Sikorsky H-5

Sikorsky H-5
País	E.e.u.u
Papel	Helicóptero
Primer vuelo	18 de agosto de 1943
Construido	Más de 300

el Sikorsky H-5, (initially designated R-5 and also known as S-48, S-51 and by company designation VS-327) was a helicopter built by Sikorsky Aircraft Corporation. It was used by the United States Air Force, and its predecessor, the United States Army Air Forces, as well as the United States Navy and United States Coast Guard (with the designations HO2S and HO3S). It was also used by the United States Post Office Department. In December 1946, an agreement was signed between the British company Westland Aircraft and Sikorsky to produce a British version of the H-5, to be manufactured under license in Britain as the Westland-Sikorsky WS-51 Dragonfly. By the time production ceased in 1951, more than 300 examples of all types of the H-5 had been built.

Fuente: Sikorsky H-5 en Wikipedia

Sikorsky HOS3-1G Dragonfly Walk Around
Fotógrafos	Randy Ray
Localización	Museo del Aire de Evergreen
Fotos	20

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Sikorsky S-51 Helicopter Walk Around
Fotógrafos	Bill Maloney
Localización	Museo Americano de Helicópteros
Fotos	18

Westland WS-51 Dragonfly Walk Around
Fotógrafo	Bill Maloney
Localización	Unknow
Fotos	19

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Sikorsky H-5 Walk Around
Fotógrafo	Richard Bullock
Localización	Unknow
Fotos	20

The Dawn of Modern Rescue

el Sikorsky H-5 (originally designated the R-5) was the successor to the boxy, experimental R-4. It was designed to provide significantly more power, speed, and payload, making it the first helicopter truly capable of professional search and rescue (SAR) and medical evacuation missions. While its civilian counterpart, the S-51, was the first helicopter sold to a commercial user, the H-5 earned its legendary status in the rugged mountains of Korea, where it rescued hundreds of downed pilots and wounded soldiers.

Attribute	Technical Specification (H-5A / S-51)
Papel	Search and Rescue (SAR) / Utility / Medevac
Equipo	1–2 Pilots (plus 2–3 Passengers)
First Flight	August 18, 1943 (XR-5) / February 16, 1946 (S-51)
Planta motriz	1 × Pratt & Whitney R-985-AN-5 Wasp Junior radial
Horsepower	450 hp (336 kW)
Velocidad máxima	106 mph (171 km/h)
Main Rotor Diameter	48 ft (14.6 m)
gama	360 miles (580 km)

Engineering Milestones and Rescue Gear

The Rescue Hoist: The H-5 was one of the first helicopters to be routinely equipped with an external winch. This allowed crews to pluck pilots out of the water or deep jungle without having to find a landing spot.
External Litters: Because the internal cabin was cramped, the H-5 used aerodynamic “capsules” or open stretchers mounted on the outside of the fuselage. Wounded men were essentially strapped to the sides of the helicopter for transport to field hospitals.
Articulated Rotor Head: The H-5 utilized a three-bladed, fully articulated main rotor. This design allowed the blades to move independently (flapping and lead-lag), which significantly reduced vibration compared to earlier two-bladed models.
The “Double Control” Conversion: Early military versions had tandem (front-to-back) seating. Later modifications allowed for dual controls, making it an excellent trainer for the first generation of military helicopter pilots.

Operational History: “The Bridges at Toko-Ri”

The First Naval Rescue: In February 1947, a Sikorsky S-51 performed the first-ever helicopter rescue of a Navy pilot who had crashed into the sea during carrier operations, proving the “plane guard” concept.
Korea: The First Helicopter War: The H-5 (AF) and HO3S-1 (Navy/Marines) were the workhorses of the Korean War. They were the “angels” that pilots looked for when they went down behind enemy lines. Their success led directly to the formation of dedicated rescue squadrons.
Cultural Icon: The H-5 became a household name through the movie The Bridges at Toko-Ri, which accurately depicted the dangerous, low-level rescue missions flown by Navy pilots in the HO3S-1.
License to Britain: In 1947, Westland Aircraft in the UK licensed the design, producing it as the Dragonfly. This version used a British Alvis Leonides engine and served the Royal Navy and RAF for years.