It is a converted Ford Model A car engine that gave 52 HP (1925).

-As we can see, it is water cooled and has four cylinders. The main modification consisted in lightening the engine, changing parts of iron cast for aluminum.

"Corben-Ford"

From Appendix 9: Adaptation of a Ford type "A" car engine with some modifications to be used on the Corben Super-Ace aircraft in 1935.

"Corben, carburetor side"

-Among the modifications is the replacement of the Ford oil lubrication pump with a Chevrolet one.

"Corben, water pump side"

-The magneto goes directly on the crankshaft and the ignition is simple. The cylinder head also has its own design.

-(Information from AEHS).