The du Temple Monoplane was a steam-powered aircraft made of aluminium, built in Brest, France, by naval officer Félix du Temple in 1874.

Several trials were made with the aircraft, and it is generally recognized that it achieved lift-off.

It was described by Dollfus as a "short hop or leap"; Flight International described the plane as having "staggered briefly into the air" – (from a combination of its own power and running down an inclined ramp)[1][2] It glided for a short time and returned safely to the ground, making it the first successful powered flight in history, though not the first self-powered one.

The aircraft used a very compact, high-speed circulation steam engine for which Félix du Temple applied for a patent on 28 April 1876.

The engine used very small pipes packed together "to obtain the highest possible contact surface for the smallest possible volume" [3] This type of boiler, which boils the water instantly, has come to be known as a flash boiler.