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OS O.S. Fr5-300 Sirius
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O.S. Fr5-300 Sirius - L-OS37000

This incredible 50cc, five cylinder radial engine closely follows full-size practice in its design and construction, including the use of a geared double-track cam ring to operate its valve gear. The Sirius features pushrod driven overhead valves, four ball bearings & two needle bearings, ringed pistons, a special inlet manifold assembly to balance the mixture distribution to the inlet pipes from the carburettor and a special propeller locknut assembly as standard. Supplied complete with a radial mount, the FR5-300 Sirius is ideal for large scale models and is designed to be used with 18 x 12~14 to 22 x 8 propellers.See the engine accessories at the end of this section for the optional front or rear exhaust collector rings specifically designed for this engine.
Bore:24.0mm (0.945")
Displacement:5x 9.95cc
Practical RPM:1,800 - 8,500
Propeller Range:18x12 18x14 20x8 20x10 22x8
Stroke:22.0mm (0.866")

Email me when availabe!Out of Stock
Part No: L-OS37000
Item Name: O.S. Fr5-300 Sirius
Brand: OS

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