an engine that uses the expansion of heated air to drive a piston
a small engine that uses compressed air to drive a piston
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
How to use air engine in a sentence
At their worst, these serious delays can include mid-air engine failures and unexpected airport diversions.
The first known air engine was invented by Sir George Cayley, in 1803.Great Facts | Frederick C. Bakewell
Showing compressed air engine and twin propeller with their control gear.The Submarine in War and Peace | Simon Lake
Such an apparatus constitutes a so-called "caloric" or hot-air engine.Every-day Science: Volume VI. The Conquest of Nature | Henry Smith Williams
Efforts have been made for fifty years to construct a hot-air engine that would compete with steam successfully.Every-day Science: Volume VI. The Conquest of Nature | Henry Smith Williams
At one time the steam-engine was threatened with serious rivalry by the hot-air engine.