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Aviation History
1961
1961 - 1708.PDF
814 Commercial Aircraft of the World . . . Payload accommodation: Cabin volume, 4,412 cu ft; baggage andfreight volume, 620 eu ft: cabin length, 66ft iOJin (port side), 65ft 8in (starboard side); max width, lift 3iin; max height, 6ft 8in; max usablefloor area, 708 sq ft; largest door, 6"2jin x 28in; max scats, 100 at 34in pitch. Fuel capacity: 3.840 Imp gal, or 4,840 Imp gal with centre sectiontankage. Performance: Opt-cost cruising speed at 32,000ft and 100,0001b, 508kt(585 m.p.h.); corres fuel consumption. 7,3OOIb/hr; range A (max pay- load), 1.460 n.m. (1.680 st.m.) or 2.420 n.m. (2,790 st.m.) with centre-section tankage; range B (max fuel), 3,050 n.m. (3,520 st.m.) with 9,3251b payload; cruise M.875; VNO 36Okt (415 m.p.h.) EAS. D.H.121 Trident Mk 2 First referred to by Sir Roy Dobson of HawkerSiddeley in March 1960, this is a project-study for a stretched develop- ment of the basic short-range Mk 1 intended for the medium-rangemarket (2,000 miles-plus with max payload) at which the Boeing 727 is aimed. D.H.125 Originally known as the Jet Dragon when it was announcedin April 1961, though the name has in recent months been dropped, the D.H.125 is aimed specifically at the business and executive market. Thefirst aircraft is scheduled to fly in June 1962. A contract for 60 Viper 520s has been signed by de Havilland with Bristol Siddeley to power thefirst 30 D.H. 125s. The first aircraft has been ordered by Bristol Siddeley. first of all for engine development and later for executive use by thecompany. Deliveries of the D.H.125 are offered early in 1963. Basic price is £140,000: radar and radio would add about £25,000.Powerplant: Two Bristol Siddeley Viper 520 of 3,0001b static thrust. Dimensions: Span, 44ft; length, 47ft 6in; height empty, 14ft; wingarea, 324 sq ft. Weights: Max take-off, 18,5001b; max landing, 17,0001b.Payload accommodation: Cabin accommodational length, 19ft 6in; max internal width. 5ft lOin: max height, 5ft 9in; dimensions of largestdoor, 51 in • 36in; max number of seats, 8. Performance: Opt-cost (i.e., typical cruising speed) at 36.000ft.450 m.p.h.; take-off field length at sea level. 4.200ft: range A (max payload). more than 1,600 n.m.; cruise Mach number, 0.725. D.H.126 This de Havilland project for a 30-seat jet for the DC-3replacement market, powered by two turbofans. is understood to have been shelved for the time being. Ambassador The Airspeed A.S.57 Ambassador first flaw on July 10.1947 and entered service in 1952 with BEA, who named it Elizabethan. Until 1957. BEA was the only operator, but in that year three were soldto Butler Air Transport of Australia. Only 21 of these high-wing mono- planes were built, and today BKS Air Transport operate four, Dan-Airthree, Overseas Aviation four, Shell two, Rolls-Royce one (Tyne test bed). Four Elizabethans are at present in BEA storage awaiting sale at£69,500 each with zero-time engines and airframes. Powerplant: Two Bristol Centaurus 661s of 2,625 b.h.p. driving D.H.Hydromatic four-blade 16ft propellers. Data appeared in Flight of November 20, 1959, page 597. DE HAVILLAND AIRCRAFT OF CANADA Downsview. Toronto, Ontario, Canada. (Member of the Hawker Siddeley Group) DHC.4 Caribou The Caribou had its origin in design studies for a"Twin Otter" weighing 13,0001b, with two Otter-type powerplants and a fixed undercarriage. The Caribou's ultimate configuration was deter-mined by US and Canadian Army desires for rear loading, and the need for good STOL characteristics and climb after take-off, together with areasonable single-engined ceiling. The first of three proptotypes made its maiden flight on July 30, 1958, and the first of large batches ofAC-1A Caribous for the US Army was delivered on October 8. 