| In mid-summer 1912, the Russian Imperial Navy ordered the first of a series of seaplanes from the RBVZ. To reduce the workload during preparations for the important army competitions, the numerically out-of-sequence S-5A was based on Sikorsky's S-6A, with a slightly smaller airframe, slender plywood-covered fuselage, twin floats and a 60hp Gnome engine. Underpowered, it was not accepted by the navy. In about March 1913, it was followed by this improved S-5A with a single main float, wing-tip stabilizing floats and an 80hp Gnome. The navy approved it for maritime reconnaissance, and sent it to its base at Revel in September 1914, after the outbreak of war.
 | A three-view drawing (1000 x 623) |
ENGINE | 1 x 60hp Gnome |
DIMENSIONS |
Wingspan | 12.0 m | 39 ft 4 in |
Length | 8.0 m | 26 ft 3 in |
Wing area | 30.0 m2 | 322.92 sq ft |
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|  COMPANY PROFILE All the World's Rotorcraft
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