Technical data
Type Sikorsky-4
Function experimental
Year 1910
Crew 1
Engines 1*50hp Anzani
Empty Weight 260kg
Maximum Weight 360kg
Length 8.0m
Wing Span 9.0m
Wing Area 28.0m2
Speed ?
Ceiling 500m?
Range ?

S-4, I.I.Sikorsky

(57k b/w)The S-4 pictured here at an aviation exhibit at Kiev in April 1911. Courtesy of Carl J. Bobrow and the National Air and Space Museum;

The second in series of "S" aircraft. Aircraft performed well during straight flights, but the first attempt to make a circle ended with crash (December 1910).

Failure of 50 h.p. Anzani air cooled engine could have proved fatal for less experienced pilot. So for next model (S-5)

28k b/w as seen at "History of aircraft construction in the USSR", Vol.1 p.70

I.I.Sikorsky incorporated German built Argus engines.

Aircraft was restored. Its structure was strengthened, two control levers replaced by control wheel. Aircraft was presented at Kharkiv Aircraft Exposition in 1911.



Sources:
  • article(?) by Carl J. Bobrow found at RAP by A. Gretchihine and incorporated into this site.
  • "History of aircraft construction in the USSR", Vol.1 p.72-73;
  • 'Igor Sikorsky - The Russian Years' by K.N.Finne

  • Modified September 5, 1996 Back to
    Main Gate