TechnoPower 5-Cylinder Radial Prototype Engine
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This prototype marked the beginning of a new line of 1/4 scale engines to power large model aircraft. The engine is about 13″ in diameter with a bore of 1.100″ and a stroke of 1.00″.
Technopower 7-Cylinder Radial Airplane Engine
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This Technopower 7-cylinder radial engine (SN B7-151) is 7″-long, 8″-wide, 7″-high, and weighs 2 lbs. 8 oz.
