The Stahlherz engines were built by Otto Schwade (see) and were copies of the French Gnome (see).

-There was a small one with 7 cylinders that gave 80 CV and the other larger one with 14 cylinders resulting from the union of two engines, giving 160 CV.

-There were also nine, 18 and 36-cylinder engines, with 100, 200 and 400 CV respectively.