Time was, when spark ignition engines available to aeromodellers were converted lawnmower engines and the like, in sizes that suited only really big model aircraft. It's all come a long way since then and the latest from Horizon Hobby will be particularly welcome because it is a true model aircraft engine in the style with which we are familiar. The EVOLUTION 10GX is a 10cc (0.60 cu.in) displacement unit that provides spark ignition performance for a typical 'club-field' size model aircraft which, or course, includes scale models. It features a capacitive discharge electronic ignition system that automatically controls the timing advance, to ensure that the spark arrives as just the right time throughout the rev. range. The engine features a front mounted pump carburettor that ensures a constant fuel feed with minimal risk engine 'flame-out', which supplied factory-set for ease of starting and reliability.
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