[2] The nacelle was a simple, flat sided structure with the 37 kW (50 hp) Gnome Omega rotary engine in the front.
There was a transversely mounted, cylindrical fuel tank behind the engine, its upper half visible at the front of the open cockpit.
Photographs show the B in its earliest form with two aboard, then later, after another tank had been fitted in the gap between the nacelle and lower wing, with three.
The European Circuit competition which started in June 1911 involved flights between towns in France, Belgium, the Netherlands and England.
He collected the Type B from the Caudron factory at Rue on 4 July and flew it via Calais to Brighton and Dover, destinations on the English part of the circuit.
It was a large three bay biplane with wings of unequal span and, uniquely for Caudrons of the period 1910-15, a conventional enclosed, full length fuselage.