The Couzinet 100 was a three-engined, three-seat touring aircraft designed and built in France in 1930.
The straight part of the trailing edges were filled with long, narrow-chord ailerons carrying ground-adjustable trim tabs.
[1] Two of the 101's three 63 kW (85 hp), seven-cylinder Pobjoy R radial engines, enclosed in NACA cowlings, were mounted ahead of the leading edges on steel frames isolated on rubber blocks and toed outwards.
The enclosed cabin seated three in tandem, with the pilot at the leading edge between the engines and the two passengers behind.
Behind the cabin the fuselage curved upwards in Couzinet's distinctive way, the upper side narrowing to form a very broad-chord fin; its one-piece, almost triangular tailplane was built into the fuselage, carrying very narrow elevators.
The rudder had a rather pointed tip but was curved and full; extending down to the keel, it operated in a slight elevator cut-out.
When the Couzinet 100, powered by 34 kW (45 hp) Salmson 9 ADb radials made its first flight it had mainwheels in trouser fairings[2] and relied on low pressure tyres to absorb landing shocks.