Hirth HM 506

The Hirth HM 506 was a six-cylinder air-cooled inverted inline engine that was developed from the earlier four-cylinder HM 504. The HM 506 was a popular engine for light aircraft of the 1930s to 1940s and powered the Bücker Bü 133A model trainer. The engine featured a cast magnesium alloy crankcase.

Applications

 * Bücker Bü 133 A
 * Fieseler Fi 99
 * Fieseler Fi 157 (UAV prototype)
 * Fieseler Fi 158 (UAV prototype)
 * Gotha Go 241
 * Klemm Kl 35 B (D-ERLQ)