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Aviation History
1955
1955 - 0015.PDF
FLIGHT, 7 January 1955 15 AIRCRAFT INTELLIGENCE .-'T V "" ' \ A recent flight view of the Leduc 0.21 ramjet aircraft. A note appears on this page. U.S.A. Hughes XH-17. After being two yearsgrounded the great Hughes XH-17 single- rotor helicopter has taken the air onceagain. The U.S.A.F. has approved further testing of an anti-vibration measure, and itis reported that the craft has hovered for several minutes at about 25ft. Jacobs Helicopters. Formerly known asmakers of radial air-cooled engines, the Jacobs Aircraft Engine Co. is now engagedon helicopter development, and is reported to have negotiated for the building ofNapier Oryx gas producers (and possibly larger derivatives) under licence. TheModel 104, at present under development, has a Jacobs R-755-EH piston engine of350 h.p. Grumman S2F Transport. Now immi-nent are test flights with the first transport version of the Grumman S2F twin-engined anti-submarine aircraft. This model will be quickly convertible to canyeither eight passengers or more than 1,6001b of freight, and will replace the TBFAvenger torpedo bombers now used on the "codfish" airline, which maintains com-munications between aircraft carriers at sea and shore bases. France Leduc Developments. The French de-signer Leduc has announced that the first of his two prototype O.22 ramjet aircraftwill be flying during the early summer. The fuselage of this type will be longer and more cylindrical than that of the O.21,illustrated on this page, and the ramjet will develop a thrust of about 60 metric tons.It is hoped that this will enable the aircraft to maintain a constant Mach number dur-ing any evolution, but additionally there will be a S.N.E.C.M.A. Atar turbojetmounted in the middle of the body "to ensure take-off." The wings will be sweptback and will carry fuel tanks at the tips, the total fuel weight being 30 per cent ofthe all-up figure. The design Mach number of 2 should be maintained on the climb.According to M. Leduc, the most modern type of bomber, flying at 49,000ft, could beintercepted in less than three minutes— this time including the start-up and ground-run periods. S.O.1221 Djinn. Some impressive Alpineflights have been made by this little heli- copter. Carrying two persons, trips weremade between Mount Geneva and the summit of Mount Chaberton, which is over9,800ft high. Under official observations the Djinn took off easily under standardconditions with a total load exceeding 1,540 lb, which means that it is able tocarry more than 125 per cent of its own weight. Breguet 901. This world-champion sail-plane has now been ordered into series production. Sixty machines will be pro-duced for French users, and numerous improvements will be incorporated, notonly to increase efficiency, but to lower the price. Plastics will be used for certain com-ponents. A small number of additional 901s will be built for export and shouldfind a ready market. Italy North American F-86K. April is thescheduled month for completion of the first Fiat-built North American F-86KSabre single-seat all-weather fighter. Addi- tionally, a "substantial number" of F-86Ksare being built for NATO countries at the Inglewood factory of North AmericanAviation Inc. Of these, 56 are destined for the Royal Netherlands Air Force. BOEING 367-80 (Model 707) (Four Prott and Whitney JT3L (J57) Span 129ft Sin Length 127ft 10in
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