FF-320 | | FS-200S-P SPECIFICATIONS:
- Displacement: 0.809 cu in (13.3 cc) x 4
- Bore: 1.091 in (28 mm)
- Stroke: 0.866 in (22 mm)
- Practical RPM: 1,800-8,500
- Output: 4.1 hp @ 8,000 rpm
- Weight: 77.3 oz (2,190 g)
- Requires: fuel; prop
- Includes: glow plugs; mount
- Recommended Props: 18x10, 18x11, 18x12, 18x13, 18x14, 20x8, 20x9, 20x10, 22x8 | The only ringed piston, "flat four" R/C engine available - Twin opposing cylinder design self dampens most vibration smooths operation for longer engine and airframe life and minimizes vibration related damage to radio gear
- Features pushrod overhead valves, seven ball bearings, propeller locknut assembly and firewall mount
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Engines 
