Both were twin boom, tractor biplanes, which began with equal upper and lower spans but were later modified into sesquiplanes.

The upper wing overhang produced by the sesquiplane modification was supported by extra parallel pairs of outward leaning interplane struts.

Each of these lower members, which supported the aircraft on the ground as skids, carried twin, rubber sprung landing wheels.

The broad chord tailplane was mounted a little below the upper girder member with a pair of round-cornered rectangular rudders above it.

Of these, one was sold in England and three others to China, all sesquiplanes; the Chinese aircraft had the more powerful 34 kW (45 hp) 6-cylinder Anzani radial engine.

[1] A Type D powered by a larger displacement 6-cylinder Anzani, producing 45 kW (60 hp), was delivered from Paris on 21 June 1912 by Guillaux to Mr Ramsay in London.