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Sikorsky S-11


Developed from the larger and heavier S-9, the S-11 Polukroogly (half-round) had a conventional wooden fuselage and 100hp Gnome Monosoupape engine. The pilot and observer sat side-by-side. A top speed of 100km/h, stalling speed of 70km/h and take-off run of 75m were good enough to gain the S-11 second place in the 1913 military competition for a reconnaissance aircraft; but it was not ordered into production.



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