S-11 'Polukruglij' (Half-Rounded), I.I.Sikorsky
Development 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.
|Engines||1*100hp Gnome Monosaupape|
|Climb to 500m||6min 15sec|
|Takeoff/Landing||77m / 55m|