1959. Production aircraft feature a 3ft 9in longer fuselage. Powerplant: Two Pratt & Whitney R-2000-7M2 Twin Wasps of1,450 b.h.p. each driving 13ft I in Hamilton Standard propellers. Data appeared in Flight for November 20, 1959, page 597. DE HAVILLAND AIRCRAFT PTY P.O. Box 30, Banks/own, A'5K', Australia. (Member of the Hawker Siddeley Group) DHA.3 Drover First flown on January 23, 1948, the Drover wasdesigned to Australian requirements as a post-war successor to the D.H.84 Dragon, with emphasis on simplicity (e.g., fixed undercarriage),ruggedness and a good performance with one engine inoperative. Only 20 Drovers were built, of which eight are in service with Fiji Airways,Qantas and TAA. The latter's Drovers are among six operated by the Royal Flying Doctor Service which have been re-engined with morepowerful Lycoming O-360-A1A engines driving Hartzell propellers in place of the three Gipsy Major Mk 10s. FLIGHT, 23 November 1961 <4 DE HAVILLAND D.H.121 TRIDENT "Flight" operators' reference drawing—see page 800 for key 5Z.91,- REAR FZEl6U-r iWLP- (§s Ilitte Transport Publications Ltd l%l 87 137*7 DOUGLAS The Douglas Aircraft Co, Santa Monica, California, USA. DC-3 The most famous and widely-used airliner ever built, the DC-3occupies a unique position in air transport. It is a twin-engined unpres- surized aeroplane capable of carrying 20-30 passengers on stages of upto about 1,000 miles at a cruising speed of about 170 m.p.h. It set entirely new standards in airliner design and operation which wereuniversally accepted and copied. The DC-3 is a development of the DC-1 and DC-2 (designed forTWA) which, with the Boeing 247 (designed for United), were the first airliners of the modern stressed-skin all-metal cantilever low-wingmonoplane formula. It made its first flight on December 22, 1935, having itself originally been designed to meet an American Airlines requirementfor a sleeper version of the DC-2 suitable for use on the longer trunk US domestic routes. However, it was the "Day Plane" model of the"Douglas Sleeper Transport" which became the DC-3. All told, a total of 10,928 DC-3s and military C-47s were built in the United Slates,in addition to about 2.000 under licence in Russia and 450 in Japan. Some 1,570 are still in service with 235 airlines—nearly as many as allother types of airliner taken together. The DC-3 in 1936 cost £18,000- £23.000 and resale prices today are around £25,000. Powerplant: Two Pratt & Whitney R-183O-92s of 1,200 b.h.p. drivingthree-bladed Hamilton Standard Hydromatic 1 lft 6in propellers. Dimensions: Span. 95ft; length, 64ft |in; height, 16ft lHin; wingarea, 987 sq ft. Weights: Max take-off. 25,2OOIb (US passenger), 26,9001b (USfreight), 28,0001b (UK); landing. 24,4001b (US passenger). 26.9001b (UK and US freight); no zero-fuel restriction; capacity payload, 5,3801b:weight less fuel and payload, 17,7201b. Payload accommodation: Cabin volume. 1,245 cu ft; baggage andfreight volume, 160 cu ft; cabin length, 30ft Ain: max width, 7ft 8in; max height, 6ft 7in; max usable floor area, 191 sq ft; dimensions oflargest door, 5ft lOin x 7ft (C-47); max seats, 28-36. Fuel capacity: 670 Imp gal (805 US gal).Performance: Cont cruising speed, 155kt (178 m.p.h.) at 10.000ft and 25,2001b; corres consumption 73.5 Imp gal/hr; balanced field length,max take-off weight. SL. ISA. 4.050ft; at SL. ISA - 15"C, 4.400ft; landing distance from 50ft. 1,980ft; range A (max payload), 173 n.m.(199 st.m,); range B (max fuel), 1,780 n.m. (2.505 st.m.); corres payload, 8.6001b; corres cruise speed, 155kt (178 m.p.h.). Typifying fashion in executive jets, the D.H.125 is powered by two rear- mounted Bristol Siddeley Vipers The DHC-4 Caribou combines STOL capabilities with a payload of 3% tons of cargo or up to 30 passengers
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