Sikorsky HO3S-1 Dragonfly

Pima Air and Space Museum Aircraft

Manufacturer
Sikorsky
Markings
United States Coast Guard, Coast Guard Station Brooklyn, New York, 1946
Designation
HO3S-1
Registration
N4925E
Serial Number
USCG 232

Sikorsky HO3S-1 Dragonfly

The Sikorsky R-5 was the second helicopter type to go into full production for the U.S. Air Force. The R-4 used in the last stages of World War II was primarily a trainer while the R-5 was intended for observation and rescue duties. The R-5 prototype first flew in August 1943. When the US 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. In 1946, the Dragonfly became the second helicopter to enter Coast Guard service under the Navy designation HO3S-1G. A total of 9 helicopters served from 1946 to 1959.

Specifications
Wingspan 48 ft
Length 41 ft 2 in
Height 12 ft 11 in
Weight 6,200 lbs
Max. Speed 90 mph
Service Ceiling 10,000 ft
Range 280 miles
Engines 1 Pratt & Whitney R-985-AN-5 450 hp
Crew 2