In 1918 the Anglo-American company Cosmos bought
Straker-Squire (also known as
Brazil Straker), a car and bus manufacturing firm which had branched out into aircraft engine repair and manufacture. This began by first reconditioning, then substantially redesigning and re-manufacturing
Curtiss OX-5 engines. Due to the quality of this work, they were the only company permitted to manufacture Rolls-Royce aircraft engines under licence, building
Hawk and
Falcon engines, major components for the
Eagle engine and also 600
Renault 80hp 8Ca engines. Over 1,500 engines were produced in total. The company was one of the first to be brought under
Admiralty control, and Fedden and his draughtsman Leonard Butler designed two engines during the war; the 14-cylinder Mercury and the larger, 9-cylinder
Jupiter. ==Aero-engine range==