This is Chevron Motor Corp, based in the state of New York.

-First they made an experimental 5-cylinder radial engine giving 100 hp.

-But their better known engines are two 7-cylinder radials.

-The A and A-L, models, which are only varying in compression ratio for the use of different gasolines.

"Chevron A"

-It is interesting to observe that the exhaust pipe from the lower cylinder is closer to the carburetor and that it is used for heating against icing.