The Buscaylet-de Monge 7-5 was a twin engine, twin-boom aircraft without a fuselage but with pilot, passenger and fuel accommodated in a thickened wing centre-section.

The de Monge 7-5 was a development of the 1923 aircraft, retaining its configuration but with new engines and revised wings, tail, accommodation and undercarriage.

As before the centre-section contained two side-by-side seats but their cockpits were now separate and provided with windscreens and faired headrests.

A faired vertical leg with a steel tube core from near the edge supported the outer axle end on a rubber shock absorber.

In May 1926 Captain Cousin was preparing for an endurance record attempt, flying continuously between Paris and Rouen.

[6] In July 1926 the 7–5, sponsored by its propeller maker Lumière, was one of seventeen aircraft from six countries entered in the Concours d'Avions Economique, held in August.