1921: Gnome & Rhône purchases license for the Jupiter radial engine from Bristol Aeroplane Company of Britain.

1922: Gnome & Rhône is listed on the stock exchange.

1923: production of rotary engines comes to a halt with the Rhône 9Z.

1927: start of aeronautical business by a company which will become SFMA, then Messier (1933).

1927: Hispano-Suiza launches the HS 600 CV engine, which will make the first crossing of the South Atlantic the same year as powerplant of the "Oiseau-Canari" flown by Costes and Le Bris.