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Aviation History
1946
1946 - 1486.PDF
Wing-root intakes to buried units, with outlets aft of the wing. t An expedient adopted in Germany : four units in twin nacelles. Aft/J FIG Focke-Wulf fighter which was to have two units, climb to 36,000 ft. in under 2% minutes and attain about 680 m.p.h. at sea level, at which height the endurance would be 13 minutes. At 36,000 ft. the estimated endurance was 43 minutes. This design was additional to a more adventurous project for a fighter in which three "wings" were rotated round the fuselage by small athodyds at their tips. The efficiency of this scheme was calculated to allow a range at sea level of 400 miles, or 1,500 miles at 46,000 ft. Such bold departures, however, are not embraced by the present study, the principal concern of which is the turbine- jet fighter. There is no occasion here to contribute to the axial-flow versus radial-flow gas turbine controversy. The radial-flow unit is now well established and for use in single-jet inter- ceptors, in which the weight of the power unit is of greater importance than fuel weight, it may challenge the new axial designs. The characteristically slim form of the axial will, nevertheless, become increasingly desirable, though a diameter of two feet may fail to produce more than 3,000-3,500 lb. thrust. A flying-wing with twin nacelles over Extending Range Endurance and range attainable with the pure jet are being progressively extended by the use of drop tanks, towed tanks and fuel-tight wings, and in any case seem to have proved less of a handicap than was originally feared, due in part to an increase in operational height, a condition particularly favourable to the turbine-jet. Having demonstrated its ability to operate without modification under desert and arctic conditions, the jet fighter is now in process of proving its aptitude for carrier use. Handling qualities up to the limiting Mach number are generally satisfactory, and provided that the S O M E P O S S
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