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American WWII's aircraft
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Sikorsky R-6 / HOS-1
Following the success of the fabric-covered R-4 model, Sikorsky developed the type into the R-6. The R-6 retained the earlier machine's rotor and transmission system, but installed them in a streamlined fuselage with a semi-monocoque all-metal tail boom. The engine was replaced a 225 hp. Lycoming O-435 engine, an improvement over the R-4's 180 hp. engine. A total of 228 R-6s were produced, with those used by the U.S. Navy designated HOS-1, and those used by the British designated the Hoverfly II.
| General characteristics | ||
| Primary function | Two-seat observation and rescue helicopter | |
| Powerplant | Lycoming O-435 | |
| Thrust | 225 HP | 168 kW |
| Armament | None | |
| Crew | Two | |
| Number built | 228 | |
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Source: David Hanson´s American Aircraft of World War II
Jirka Wagner
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Last updated 01.10.2008