The Avion II was the second primitive aircraft designed by Clément Ader in 1893. Most sources agree that work on it was never completed, Ader abandoning it in favour of the Avion III that had a financ
Ader's 1892 steam engine, called Zéphyr, developed for Avion II, on display at the Musée de l'Air et de l'Espace.
The Ader Éole, also called Avion, was an early steam-powered aircraft developed by Clément Ader in the 1890s and named after the Greco-Roman wind god Aeolus.
Ader Avion II
…hp) at 480 rpm at a pressure of 15 Pa (0.00 psi), weighing 33 kg (73 lb) dry, and 134 kg (295 lb) with full boiler and accessories. Related development Ader Eole Aircraft of comparable role, configuration, and era Ader Avion III…
Clément Ader's Avion French patent 205155, 19 April 1890.