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SCRATCH-BUILDING A BRISTOL BULLDOG RADIAL ENGINE

My Bristol Bulldog Mk IIA project (see the November 2013 issue of Model Airplane News) all started with the acquisition of a powerful JPX 425cc twin-cylinder gasoline engine. Once mated to a homemade 44×14 hand-carved laminated beech propeller, it made the 47.3%-scale, 16-foot-span biplane possible. But, a proper round engine absolutely had to be replicated for the sake of the aircraft's scale looks and to minimize the appearance of the model's actual engine. So, the...
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