Sikorsky R-4

Utility Helicopter

United States | 1942

"The Sikorsky R-4 became the first widely-produced helicopter in aviation history, seeing 131 units in all."

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Power & Performance
Those special qualities that separate one aircraft design from another. Performance specifications presented assume optimal operating conditions for the Sikorsky R-4 Utility Helicopter.

1 x Warner R-550 piston engine developing 200 horsepower.
Propulsion

75 mph
120 kph | 65 kts
Max Speed

7,874 ft
2,400 m | 1 miles
Service Ceiling

Structure
The nose-to-tail, wingtip-to-wingtip physical qualities of the Sikorsky R-4 Utility Helicopter.

1
(MANNED)
Crew

33.5 ft
10.20 m
O/A Length

37.7 ft
(11.50 m)
O/A Width

12.5 ft
(3.80 m)
O/A Height

2,094 lb
(950 kg)
Empty Weight

2,646 lb
(1,200 kg)
MTOW

Variants
Notable series variants as part of the Sikorsky R-4 family line.

XR-4 - Single Prototype Model; fitted with R-500-3 series engine of 165 horsepower.

YR-4A - Developmental model with R-550-1 engine of 180 horsepower; larger-diameter rotor for improved lift; 3 examples completed.

YR-4B - Development model for formal US Army evaluations; 27 examples produced.

R-4B - Production Designation of R-4 series; fitted with R-550-3 series engines of 200 horsepower; 100 examples produced.

XR-4C - Prototype model with R-550-1 engine of 180 horsepower; revised rotor.

HNS-1 - US Navy designation of three YR-4B and twenty-two R-4B models.

"Hoverfly I" - British military designation of R-4 production model; 52 examples delivered.

S-54 - R-4B test platform with observer's position added.

Operators
Global customers who have evaluated and/or operated the Sikorsky R-4. Nations are displayed by flag, each linked to their respective national aircraft listing.

Total Production: 131 Units
Contractor(s): Sikorsky - USA

[ Canada; United Kingdom; United States ]

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Going Further...
The Sikorsky R-4 Utility Helicopter appears in the following collections:

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