1807 –
Nicéphore Niépce and his brother Claude build a fluid piston internal combustion engine, the
Pyréolophore and use it to power a boat up the river
Saône.
1824 –
Nicolas Léonard Sadi Carnot first publishes that the efficiency of a
heat engine depends on the temperature difference between an engine and its environment.
1837 – First American patent for an electric motor (U.S. Patent 132).
Late 1930s –
Hans von Ohain and
Frank Whittle separately build pioneering
gas turbine engines intended for aircraft propulsion, leading to the pioneering
turbojet powered flights in 1939 Germany and 1941 England.