O.S. FS 56 ALPHA FOUR STROKE

• Displacement: 0.569cu in (9.32cc)
• Bore: 0.945" (24.0mm)
• Stroke: 0.811" (20.6mm)
• Practical RPM: 2,400-13,000
• Weight: 14.8oz (419g)
• Crankshaft Size: 1/4-28
• Propeller: Sport & aerobatic; 13x6, 12x6-8
Scale; 13x6-7, 12x6-8