Thomas Moy's tandem-wing monoplane "Aerial Steamer" was a machine of considerable size, having twin propellers each of six-foot diameter and a wing span of 15 feet. It was powered by a steam engine (built by Thomas Moy and Richard Edmund Shill) which developed 3 h.p. at 550 r.p.m. and had a tricycle landing gear. When tested in the great Crystal Palace in London, England, during June of 1875, the Moy Aerial Steamer managed to get up to 12 m.p.h. while running on a track. It did not generate enough lift to actually leave the ground but it was a fine effort which incorporated a number of design elements which saw later wide-spread use, such as the use of two propellers and the wheeled tricycle landing gear. The
In 1879 Thomas Moy built another monoplane, powered rubber bands, which he termed a "military kite." The model had 825 sq. in. of wing area. It was capable of rising from the ground under power... quite an accomplishment for the time.