Power your prized Giant scale plane with an O.S. Multi-Cylinder 4-Stroke Engine. The O.S. FF-320 (Nicknamed "Pegasus") is a Flat-Four Cylinder Engine. It is the ultimate in scale realism: abundant power, realistic noise levels, and scale appearance.

Includes: 

  • One Assembled FF-320 4-stroke Engine
  • One Set of Instructions, Decals, and Poster
  • One Choke Valve
  • Four Glow Plugs 
  • One Motor Mount
  • One Safety Prop Nut Assembly
  • One Glow Plug Extension Harness
  • One Spare Woodruff Key
  • Pushrod-Driven Overhead Valves
  • Ringed Pistons
  • Gear-Driven Camshaft
  • 5 -Crankshaft Ball Bearings
  • 2 -Camshaft Ball Bearings
  • Four Cylinders (flat, 2 opposing 2) Firing Order: 1-3-2-4
Construction
All aluminum and Aluminum alloys
Displacement
13.26 cc (x4) (.809 cu in x4)
Bore
27.7mm (1.091")
Stroke
22.0mm (.866")
Power Output
4.1 BHP at 8,000 RPM
Weight
2,190g (77.3oz) w/mount
Practical RPM Range
1,800 - 8,500 RPM
Length
181.5mm (7.15") from back of mount to front of drive washer
Width
196mm (7.72")
Height
80mm (3.15") from top of mount to bottom of mount. The carb extends 30-40mm farther down.
Distance from front-most edge of front header to drive washer
36mm
Crankshaft Thread size
5/16-24
Suggested Props
18x10, 18x11, 18x12, 18x13, 18x14, 20x8, 20x9, 20x10, 22x8
Needle Settings
High Speed 3-3.5 turns out from fully closed
Mixture Control (low speed)
Turn counter-clockwise until it stops, then 2 turns out
SKU OSM36410

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