Lycoming test bed, later fitted with a Wright Whirlwind.

A version with a 175 hp (130 kW) Wright Whirlwind was considered under the designation M.30, but not built.

But Lindbergh knew the nine-cylinder Wright Whirlwind radial was extraordinarily reliable, and he trusted it - and himself.

The Wright Whirlwind had essentially the same lower end (crankcase, cam, and crankshaft) as the J-1.

Heron later moved to the United States where he worked on the design of the Wright Whirlwind.

For power they chose the Wright Whirlwind, which delivered 225 horsepower (168 kW).

This engine was air-cooled and called Wright Whirlwind.

The WB-2 follow-on aircraft, was made of fabric covered steel tubing was already in development to test the updated Wright Whirlwind J-5.

Initial prototype of this naval fighter powered by a Wright Whirlwind radial.

This latter aircraft was later refitted with a Wright Whirlwind of nearly double the power of its original powerplant.