The design was based on mounting two 6Q six-cylinder engines on a single crankshaft.

More than one third of production went to power the Caudron C.714 light fighter that fought in the early stages of World War II for the French and Polish Air Forces.

[5] The cylinders and pistons were made of forged steel and connected in pairs to an eight bearing crankshaft.

[7] Designed to be fitted to a range of aircraft, both civil and military, the engine was originally rated at 450 horsepower (340 kW) when first introduced in 1935.

[8] Of these, 120 powered the Caudron C.714 light fighter which served in World War II.