Four cabane struts from the upper fuselage on each side braced the wing centre section.
[1] Its fuselage was largely wooden, with spruce longerons and ply skin, though the forward section, which contained the 130 kW (170 hp) Potez 9A radial engine, had metal bearers and removable metal sheet covering.
Fairings ahead of each gave protection from the slipstream and dual controls were fitted.
[2] In November the propeller had to be modified to meet homologation requirements, as Potez had initially underestimated the full power of their new engine, 145 kW (194 hp) at 2,100 rpm.
[6] Finally in March 1934 the factory testing was done[7] and the Potez 51 went to Villacoublay for official evaluation.