A total of 50 M.11A and M.11B Whitney Straights were built and a single M.11C prototype, fitted with a de Havilland Gypsy Major II engine and variable-pitch propeller, was tested.
A total of 50 M.11A and M.11B Whitney Straights were built. A single M.11C prototype, fitted with a 145 hp de Havilland Gypsy Major II engine and variable-pitch propeller, was tested.