Tested in 1919, the Wibault WIB 1 was bested in official trials by the Nieuport 29

Flown in 1923, the Wibault WIB 3 was doomed by the failure of its engine exhaust-driven turbo-supercharger.

Flown in 1923, the Wibault WIB 3 was doomed by the failure of its engine exhaust-driven turbo-supercharger.

Powered by a Clerget rotary engine, the highly-unconventional Weyman W-1 was built at Villacoublay in 1915 and, predictably, achieved little success.

The Whitehead Comet, built late in 1916, appears to have been inspired by, but added little to, the successful Sopwith formula.