Working 7-Cylinder Radial Engine Model - Master Rod, Cam Ring, Pushrods, Valves, Hand Crank or N20

A working cutaway model of a 7-cylinder aircraft-style radial engine that you print yourself. Turn the propeller or the crank handle (or fit the optional N20 gear motor) and watch all seven pistons rise and fall on one master rod, the cam disc turn at one sixth of crank speed, 14 tappets and pushrods rock 14 rockers, and every intake and exhaust valve open and close in the real 4-stroke firing order 1-3-5-7-2-4-6. About 280 mm propeller, 214 mm across the cylinders, 304 mm tall on its stand, 12…

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