Hirth HM 501 explained

The Hirth HM 501 was a 6-cylinder air-cooled inverted in-line engine that was developed by Hirth Motoren GmbH in the late 1930s, from the 4-cylinder HM 500 and used principally on the submarine-born Arado Ar 231.

Applications

• Arado Ar 231

Further reading

• Book: Nowarra, Heinz J. . Die Deutsche Luftrüstung 1933-1945 Vola.4 - Flugzeugtypen MIAG-Zeppelin . 1993 . Bernard & Graefe Verlag . Koblenz . 3-7637-5468-7 . German . 101, 108-109.