Maxime Guillaume: Pioneering the Turbojet Engine

French inventor Maxime Guillaume filed a patent for a turbojet engine in 1921, predating other known attempts. Although his design was never built due to limitations in compressor technology, it marked a significant step toward jet propulsion.

French inventor (1888–?)

In aerospace, Maxime Guillaume (born 1888) was an agricultural engineer who filed a French patent for a turbojet engine in 1921.

The first patent for using a gas turbine to power an aircraft was filed in 1921 by Guillaume. ," French patent no. 534,801 (filed: 3 May 1921; issued: 13 January 1922). His engine was to be an axial-flow turbojet, but was never constructed, as it would have required considerable advances over the state of the art in compressors.