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Aviation History
1957
1957 - 1229.PDF
FLIGHT, 30 August 1957 Right, M.L. Utility Mk 1 during inflation and in flight. PowerplantSpan LengthGross weight Typical cruising speed Lycoming GO-480B43ft 6in 30ft3,050 lb 128 m.p.h. Drawing above and photograph below show E.P.9. M. L. AVIATION CO., LTD. White Waltham, Berks. Telephone: Littlewick Green 248 Utility Mk I This ingeniously contrived inflatable aircraft was described in some detail in Flight of May 31 last. On that occasion it was remarked, "In two years of development under M.o.S. contract the principle of the inflatable wing, originally conceived by the M.o.S. Research and Development Establishment at Cardington, appears to have been weli proven." The Utility Mk 1 is the second machine of the kind built and has a two-seat gondola-type open fuselage. The engine is a Walter Mikron. Cruising speed (35 h.p.) is 50 m.p.h. and stalling speed 30 m.p.h. Gross weight is 1,000 lb and wing span 35ft. EDGAR PERCIVAL AIRCRAFT, LTD. Stapleford Tcavney Aerodrome, Abridge, Essex. Telephone: Theydon Bois 2321 E.P.9 Orders for this robust agricultural and general-purpose aircraft have now been received from operators in Gt. Britain, Australia, Canada, New Zealand, Germany, Algeria, Libya and Vietnam, and have been delivered at the time of writing. Aside from its primary agricultural role, the E.P.9 can be used as a six-seat passenger transport, as a light freighter, an ambulance, a photographic and survey aircraft, or a military liaison machine. A floatplane version is planned. The fuselage structure is of welded steel tubing, which material obviates the corrosive effect of agricultural fertilisers and sprays. A heavy tubular frame immediately behind the pilots' seats (the cockpit has dual control) takes the main wing spar and undercarriage loads. Of Edgar Percival design, the undercarriage can handle vertical velocities of 9ft/sec. Because of its long travel it is claimed to have better energy-absorption characteristics than many deck-landing gears designed for lift/sec. All types of spray equipment can be carried, and in the top-dressing role a ground crew of three can be transported in addition to the pilot and hopper.
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