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American WWII's aircraft

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Sikorsky R-5 / HO2S-1 / HO3S

The second helicopter designed by Igor Sikorsky for the military was the two-seat R-5. Various versions were developed, with about 65 examples total being produced for the USAAF, U.S. Navy, and U.S. Coast Guard. The first two examples tested by the Navy were designated HO2S-1, while the remainder of the Navy/Coast Guard R-5 derivations were called the HO3S-1. A four-seat version known as the S-51 was produced for the civilian markets, and many of these were used by the U.S. armed forces as well.

General characteristics R-5B
Primary function	Two/four-seat rescue helicopter
Powerplant	One Pratt & Whitney R-985-AN-5 radial engine
Thrust	450 HP		336 kW
Length	57 ft 1 in		17.40 m
Height	13 ft		3.96 m
Weight	empty	3,780 lb	1,715 kg
	max.	4,825 lb	2,189 kg
Speed	cruising	85 mph	137 km/h
	max.	106 mph	171 km/h
Ceiling	14,400 ft		4,390 m
Range	360 miles		579 km
Armament	None
Crew	Two

Source: David Hanson´s American Aircraft of World War II

Jirka Wagner