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Image for FR7-420 Sirius7 7-Cylinder Radial 4-Stroke Engine from HorizonHobby
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FR7-420 Sirius7 7-Cylinder Radial 4-Stroke Engine
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Bore: 0.944 in (24.0mm)
Crankshaft Threads: UNF 3/8-24
Cylinders: Radial
Displacement: 0.607 cu in (9.95 cc) x7
Height: 9.0 in (230mm)
Plug Type: (7) Type F glow plugs
Prop Range: 22 x 10 - 26 x 8
RPM Range: 1,500-7,000 rpm
Recommended Fuel: Aircraft blend 5-10% nitro content with 8-10% lubricant content
Stroke: 0.866 in (22.0mm)
Total Weight: 6.98 lb (3.167 kg)
Width: 9.0 in (230mm)

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