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Aviation History
1958
1958 - 0219.PDF
FLIGHT, 21 February 1958 229 DEPOT 700 is the destination of this de Havilland Canada Beaver which has been used by Sir Edmund Hillary and which, when it was photographed over Minna Bluff, was carrying supplies. experimental and standard electronic navigation aids on U.S. air-ways. Some 400 civil-airway facilities have to be checked every 120 days.The B-57s are being used at heights around 40,000ft to assess the effectiveness and accuracy of the standard aids for use by thebig jets. Each B-57 carries duplicated V.O.R. and Tacan, I.L.S., glide-slope and marker beacon receivers and full communicationsequipment—all by Collins Radio. Ground-position fixes accurate to within + 500ft are being obtained using two D.M.E. stationslocated about 90 miles apart. All Vortac ground stations are now also being surveyed on the ground to determine their exact positionin latitude and longitude. V.O.R. and Tacan signals received in the B-57s are analysed and recorded on oscilloscopes; and positionfixes are taken and calculated to an accuracy of one-hundredth of a degree in azimuth and one-hundredth of a mile. The main objectof the B-57 programme is to find out whether present ground aids are going to be suitable for jet airliners at high altitudes and, ifnot, what modifications should be applied. One of the first test programmes was made in conjunction withthe Vortac station at Phillipsburg, Pennsylvania. The B-57s are reported to have obtained geographical fixes at 40,000ft accurateto within + 500ft. Flight Recorders for Jet Transports TN accordance with a C.A.A. requirement, all large transport-*• aircraft flying above 25,000ft after July 15 this year will have to carry a flight recorder. Equipment of this type is to be manu-factured and sold by Lockheed Aircraft Service, Inc., under licence from the mechanical division of General Mills, Inc. Aircraft suchas the Lockheed Jetstar, Convair 880, Caravelle, DC-8 and Boeing 707 and 720 series will be so fitted. The recorder registers I.A.S., altitude, g, compass heading andtime on an aluminium-foil tape. Housed in a shock-resistant spherical shell of 14in diameter, it weighs 28.5 1b. Reels of 100ftof tape are moved through die recorder heads at six inches per hour by a motor geared to a clock escapement or governor. Aspring further provides enough energy to run the recorder for ten minutes after power failure. The tape, it is claimed, can with-stand lOOg shock, 2,000 deg F temperature for 30 min, and immersion in sea water for 36 hr. P.I and Scimitar Simulators FLIGHT simulators for both the English Electric P.I and theVickers-Supermarine Scimitar are being built at Aylesbury by Air Trainers (Link), Ltd. Extensive use is being made of D.C.computation, a technique which was originated by this company about eight years ago. A Vulcan simulator has already been builtand delivered to the Vulcan O.C.U. at Waddington and others are nearing completion. A Hunter installation is in service at Chivenor.Civil simulators already completed include those for the Eliza- bethan, Viscount 701 and 802, while one for the Vanguard, withmoving base, is being designed. The principle of the moving base, which became widely familiarin the traditional Link trainers, is fast regaining popularity because of the added realism of physical sensation which can be provided.Air Trainers are constructing Britannia-type trainers with moving bases; and similar machines for the Viscount have been orderedby T.C.A. and Capital. A number of attempts have been made to provide external visual references for simulators; and the companyis working on such devices also. BIG RIVER: Most powerful member of the Rolls-Royce "River" class of gas-turbine aero engines is the Conway by-pass turbojet. This photograph shows an RCo.ll, of the type now in production for the Handley Page Victor B.2, on a test-bed at Sinfin, Derby. The RCo.ll has completed a type-test at a declared initial rating of 17,250 Ib at the lowest specific fuel consumption yet recorded by any turbojet. MIG-17s of the Soviet Air Force (left) are seen in this recently received photograph. 'They are carrying auxiliary under-wing tanks. HELIBOAT: Below, a Vertol 44 afloat on the Delaware River at Phila- delphia, where it has been testing a combination of sealed fuselage and floats—to be supplied to civilian over-water operators.
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