Sikorsky Helicopters

Sikorsky R-4 Hoverfly

Sikorsky R-4 Hoverfly


Sikorsky Helicopters


Sikorsky R-4 – ‘s Werelds eerste productiehelikopter (1940)  Sikorsky R-6 Hoverfly II

Sikorsky S-55 – Helikopter voor meerdere doeleinden (1949)  Sikorsky S-58 – verbeterde S-55 (1954)  

Sikorsky S-61 – Sikorsky CH-64 Skycrane –  CH-54 Tarhe “vliegende kraan” (1962)  

CH-53 Sea Stallion, CH-53E Super Stallion heavy lift helikopters (1964, 1974)  

Sikorsky S-70 – UH-60 Black Hawk – SH-60 Sea Hawk (1974) 
Sikorsky S-76 Spirit – 14-zits commerciële helikopter (1977)  

Sikorsky S-92 en de militaire Sikorsky H-92  Sikorsky X-2 •  Sikorsky S-97 Raider

Sikorsky Helicopters

The Sikorsky R-4 is a two-seat helicopter designed by Igor Sikorsky with a single, three-bladed main rotor and powered by a radial engine.

Goto Sikorsky Helicopters

Sikorsky R-4 Hoverfly

The Sikorsky R-4 is a two-seat helicopter designed by Igor Sikorsky with a single, three-bladed main rotor and powered by a radial engine. The R-4 was the world’s first large-scale mass-produced helicopter and the first helicopter used by the United States Army Air Forces,[1] the United States Navy, the United States Coast Guard and the United Kingdom‘s Royal Air Force and Royal Navy. In U.S. Navy and U.S. Coast Guard service, the helicopter was known as the Sikorsky HNS-1. In British service it was known as the Hoverfly.


Following the sinking in January 1944 of USS Turner, a Sikorsky R-4 flew life saving blood plasma for the casualties from New York. On 22–23 April 1944, U.S. Army Lieutenant Carter Harman of the 1st Air Commando Group conducted the first combat rescue by helicopter using a YR-4B in the China-Burma-India theater.[11] Despite the high altitude, humidity, and capacity for only a single passenger, Harman rescued a downed liaison aircraft pilot and his three British soldier passengers, two at a time.[12] On 22–23 January 1945, another rescue by the R-4 involved several legs for refueling and navigating through passes between mountains nearly 10,000 feet (3,000 m) tall, to reach a weather station located at an elevation of 4,700 feet (1,400 m).

Lockheed Transport


ManufacturerSikorsky Aircraft
DesignerIgor Sikorsky
First flightJanuary 14, 1942
Primary usersUnited States Army Air Forces
United States Coast Guard
Royal Air Force
Number built131
Developed fromVought-Sikorsky VS-300
Developed intoSikorsky R-6

Specifications (R-4 Hoverfly) Data from The Great Book of Modern Warplanes,

General characteristics

  • Crew: 2
  • Capacity: 1x casualty litter carried externally
  • Length: 48 ft 1 in (14.66 m) rotors turning
33 ft 8 in (10 m) fuselage only[citation needed]
  • Height: 12 ft 5 in (3.78 m)
  • Empty weight: 2,011 lb (912 kg)
  • Gross weight: 2,540 lb (1,152 kg)
  • Powerplant: 1 × Warner R-550-1 7-cylinder air-cooled radial piston engine, 185 hp (138 kW)
  • Main rotor diameter: 38 ft (12 m)
  • Main rotor area: 1,134 sq ft (105.4 m2)

Specifications (R-4 Hoverfly)



  • Maximum speed: 75 mph (121 km/h, 65 kn)
  • Cruise speed: 65 mph (105 km/h, 56 kn)[citation needed]
  • Range: 130 mi (210 km, 110 nmi)[citation needed]
  • Service ceiling: 8,000 ft (2,400 m)
  • Time to altitude: 8,000 ft (2,438 m) in 45 minutes


Related development

Aircraft of comparable role, configuration, and era

Aircrafttoaal encyclopedia

An air force, also known in some countries as an aerospace force or air army, is in the broadest sense, the national military branch that primarily conducts aerial warfare.