Barrel engine with six double cylinders giving 900 CV. It drives two contra-rotating propellers.

“G-C schematics”

-Each double cylinder has a crankshaft and the rotation is transmitted to the main shafts by bevel gears. Year 1938. (See G.C.).

From Appendix 12: This revolver-type engine with two contra-rotating propellers was installed on a Koolhoven fighter, as we can see below.

“Koolhoven FK 55 fighter”

-At times found as “Gedoux et Crouse”.

“Gadoux et Crouse cross-section”