Sikorsky R-4

Utility Helicopter [ 1942 ]

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

Authored By: Staff Writer | Last Edited: 05/11/2016 | Content ©www.MilitaryFactory.com

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Specifications

Service Year

1942

Origin

United States

Crew

1

Production

131
UNITS

Sikorsky - USA

(View other Aviaton-Related Manufacturers)

Canada; United Kingdom; United States

(OPERATORS list includes past, present, and future operators when applicable)

✓ Transport
General transport functionality to move supplies/cargo or personnel (including wounded and VIP) over range.

Length

33.5 ft
(10.20 m)

Width/Span

37.7 ft
(11.50 m)

Height

12.5 ft
(3.80 m)

Empty Wgt

2,094 lb
(950 kg)

MTOW

2,646 lb
(1,200 kg)

Wgt Diff

+551 lb
(+250 kg)

(Showcased structural values pertain to the base Sikorsky R-4 production variant)

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

Max Speed

75 mph
(120 kph | 65 kts)

Ceiling

7,874 ft
(2,400 m | 1 mi)

♦ MACH Regime (Sonic)

Sub

Trans

Super

Hyper

HiHyper

ReEntry

♦

(Showcased performance specifications pertain to the base Sikorsky R-4 production variant. Performance specifications showcased above are subject to environmental factors as well as aircraft configuration. Estimates are made when Real Data not available. Compare this aircraft entry against any other in our database or View aircraft by powerplant type)

None.

Supported Types

(Not all ordnance types may be represented in the showcase above)

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.

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