| R-680 | |
|---|---|
| |
| Lycoming R-680 | |
| Type | Piston aero-engine |
| National origin | United States |
| Manufacturer | Lycoming Engines |
| First run | 1929 |
| Major applications | Beechcraft AT-10 Wichita Stinson Reliant Curtiss-Wright AT-9 Stinson Airliner |
| Produced | 1930-1945 out of production |
| Number built | over 26.000 |
The Lycoming R-680 is a nine-cylinder air-cooled radial engine, the first aero engine produced by Lycoming. The engine was produced in two types, the E and B series; both are essentially the same. The B4E was available in a trainer version with a front exhaust collector "ring" for use without cylinder air baffles. R-680 received Approved Type Certificate No. 42 on 4 Feb 1930.
