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Aviation History
1960
1960 - 1624.PDF
348 Whirlwind HCC Mk S Gnome-Whirlwind Belvedere production Below, Belvedere cockpit Gross weight of the protoype Westminster is 33,0001b, of which 3,5481b is payload, assuming full 920gal fuel load. Sea-level ISA performance figures include: max speed, 135kt; max cruising speed, 130kt; economic cruising speed, lOOkt; max rate of climb, 2,350ft/min at best climbing speed of 75kt; hover ceiling, 9,000ft; max range (standard tanks), 200 n. miles. Gnome Whirlwind Powered by a 1,050 s.h.p. de Havilland Gnome H.1000 free-turbine engine, this helicopter has been developed from the piston-engined (Alvis Leonidcs Major or Pratt & Whitney R-1340) Whirlwind which, developed in turn from the Sikorsky S.55, is now in service with over 20 civil and military operators throughout the world. The use of turbine power gives greatly improved performance in high temperatures and at high altitude, and makes possible operations with realistic payloads in most parts of the world. A production order for the military version of the Gnome Whirlwind, designated the Whirlwind Mk 10, has recently been placed for the Royal Air Force. Still in production at Yeovil is the piston-engined Series 2 civil version. The basic weight-saving in the change from Leonides Major to Gnome has been quoted as 6751b, widi obvious improvements in consequence in performance and payload. As a freighter the Gnome Whirlwind can carry 2,0001b, either in the cabin or externally slung; as a transport it can accommodate eight civilian passengers or ten troops. Gross weight is 8,0001b, empty weight 4,6941b, and fuel capacity 179gal (standard) or 289gal (with auxiliary tank). Performance figures quoted for the civil transport version include: max speed, 95kt; economical cruising speed, 90kt; max rate of climb, l,200ft/min at best climbing speed of 50kt; vertical rate of climb, 230ft/min; hover ceiling, 7,000ft; hover ceiling (in ground effect), 14,500ft; service ceiling, 15,200ft; range, 245 n. miles (standard), 425 n. miles (with auxiliary tank); endurance (standard), 4|hr. Brimtol Division Belvedere Previously known as the Bristol 192, the Westland Belvedere tandem-rotor heli- copter is powered by two Napier Gazelle NGa.2 free-turbine engines of 1,650 s.h.p. each. A number are on order for the Royal Air Force, and tropical trials have recently been completed. The two Gazelles are mounted at either end of the main cabin, and a synchronizing shaft along the top of the fuselage permits one engine to drive both rotors if necessary. Should one engine fail the change- over to single-engine operation is completely automatic, and takes only 2scc. Full dual control is standard, and autopilot and autostabilizer equipment can be fitted if required. Roles envisaged for the aircraft include troop transport, carrying up to 19 fully equipped troops; freighting, carrying up to 6,0001b internaily or externally; casualty evacuation, carrying 12 stretchers and three seats; and rescue, in which role 18 people can be rescued in one sortie. Gross weight is 18,5001b and empty weight 11,3901b. Fuel capacity with standard tankage is 560gal and with auxiliary tankage l,080gal. Performance data include: max cruising speed, 120kt; max rate of climb, l,35Oft/min at best climbing speed of 60kt; vertical rate of climb, 385ft/min; hover ceiling, 7,600ft; hover ceiling in ground effect, 11,000ft; service ceiling, 17,300ft; max range (standard tanks) 400 n. miles, (auxiliary tankage, at military overload weight of 20,0001b) 680 miles. Fairey Aviation Division Gaimet AEW.3 The last production version of the Gannet, the AEW.3 is extensively modified to accommodate a large early-warning radar beneath the fuselage and is powered by the most power- ful version of the Bristol Siddeley Double Mamba. The AEW.3 can give early warning of aircraft and ships and carries a crew of three. A small number remain to be delivered; the first Fleet Air Arm squadron is at full strength. Rotodyne Largest of the new aircraft to come under the wing of the Westland company following its acquisition of the other British helicopter-producing firms during the past twelve months, the Rotodyne was originally conceived, constructed and developed by Fairey Aviation Ltd. Westland (Bristol) Belvedere
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