Lycoming R-680

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 for use without cylinder air baffles.

Variants

 * R-680-B4E
 * Rated at 225 hp at 2100 rpm.


 * R-680-E3A
 * Rated at 285 hp at 2200 rpm.


 * R-680-13
 * Rated at 300 hp at 2200 rpm.

Applications

 * Beech AT-10 Wichita
 * Boeing-Stearman PT-13
 * Cessna AT-8/AT-17
 * Curtiss-Wright AT-9
 * Fleetwings BQ-2
 * Spartan NP-1
 * Stinson Airliner
 * Stinson Reliant
 * Stinson Vigilant
 * Waco S Series