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O.S. OS FR5-300 Sirius - L-OS37000 [L-OS37000]  
RRP: £2553.18
Our Price: 2,246.80 

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.

PLEASE NOTE: THIS ENGINE IS SPECIAL ORDER AND DELIVERY IS USUALLY 2-3 DAYS

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