Collector and craftsman Bill Gorman creates detailed, replica mini engines
This W-111 mini power unit is a replica of the engines that powered the John Deere Model D tractor. It was built from scratch by mini-engine enthusiast Bill Gorman.
Bill Gorman built this hit-and-miss mini engine of push rod design that runs like many larger small engines. Built from an old engineering plan, it has a bore of 1-1/16 inches, and a stroke of 2 inches.
Another of Bill Gorman's creations is this mini Loyal cycle design. It's a unique, two-cycle design that does all cycles above the pistons.
This Atkinson cycle mini engine, made by Bill Gorman, is designed to have all four cycles happen in one revolution instead of two. That gives it twice the power from the same displacement and the engine runs more smoothyl.