| J-1 | |
|---|---|
| |
| Lawrance J-1 at the National Air and Space Museum | |
| Type | Piston aero engine |
| National origin | United States |
| Manufacturer | Lawrance Aero Engine Company |
The Lawrance J-1 was an engine developed by Charles Lanier Lawrance and used in American aircraft in the early 1920s. It was a nine-cylinder, air-cooled radial design.