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 |
Source: David Hanson´s American
Aircraft of World War II
Jirka Wagner
Copyright © All Rights Reserved