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Aviation History
1954
1954 - 1490.PDF
FLIGHT, 21 May 1954 655 Transport Aircraft • 1954... 12,500—70,0001b tics obtainable in the absence of the engines, drives and couplings as usually mounted in the fuselages of large helicopters. Capable of carrying upwards of 40 passengers with full baggage allowance, the Rotodyne will be of the size and power called for by B.E.A.'s specification for a large inter-city helicopter. The end-loaded, unrestricted fuselage will also accommodate cars or freight. Official belief in the potentialities of the Rotodyne was expressed by the placing, last July, of a Ministry of Supply order for construction of a prototype. Rotodyne (two Elands; total 6,300 h.p.).—Rotor dia. 90ft; wing span 47ft; take-off weight, 31,0001b; disc loading, 4.2 Ib/sq ft; passenger capacity, 40; typical performance, 200 m.pji. for 290 miles with 13,000 lb payload. FOKKER F.27 FRIENDSHIP • Designed primarily to replace the DC-3, die Friendship was the first twin-turboprop airliner to reach the construction stage. With Government sup port, two prototypes are being built in die Fokker factory at Amsterdam. From the viewpoint of flight safety special advan tages are claimed for the Friendship: auxiliary pneumatic power system has been chosen, all fuel is contained in the outer wings and the standard cabin arrangement (24-36 seats) features rear ward-facing seats. The fuselage is pressurized to give a cabin pressure of 8,000ft at a cruising height of 20,000ft, although it is doubtful if this height will be attained over the normal stage-distance of 300 miles. Friendship (two Dart RDa6; total 3,380 e.h.p.).—Span, 95ft; length, 73ft; take-off weight, 32,630 lb; wing loading, 43.3 lb/sq ft; take-off distance, 3,800ft; passenger capacity, 24-36; typical performance, 260 m.p.h. for 300 miles with 9,535 lb payload. HANDLEY PAGE (READING) MARATHON • Union of Burma Airways are at present die only operators of this 18-22- seat feederliner. Until recendy, six were in service with West African Airways Corporation, but these have now been placed on the market, with low total hours. Marathon (four Gipsy Queen 70-30; total 1,360 h.p.).—Span, 65ft; length, 52ft lin; take-off weight, 18,250 lb; wing loading, 36.7 lb/sq ft; take-off distance, 3,000ft; passenger capacity, 20; typical performance, 167 m.p.h. for 810 miles at 8,000ft with 4,260 lb payload. HUREL-DUBOIS H.D. 32 • In at least one respect the H.D. 32 has a clear lead over odier transports aimed at the DC-3 replacement market—me ability to lift larger payloads tiian the DC-3 from smaller fields. Air France have placed a firm order (for 24) and other operators are likely to follow suit. Unusual features of the H.D. 32 are, of course, the unusually high aspect- ratio of its externally braced wing and the sturdy fixed under carriage designed for use from grass strips. It employs well- proven Twin Wasp engines, as fitted to the DC-3. One prototype H.D. 32 has flown; the basically similar H.D. 31 (illustrated) has 800 h.p. Wrights. HD32 (two Twin Wasp R1830-92; total 2,400 h.p.).—Span, 148ft 7in; length, 76ft 4in; take-off weight, 39,672 lb; wing loading, 36.8 lb/sq ft; take-off distance, 2,380ft; passenger capacity, 42; typical performance, 168 m.p.h. for 1,240 miles at 10,000ft with 8,820 lb payload. ILYUSHIN IL-12 • Standard equipment of the Russian, Polish and Czech airways. Aeroflot, die Soviet national airline, use the type almost exclusively over all stage-lengms up to at least 1,000 miles; this must require at least 100 aircraft, forming the largest fleet in the world of one type. Although of post-war Hurel-Dubois H.D.31 prototype. Ilyushin 11-12 (Aeroflot). design, as indicated by the nosewheel undercarriage, the 11-12 has an unpressurized fuselage. J1-J2 (two Ash-82 FNV; total 3,550 h.p.).—Span, 104ft; length, 69ft llin; take-off weight, 38,000 lb; take-off distance, 2,700ft; passenger capacity, 30; typical performance, 210 m.p.h. for 1,240 miles at 2,000ft with 8,000 lb payload. MARTIN 2-0-2 and 4-0-4 • Comparatively little known outside the United States, the 2-0-2 and 4-0-4 are nevertheless among the most numerous of post-war transports. The 2-0-2, an unpressurized 40-seater, was in fact die first post-war American airliner to be certificated, but the type suffered a number of set backs early in its airline career and most of the market—particu larly overseas—was won by its competitor, die Convair 240. About 25 2-0-2s are employed on American domestic routes. The considerably improved Model 4-0-4 has a pressurized cabin and better payload capacity. Eastern Air Lines have a fleet of 60, and 40 more are used on T.WA.'s domestic services. Manin4-0-4(two Double Wasp R-2800CB16,total 4,800 h.p.).—Span, 93ft 3in; length, 74ft 7in; take-off weight, 44,900 lb; wing loading, 52 lb/sq ft; take-off distance, 4,360ft; passenger capacity, 44; typical performance, 255 m.p.h. for 900 miles at 15,000ft with 9,000 lb. Martin 4-0-4 (Trans-World Airlines).
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