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Aviation History
1957
1957 - 1630.PDF
718 FLIGHT AIRLINERS OF THE WORLD AW.65O FREIG Sir W. G. Armstrong Whitworth Aircraft Ltd., Baginton, nr. Coventry 1 Seat for supernumerary 2 Crew escape hatch 3 Leading-edge thermal de-icing ducts 4 Airflow from distribution duct in fuselage 5 Service door * Navigation light 7 Trim tab 8 Spring tab 9 Geared tab 10 Trim-cum-geared tab 11 Spring tab 12 Passenger door 13 Fairlead channels 14 Spring tabs 15 Trim-cum-geared tab 14 Geared tab 17 De-icing air outlets 18 Fuel-tank vent pipes 19 Tubeless tyres, wheels and Maxaret brakes 20 Oil cooler 21 Nacelle support struts from front spar 22 Jet-pipe 23 H.F. aerials 24 Heat exchanger 25 Four escape hatches 26 N.A.C.A. cooling-air intakes 27 Pitot head 28 Cupboard 29 Nineteen double-skinned windows, clamped into position 30 Nosewheel door fairing 31 Retractable ladder to flight deck 32 Radar scanner 33 Flying controls passed along in sandwich floor 34 S.E.P.2 autopilot 35 Crew compartment air-distribution duct 34 Duplicated pilots' controls 37 Elevator horn balance TERCOAC •VStLAQt SECTION BAGGAGE COMPARTMENT AND CREW TOILET IN FORWARD DOOR SIDEWAYS OPENING FREIGHT LOADING DOOR SECURED WITH "WING FOLD " LOCKS FUSELAGE AND FLIGHT DECK PRESSURISED TO S'5 Ib. <q. ilk REARWARD RETRACTING NOSEWHEEL FREIGHT FLOOR AT TRUCK BED HEIGHTA GOOD basic aircraft design, like a good musical theme, isenhanced by the variations which can be played upon it. That so many alternative versions of the A.W.A. Freighter-coach should have been put forward at this stage of the project is an indication of the versatility of the initial design. In autumn1955, Armstrong Whitworth were invited to submit a project study for a multi-purpose military transport with obvious civilapplications. Later, under the M.T.C.A. instead of the M.o.S., the projectbecame a predominantly civil one, backed as a private venture by the Hawker Siddeley Group. The result of an intensive marketsurvey showed that initially four well-proven Rolls-Royce Dart powerplants should be used, but it was decided also to profit fromthe low installed drag and efficiency of the Tyne to offer another version with this engine for longer stage-lengths. These versionsbecame respectively the AW.650 and 651, both with a twin-boom layout, a wing of well-proven merit and a pressurized fuselage ofapproximately circular section. Discussions quickly showed the possibilities of the type as a military freighter with an integralramp for dropping stores (AW.660), a similar version with Tyne engines (AW.661) and a further variant with an enormous unpres-surized double-deck fuselage, with a floor-level width of 174in, on which further changes could be rung. These are a car ferry whichwould accommodate six cars and 30 passengers, designated AW.670, or a short-range "air bus" with 130 seats, the AW.671.Another variant that has been considered is a fuselage based on the AW.650 configuration but reduced in length. The project is being tackled with appropriate intensity from theoutset. Two complete airframe test shells are being constructed, and work is in hand on three prototypes which are scheduled tofly from Bitteswell in October 1958, December 1958, and February 1959. These will be followed by seven pre-production AW.650sbetween April 1959 and March 1960. Described below is the basic long-fuselage, four-Dart-powered AW.650 now under construction. STRUCTURE The twin-boom configuration was a logical ARMSTRONG WHITWORTH A.W.450 Four Rolls-Royce Dart 524 (RDa.7/2), each rated at 2,100 e.h.p. Dimension!: Span, 115ft; length, 86ft 9in; height, 27ft; gross wing area, 1,450 sq ft; aspect ratio, 9.12: Hold: volume (gross), 3.680cu ft, (usable), 2,630cuft; floor area, 426sq ft; floor length, 46ft Sin; floor width, 10ft; clear interior height, 80in or more; floor height above ground (aircraft loaded), 4ft; min. dimensions of forward door, 100in by 80in; min. dimensions of rear door, 104in by 80in. Weights: Max. take-off, 82,000 Ib (76,000 Ib for initial C. of A. application); The Dart-powered AW.650 Freightercoach under construction at Baginton.
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