A nine cylinder radial engine. It's a faithful replica of an actual Pratt and Whitney Wasp Jr. aircraft engine. I've recently been in contact with the builder of this, and other motors,  he has a web site dedicated to miniature engines. He tells me that the motor is 1/4 scale, and measures 12.5 inches diameter overall.

Photo courtesy of Paul  Knapp

Pratt.jpg (55080 bytes)


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