Even during take-off from Istres on 18 October 1932, Marmoz noticed the aileron controls were slack, the ailerons themselves vibrated and there were large oscillations of the wings, with amplitude as much as 1 m.
It is a two-part aileron that can be deflected as a unit to provide roll control, or split open to act as an air brake.
The fuselage was constructed from welded steel tubing, with wooden wing spars from a J-3 Cub, the ailerons were made from 1929 Douglas O-38 rudders and the engine cheeks cowlings were made from Fairchild 24 wheelpants.
It had two-bay wings constructed of spruce and Ash, with ailerons on the upper wing and floats under the lower wingtips.