• Rescue helicopter • Amphibious design • Mail service
After its succoss with the R-4, the USAAF issued a requirement for a larger machine which was able to carry out tasks such as observation duties. Vought-Sikorsky’s Model 327 was designed to meet the new specification and shared the R-4*s basic layout. However, it was an entirely new design and seated two crew in tandem in a more streamlined fuselage. Sikorsky went on to dovolop the S-51 civil helicoptor from the R-5.
▼ Airborne angel
The Sikorsky S-51 saved hvos by ensuring that casualties received medical attention quickly. This example carries fwo wounded men to a held hospital.
A Early days
With the fuselage panels removed for an engine test tho small sue of the R-5 is readily apparent.
Crop sprayer ►
Seen displaying an unusual rig for spraying crops, the S-51 saw widespread civilian service as an air ambulance and work-horse.
A Cross-deck operations
Returning an admiral to his ship, an S-51 lands precariously on a gun turret.
Staying afloat ►
A US Coast Guard H-5 sits on the water with emergency floatation bags inflated.
FACTS AND FIGURES
>• Westland built the R-5 undor licence in Britain as tho WS.51 Dragonfly, for the RAF, Royal Navy and civil operators.
>• Nine H03S-1s wore used by tho US Coast Guard as H03S-1Gs.
>• H03S-1s sorvod with distinction In tho Korean War with Squadron HU-1.
> In 1950 Sikorsky built and testod a single XH03S-3 with a redesigned rotor head and blades.
> Two XR-5A* woro fitted with British instruments to an RAF requirement.
> Tho R-5B. R-5C and H03S-2 were planned variants later cancelled.
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R-5B
Type: !wo-/1oui-seat млеив and utility helicopter
Powerplant: one 336kW (-tbO hp) Pmft & Whitney R-985-AN-5 rodof piston ongine
Maximum speed: 171 knvTt (106 m. p.n j; cru. smg speed 137 knVh (S5 m. p.h. l
Initial climb rate: 3048 m <1.000 ft»m 15 min
Range: 679 Km (360 ml.)
Service ceiling: 4390 m <14.400 ft) with. in operational load
Weights: empty 1715 kg (3.78t lb ); take-ori 2189 kg (4.826 lb.|
Dimensions:
main rotor diameter 14.63 m (48 It.)
length 17.4 m (57 ft.)
height 3.96 mp3 It.)
rotor disc aiea 168 15 m’ (1.810 sq. 11.)
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Left: The H-5. seen hero returning after a rescue, was the pnmary SAP helicopter for the USAF throughout the 1950s and rescued both servicemen and civilians.
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wheel’pontoon landing gear.
The US Navy took delivery of lliree K-5,n. designated M02S-ls, in late I9i5. and later ordered I lOAS-Is. equivalent to the H-5.F Althougli ofiiclally designated as observation aircraft, they performed а ШІШІ7СГ of tasks.
Examples wen? also Ixnlt under license by Westland in Britain and served with the Fleet Air Ann and the RAF’ In Royal Navy service tlie helicopters ojXT. ilod as plane-guards’ living from aircraft-carriers.
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Above: The first amphibious helicopter (or US service, the new wheol/float combination of tho Sikorsky design greatly improved its capabilities.
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oprt provided imodeOon tor two crow • tandem. ЕхоовиМ watotoy ’ ntod to tho pnat whch was ir search and rescue won.
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manoeuvring in the hover, a fact that many dowrod cn>w came to xmrooalo
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The tuscMge war. at an at ftwtal design wtvch ottonxl a mcior rnprovbmanl oM>r (ho
OOtHX tjtJOC CUVOftXl SkccsXy R-4 The design лае to того iea? Jam to the tvemooso. ллгіі was veal аз the nebxptet was soon operators in a war гопа
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undercarriage was metaled on tre netoxiler :a vtWbfi Поза couU be attached tor ГВ6С0Э work over wntai
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Sikorsky’s rescue helicopters
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■ SIKORSKY HU5-1A; Operating over water, many helicopters were fitted with floats to a*ow landngs on the sea. Tbs proved mvaluaWe during rescue work. Though highly effective, tho uso of tioats rosultod m a loss in performance and many operators did not use the extra capability.
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■ SIKORSKY H-19:
Continuous development of live heticoptiy fleet saw the Н-1Э become ooo of the most successful early designs. Constructed under licence by Westland in Britain the helicopter was often seen rescuing people from tho sea. as illustrated here by this USAF oxampfo
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■ SIKORSKY HOSS-1: Dftvotoped shortly otter the S-51 tho H05S-1 ottered о larger cabin area to accommodate more peopte. Used alongside the S-S1 in the Korean War the type was used by both the US Navy and Marines. Alter Korea it was employed by the US Coast Guard
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M-HIRlIVnO HAS. Mil 7 7S$S kg (6,316 ft.)
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Sikorsky
