Hirth HM 501
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| HM 501 | |
|---|---|
| Type | Inline piston engine |
| National origin | Germany |
| Manufacturer | Hirth Motoren GmbH |
| Major applications | Arado Ar 231 |
| Developed from | Hirth HM 500 |
The Hirth HM 501 was a 6-cylinder liquid-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.