internal combustion engine

A drone equipped with an engine that uses explosive force to propel the aircraft many times faster than sound made its first successful flight at an airport in Gansu province.

Condoms, compasses, printers, phones, light bulbs ... are the most important inventions of all time by the expert group of Life's Little Mysteries magazine.

The internal combustion engine is a 'machine' with many auxiliary systems such as fuel system, cooling system, gas distribution system, booster system ...