OS FT-120 Gemini
I have three of these engines. One is currently mounted in a Balsa USA J3 Cub and the other two are in waiting for the Nosen Cessna 310Q to be recovered. The one in the Cub is the later model and tagged "Gemini II" where the two matched engines are just plain "Geminis"
SPECIFICATIONS
Displacement: 0.607 x 2
Bore: 0.945 in
Stroke: 0.866 in
RPM: 2000-10,000
Output: 1.7 bhp @ 10,500 rpm
Weight: 38.4 oz