O.S. FSa-72II - 4-Stroke 11.79cc Airplane Engine
Compact 70 size engine suitable for 2-stroke 46 size or 4-stroke 50-70 size planes.
Specs:
Displacement: 11.79cc
Output: 1.18hp @ 11.000RPM
Bore: 27mm
Practical RPM Range: 2.400-12.500
Stroke: 20.6mm
Weight: 476g