S-7, I.I.Sikorsky

(40k b/w) Courtesy of and the Archives, United Technologies Corporation;

S-7 monoplane was the second plane built by I.I.Sikorsky at the R-BVZ branch. Its construction included elements of S-6A and S-6B. Built for participation in 1912 military airplane contest.

(48k b/w) "History of aircraft construction in the USSR", Vol.1 p.93;

Due to landing gear damage, S-7 was dropped out of contest and later was sold to Bulgaria, where it saw action during WW-I.

• 'Igor Sikorsky - The Russian Years' by K.N.Finne
• "History of aircraft construction in the USSR", Vol.1 p.93;