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Sikorsky R-4

Utility Helicopter

Sikorsky R-4

Utility Helicopter

OVERVIEW
SPECIFICATIONS
ARMAMENT
VARIANTS
HISTORY
IMAGES
Overview



The Sikorsky R-4 became the first widely-produced helicopter in aviation history, seeing 131 units in all.
National Flag Graphic
ORIGIN: United States
YEAR: 1942
MANUFACTURER(S): Sikorsky - USA
PRODUCTION: 131
OPERATORS: Canada; United Kingdom; United States
National flag of Canada
CAN
National flag of United Kingdom
UK
National flag of United States
USA
Technical Specifications



Unless otherwise noted the presented statistics below pertain to the Sikorsky R-4 model. Common measurements, and their respective conversions, are shown when possible.
CREW: 1
POWER: 1 x Warner R-550 piston engine developing 200 horsepower.
ADVERTISEMENTS
LENGTH

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SPEED (MAX)

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CEILING

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Armament



None.
Variants / Models



• 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.






Media







Our Data Modules allow for quick visual reference when comparing a single entry against contemporary designs. Areas covered include general ratings, speed assessments, and relative ranges based on distances between major cities.

Image of collection of graph types

Relative Maximum Speed
Hi: 100mph
Lo: 50mph
This entry's maximum listed speed (75mph).

Graph average of 75 miles-per-hour.
Aviation Era
Pie graph section
Pie graph section
Pie graph section
Pie graph section
Pie graph section
Useful in showcasing the era cross-over of particular aircraft/aerospace designs.
Unit Production (131)
Comm. Market HI*: 44,000 units
Military Market HI**: 36,183 units
131
131

  * Commercial Market High belongs to Cessna 172.

  ** Military Market High belongs to Ilyushin Il-2.


Altitude Visualization
Small airplane graphic
Supported Roles
A2A
Interception
UAV
Ground Attack
CAS
Training
ASW
Anti-Ship
AEW
MEDEVAC
EW
Maritime/Navy
SAR
Aerial Tanker
Utility/Transport
VIP
Passenger
Business
Recon
SPECOPS
X-Plane/Development
A2A=Air-to-Air; UAV=Unmanned; CAS=Close Support; ASW=Anti-Submarine; AEW=Airborne Early Warning; MEDEVAC=Medical Evac; EW=Electronic Warfare; SAR=Search-Rescue
Commitments / Honors
Military lapel ribbon for Operation Allied Force
Military lapel ribbon for the Arab-Israeli War
Military lapel ribbon for the Battle of Britain
Military lapel ribbon for the Battle of Midway
Military lapel ribbon for the Berlin Airlift
Military lapel ribbon for the Chaco War
Military lapel ribbon for the Cold War
Military lapel ribbon for the Cuban Missile Crisis
Military lapel ribbon for pioneering aircraft
Military lapel ribbon for the Falklands War
Military lapel ribbon for the French-Indochina War
Military lapel ribbon for the Golden Age of Flight
Military lapel ribbon for the 1991 Gulf War
Military lapel ribbon for the Indo-Pak Wars
Military lapel ribbon for the Iran-Iraq War
Military lapel ribbon for the Korean War
Military lapel ribbon for the 1982 Lebanon War
Military lapel ribbon for the Malayan Emergency
Military lapel ribbon representing modern aircraft
Military lapel ribbon for the attack on Pearl Harbor
Military lapel ribbon for the Six Day War
Military lapel ribbon for the Soviet-Afghan War
Military lapel ribbon for the Spanish Civil War
Military lapel ribbon for the Suez Crisis
Military lapel ribbon for the Vietnam War
Military lapel ribbon for Warsaw Pact of the Cold War-era
Military lapel ribbon for the WASP (WW2)
Military lapel ribbon for the World War 1
Military lapel ribbon for the World War 2
Military lapel ribbon for the Yom Kippur War
Military lapel ribbon for experimental x-plane aircraft
* Ribbons not necessarily indicative of actual historical campaign ribbons. Ribbons are clickable to their respective campaigns/operations.


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