1917 Clerget

Originally developed for use in a motorcycle by French inventor Felix Millet, the rotary engine was used sporadically for years until it was resurrected by brothers Louis and Laurent Seguin.

1917 Gnome

The Gnome, the first successful rotary aero engine, was invented by Laurent and Giles Seguin in 1907-08.

1917 Hall-Scott

Before WWI Hall-Scott of San Francisco and Curtiss of New York were the leading US producers of water-cooled engines.

1917 Liberty

The Liberty was designed to suit American mass production rather than the slow handwork used in Europe.

1920 Ford T Marine Conversion

As soon as gasoline engines suitable for marine use were available, conversion of automotive engines became popular.

1922 Anzani

Alessandro Anzani gained fame in 1909 when one of his engines powered Louis Bleriot's historic flight across the English Channel. The engine tended to overheat, but Bleriot flew into a rain shower and the engine got cooled off.

1926 Ford T Ice Saw

This modification of a Model T Ford chassis and engine again illustrates the adaptability of the Model T.

1935 Chevrolet Cutaway

This cutaway shows the inner workings of the six-cylinder engine that was, with changes in displacement, lubrication and cooling, the mainstay of Chevrolet from 1929 into the 1960s.

1940 Wright Cyclone

The Cyclone series of engines began with the P-1 of 1652 cu. in. displacement in 1923-24. By 1932 the Series F Cyclone 9 produced 575 hp from 1820 cu. in.