Walter Mars I
| Mars I | |
|---|---|
| Walter Mars I powered DAR 4 trimotor c.1930 | |
| Type | 9-cylinder radial engine |
| National origin | Czechoslovakia |
| Manufacturer | Walter Engines |
| First run | c.1929 |
The Walter Mars I was a nine-cylinder, air-cooled, radial engine for aircraft use built in Czechoslovakia in the late 1920s.