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Aviation History
1954
1954 - 1481.PDF
648 ' De Havilland Comet 3 prototype. De Havilland Comet 2 (B.O.A.C.). Transport Aircraft* I9S4 • . . Over 70,000 lb (cont.) CANADAIR IV • Possibly because of its hybrid origin, the Canadair IV has never fully achieved the fame it deserves. It is not generally appreciated, for example, that it is the backbone of the two largest long-haul international airlines in the British Commonwealth—B.O.A.C. and T.C.A. In B.O.A.C. service the type is known as the Argonaut; the Corporation's first-class lay out is for 40 passengers and tourist versions carry 56. Like the British airline, T.C.A. operate 22 Canadairs, known as North Stars, which carry 48 passengers in domestic service and 40 on transatlantic routes. Dimensionally, and to some extent visually, the Canadair resembles the DC-4, but it does in fact embody a number of features developed for die DC-6, including stronger wings and undercarriage and a modified rear fuselage. Unlike the DC-4, it has a pressurized cabin, and the engines are British Rolls-Royce Merlin 724s. Canadair IV (four Merlin 724, total 7,040 h.p.).—Span, 117ft 6in; length, 93ft 7.5in; take-off weight 82,000 lb; wing loading, 55.1 lb-sq ft; take-off distance, 5,200rt; passenger capacity, 40-56; typi cal performance, 270 m.plh. for 2,600 miles at 18,000ft with 12,000 lb payload. DE HAVILLAND COMET 1 AND 2 • At the time of writing, the lustre associated with the name of die world's first jet airliner has been dimmed—only temporarily, it is hoped—by the series of three unexplained accidents which resulted in with drawal of Certificates of Airworthiness for Comets in airline service. The official grounding order applies to B.O.A.C.'s Comet Is and to Series lAs of U.A.T. and Air France. The Comet 1 is built to carry 36-40 passengers and was used on international routes in stages of up to 1,300 miles. The normal operating height is 36-40,000ft and the four Ghost turbines give a cruising speed of up to 490 m.p.h. The Comet 2 differs essentially in being powered by more efficient Avon 503 axial-flow turbojets of much greater thrust, and in having a longer fuselage, accommodating up to 44 passengers. Its performance, in terms of range, is greatly improved: 2,200 miles is a conservative estimate of the maximum stage-length with full load. More than 30 Series 2s are on order. Comet 2 (four Avon, total 28,600 lb s.t.).—Span, 115ft; length, 96ft; take-off weight, 115,000 lb; wing loading, 59 lb/sq ft; take-off distance, 7,000ft; passenger capacity, 44; typical performance, 500 m.p.h. for 2,200 miles at 40,000ft with 13,450 lb pavload. Douglas DC-6 (S.A.S.). Douglas DC-6A (American Airlines).
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