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 "ring" for use without cylinder air baffles. R-680 received Approved Type Certificate No. 42 on 4 Feb 1930.

Variants

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


 * R-680BA
 * Rated at 240 hp


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


 * R-680-6
 * Rated at 245 hp


 * 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 L-1 Vigilant
 * Waco S Series