They were fabric covered and built around twin spars, both of which were ahead of mid-chord, leaving most of the length of each rib unsupported and free to warp for roll control.
[1] Instead of the nacelle and the twin booms that supported the empennage on the Type B, the Multiplace had a rectangular section, full length fuselage with the engine in the nose, built around four longerons and fabric covered.
There was a long, open cockpit for passengers and pilot, the latter sitting at the back under a little cut-out in the wing trailing edge for better upward vision.
These held the aircraft close to a take-off attitude on the ground and in this way replaced the lower members of the tailbooms used on other Caudron types of the time.
Flown by Allard and with the engine running roughly, the aircraft climbed to perhaps 12 m (39 ft) before, as an onlooker described, "rearing up" (se cobra), turning rapidly, catching a wingtip on the ground and nosediving in.