Coating
Cork
Paint
Rubber
 Inventory Number A19660458000 Credit Line Transferred from the U.S. Air Force Museum Data Source National Air and Space Museum Restrictions & Rights Usage conditions apply
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