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-680 Rated at at 2,000 rpm. R-680B4E Rated at at 2,100 rpm.Bridgman 1988 R-680BA Rated at R-680E3A Rated at at 2,200 rpm. R-680-6 Rated at R-680-9 Rated at at 2,200 rpm. R-680-13 Rated at at 2,200 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 Travel Air 4000 Waco S Series

Specifications (R-680-E3A)

Lycoming R-680

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