Kinner Airplane & Motor Corp was an airplane and engine manufacturer, founded in Glendale, California by Bert Kinner in the mid-1920s. Kinner's chief engineer was Max B. Harlow who went on to found the Harlow Aircraft Company. It went bankrupt in 1937 and the aircraft rights were sold to Timm Aircraft Co (see Otto Timm). The engine department was rearranged as Kinner Motor Inc in 1938, but folded in 1946. Kinner became the West Coast's largest producer of aircraft engines in 1941.
Kinner Sportster K-1 and B-1, 1933, with a 5-cylinder radial engine of 100 horsepower (75 kW) to 125 horsepower (93 kW). Became rather popular and sold in some dozen pcs. A few of them still flying. The Kinner K-5 and B-5 engines were also delivered to a wide variety of other aircraft manufacturers including Monocoupe, Waco, St. Louis Car Company, and Fleet. The design later evolved into the Security Aircraft Company Airster.
Kinner Envoy C-7, 1934 with 300 horsepower (220 kW) Kinner C-7 engine, with room for four persons. It was sold to private owner pilots and to the US Navy as XRK-1, and remained in use well into the 1940s. This was the last production model of the Kinners.