The Walter Castor was a Czechoslovakian seven-cylinder, air-cooled radial engine for powering aircraft that was developed in the late 1920s.

The Super Castor was a nine-cylinder development.

[1] Castor I production began in 1928, Castor II in 1932 and the Castor III in 1934.

A preserved example of the Walter Castor engine is on display at the following museum: Data from Flight.,[2] L'Air 1 December 1929: Les Moteurs Walter[3] Comparable engines Related lists