Igor Sikorsky's first monoplane, the S-7, combined wings, tail surfaces and landing gear from the S-6A with a new plywood-covered fuselage, and was powered by a 70hp Gnome rotary engine. Two persons sat side-by-side forward of the pilot, under the wing-brace pylons. Flown by George Jankovsky, it participated in the military competition until its landing gear collapsed during take-off from a ploughed field. After repair, it was used as a trainer in the summer of 1913 and then sold to the Bulgarian Army on the eve of the First World War.