[1] The Delannne 11 was initially powered by a five-cylinder, air-cooled 48 kW (65 hp) Salmson 5A radial engine in the nose, fed from tanks in the wing centre section.

A high long canopy dominated the upper fuselage, occupying about 40% of its length and enclosing two side-by-side seats, with baggage space behind them.

The glazing was unusually free of frames, with just three rectangular glass panels on each side and a smaller, triangular window immediately behind the windscreen.

[2] The wheels were on bent split axles mounted on the centreline of the fuselage underside, their ends rubber sprung from vertical V-struts from the wing centre section.

[8] At the end of June 1929 the Delanne 11 was displayed at the IIe Concours International d'Avions légers (Second light aircraft competition) in Rotterdam.