| Technical data | |
|---|---|
| Type | S-18 |
| Function | Interceptor ??? |
| Year | 1916 |
| Crew | 2 |
| Engines | 2*150hp 'Sunbeam' |
| Length | 9.7m |
| Wingspan | 16.5/15.3m |
| Wing area | 58m2 |
| Empty weight | 1485kg |
| Loaded weight | 2100kg |
| Wing Load (kg/m2) | 36.2 |
| Power load (kg/hp) | 7.0 |
| Armament | |
| Guns | 1*mg |
S-18, I.I.Sikorsky
|
Large twin-engine biplane. Engines with pusher propellers were installed on the lower wing. Fuselage was covered with plywood.
Layout of a medium bomber, but intended as an interceptor. So gunner position was in the nose, and no rear defence were provided.
'Sunbeam' engines were a complete mess, and fully loaded aircraft failed to take off. Later it was flown successfully with four 80hp 'Gnome' in two tandems. As a result, aircraft came to service only in May 1917.
References:
- "History of aircraft construction in the USSR", Vol.1 p.177;
- S-XVIII, Sikorsky
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