S-11 'Polukruglij' (Half-Rounded), I.I.Sikorsky


D
evelopment of the S-9. Smaller size, weight. Traditional fuselage structure. First modification was equipped with rigid control of ailerons - steel tubes inside the wing used to move them. Trials revealed that those ailerons are not efficient enough, so ailerons were replaced by wing twist.
Side-by-side cockpit, controls only from the left seat. On the Military Aircraft Contest in 1913 aircraft took second place.
Sources:
  • "History of aircraft construction in the USSR" by V.B.Shavrov, Vol.1 p.96-97;
  • Technical data
    Type S-11
    Function Reconnaissance
    Year 1913
    Crew 2
    Engines 1*100hp Gnome Monosaupape
    Length 7.6m
    Wing Span 11.6m
    Wing Area 26m2
    Empty weight 578kg
    Loaded weight 1005kg
    Wing load 38.6kg/m2
    Power load 10.0kg/hp
    Maximum Speed 102km/h
    Climb to 500m 6min 15sec
    Takeoff/Landing 77m / 55m
    Modified September 2, 1997
    by Alexandre Savine;
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