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Aviation History
1960
1960 - 1603.PDF
?HT, 2 September 1960 D.H.I23 No details of this project have been released. The broad concept is a small transport aeroplane with seating for about 30 people, with aircraft-mile (and hence seat-mile) costs of the same order as those achieved by old DC-3s. The project has been studied by a number of airlines who want to replace their DC-3s, but who consider that the alternative twin-Dart aircraft are too big and hence too expensive to operate for the light traffic flows that exist in so many undeveloped areas of the world. The D.H.123 would, in fact, be more of a true DC-3 replacement than the rather larger and more powerful turboprop designs that are on offer. Powerplant would be two de Havilland Gnome P.125O turboprops of 1,250 sJi.p. each. One design study is based on a high-wing arrangement. Comet 4 First model of the Comet 4 family, 19 are now in service with BOAC, who inaugurated the first transatlantic jet services with the Comet on October 4, 1958. Comet 4s are now operating on all BOAC's major trunk routes. Two more are on order for the corporation's associate East African Airways. The first export orders went to Aerolineas Argentinas, who ordered six in all. Powerplant comprises four Rolls-Royce Avon 524s (RA.29/1) jet engines of 10,5001b thrust each. The range/payload capabilities permit maximum 60-seat (first-class) payload of about 16,8001b to be carried for about 4,300 statute miles with reserves. With reduced payload and maximum fuel (8,900 Imp gal) the stage-length is only slightly more, since with its first-class payload the Comet is almost a "max payload, max fuel" aeroplane. Comet 4B This is the variant adopted by BEA, whose orders to date amount to ten aircraft of which eight have been delivered. It is a shorter-span, lengthened-fuselage variant for shorter range Continental-type operations. The Greek carrier Olympic Airways has ordered four Comet 4Bs, which are operated in consortium with BEA. Powerplant is essentially the same as the Comet 4. Maximum seating is 102, made possible by the 6Jft increase in fuselage length. Comet 4C This variant combines the longer fuselage of the Comet 4B with die wing and fuel tankage of the Comet 4. It is thus able to carry more payload than the Comet 4 at a slight sacrifice in maximum range. Orders for the Comet 4C have been placed by Mexicana (three delivered), Misrair (two delivered, one in production), and Middle East Airlines (four), and an RAF Transport Command purchase is imminent as we go to press. Powerplant of the Comet 4C is the same as that of the Comet 4, and the type is currently in production at Hatfield and Chester. Sea Vixen FA W.I Now in service as the standard Fleet Air Arm carrier-borne all-weather intercepter, the Sea Vixen is powered by two Rolls-Royce Avon 200-series engines and has tran- sonic performance and an exceptional rate of climb. The pilot sits to port and the radar operator lower and to starboard, both in Martin-Baker Mk 4 ejection seats. A comprehensive description and cutaway drawing of the Sea Vixen appeared in Flight for February 5. Equipment includes the latest GEC interception radar for search, lock-on, blind firing and other facilities, flight refuelling, Folded Sea Vixen Below, Sea Vixen stores de Hmilland Sea Vixen
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