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Aviation / Aerospace


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

Specifications



Service Year
1942

Origin
United States national flag graphic
United States

Crew
1

Production
131
UNITS


National flag of Canada National flag of the United Kingdom National flag of the United States 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
RANGES (MPH) Subsonic: <614mph | Transonic: 614-921 | Supersonic: 921-3836 | Hypersonic: 3836-7673 | Hi-Hypersonic: 7673-19180 | Reentry: >19030


(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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