Sikorsky HO3S-1G Dragonfly

A picture of the Sikorsky HO3S-1G Dragonfly

The Sikorsky R-5 was the second helicopter type to go into full production for the U.S. Air Force.  The R-5 prototype first flew in August 1943.  When the U.S. Air Force became an independent service in 1948, the designation letter for helicopters was changed from “R” to “H” and the Dragonflies were redesignated H-4.  The Dragonfly was also adopted by the U.S Navy and the Coast Guard under the designation HO3S.  In 1946, the Dragonfly became the second helicopter to enter Coast Guard service under the Navy designation HO3S-1G.  They were used to develop techniques and equipment for using helicopters in Air-Sea rescue operations.  The success of the Dragonfly led to the expansion of the use of helicopters by the Coast Guard that continues today.  A total of 9 Dragonflies served the Coast Guard from 1946 to 1959.

Rotor Diameter

48 ft

Length

57 ft 2 in.

Height

13 ft

Weight

4,825 lbs (loaded)

Maximum Speed

90 MPH

Service Ceiling

14,400 ft

Range

280 miles

Engine

One Pratt & Whitney R-985-AN-5 with 450 horsepower

Crew

2

Manufacturer
Sikorsky

Markings
United States Coast Guard, Coast Guard Station Brooklyn, New York, 1946

Designation
HO3S-1G

Registration
N4925E

Serial Number
232

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