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O.S. FR5-300 Sirius
by OS EnginesNormally: £2,559.99
Web Price: £2,227.19
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Note: Price matches will only be considered against valid, in stock products in the UK. Although we can match 99% of prices, some exceptions will apply. Full Terms
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.
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.
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Show BasketWhen a choice of colours is offered for a product, we will endeavor to fulfill your first request, but regret that this is not always possible and colours may vary on these items. Images are for illustration purposes only and whilst provided in good faith, may be incorrect. Prices quoted are valid for online purchases only and may be lower than those advertised in-store. E&OE. Currency conversions are given as an approximation only. All transactions will be processed in GBP. We advise you to research all part numbers before ordering to ensure compatibility with your model.