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#model airplane

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Vista de 9-cylinder Radial Engine Dummy for Model Airplane 1:5 scale

9-cylinder Radial Engine Dummy for Model Airplane 1:5 scale

A 9-cylinder radial engine dummy for model airplanes. The author reports an outer diameter of approximately 170mm and states it fits a 65mm spinner. The author notes it can be scaled up or down according to model size, having used it for a Samson Pitts 70e. The model includes holes for metal rods to represent valve pushrods; the author used aluminium welding filler rod for this purpose. Caution from the author: The gaps between the cylinders required blocking with balsa wood. The author states that if left open, air flows through the cylinders and causes the brushless motor to get very hot. Blocking the gaps from behind forces some air through the center hole, which the author reports cools the brushless motor much better.

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