On each side there were two pairs of parallel interplane struts joining the spars, one outboard and the other passing through the fuselage between the centre sections.

[2] The fuselage was recycled from one of Caudron's earlier monoplanes, the very similar Types M and N, and was built around an ash lattice girder of square section which tapered to the rear.

The horizontal tail, narrow and with a straight, unswept leading edge was mounted on top of the fuselage so the rudder operated in an elevator cut-out.

Later in the year, the aircraft, now with the 100 hp Anzani and a modified upper forward fuselage, had a very different tail with a larger fin which had a long, curving leading edge, its contour continuing into that of a broad, deep rudder.

[2] The Type O had an all-steel tailskid undercarriage, with a pair of spoked mainwheels on split axles hinged from the centre of a transverse rod mounted on four longitudinal V-struts, arranged as an inverted W from the inner, under-fuselage interplane struts.