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Aviation History
1971
1971 - 2485.PDF
FLIGHT International, 18 November 1971 819 Hawker Siddeley Trident 3B By the end of September approximately half of BEA's Trident 3B fleet had been de livered and services throughout Europe are now well estab lished. It has been designed to meet the requirement for a high-capacity aircraft for medium/short-range routes. BEA has ordered 26 Trident 3Bs for delivery from 1971 onwards. This is the first Trident to have a lengthened fuselage (some 16ft 6in longer, applied both in front and behind the wing) and will seat from 130 mixed-class up to 171 all-tourist-class pas sengers. The three main engines are 11,9301b, 53kN-thrust Rolls-Royce Spey 512-5W/50s and there is a 5,2501b, 23-4kN- thrust Rolls-Royce RB.162 lightweight turbojet mounted at the base of the fin to provide extra take-off thrust. The excel lent thrust-to-weight ratio of the RB.162 (an engine developed originally for Vtol aircraft) reduces the take-off distance by some 1,800ft, 550m—or, alternatively the payload can be in creased by 14,5001b, 6,600kg. This is achieved by an increase Left, A recent Boeing 737 delivery was to Mey Air, the Norwegian carrier. Advanced versions of the type have now been certificated with the P&W JT8D-IS. Above, the Dassault Mercure has completed initial flight testing successfully. Certification is expected early in 1973 in thrust of 15 per cent for a total rise in engine weight of only about 5 per cent. A Garrett-AiResearch APU is fitted. Compared with the Trident 1 the 3B delivered to BEA car ries 60 per cent more payload for only 20 per cent more operating weight empty, and the range is 25 per cent greater. The primary structure is to be cleared for a minimum crack- free life of 20,000 flights of 90min each, and the expected useful life will be 40,000 flights of 90min each. In addition to the positioning of a booster jet and an APU (both in the fin) changes in the airframe include a 26 per cent increase in wing trailing-edge flap area and 35 per cent more lift-dumper spoiler area to preserve balanced field » yanywhere... including International airports •mm BAG' msB-Bumim475 BRITISH AIRCRAFT CORPORATION the most powerful aerospace company in Europe IOO PALL MALL LONDON SW1 BAC<
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