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Aviation History
1924
1924 - 0311.PDF
1 MAY 29, 1924 It is perhaps, superfluous to state that many other sections are used locally in the machine, but the foregoing should serve to give an idea of the main features of all-steel construction as developed by Bouton and Paul. As already mentioned, it is not possible to describe the latest types of Boulton and Paul machines, but a brief reference may be made to the " Bodmin," which, in addition to being of typical Boulton and Paul all-steel construction, is unusual in that the two Napier " Lion " engines are housed in the fuselage, and drive four airscrews placed on the wings. The object of this arrangement was to obtain freedom from total engine failure. The two engines are arranged to drive one pair of propellers each, so that if one engine stops the other continues to drive its own pair of propellers until the damage can be repaired, which in most cases should be possible, owing to the fact that the engines are in the fuselage, where they can be inspected and adjusted by the engineer. It should be mentioned that the whole of the transmission mechanism has been designed and built by D. Napier and Son, whose " Lion " engines form the power-plant of the " Bodmin." The main characteristics of the Boulton and Paul " Bodmin " are as follows : Length overall, 53 ft. 4 J ins. (16-25 m.) ; span, of the flight took place within the Arctic Circle, and no trouble was experienced, the engine "worked like the mechanism cf a clock," to quote the Swedish officer who piloted the machine on this flight. The Bristol " Jupiter-Fighter " is so nearlv identical with the well-known F.2B that a detailed description does not appear to be necessary. The main alteration is in the engine mounting and cowling, which have been altered to suit the " Jupiter " engine. Otherwise the machine is almost un changed. The main dimensions are : Length, o.a., 25 ft. (7-6 m.) ; wing span, 39 ft. 3 ins. (12 m.) ; weight, empty, 1,860 lb. (845 kgs.) ; weight, fully loaded, 3,350 lb. (1,520 kgs.). Speed at ground level, 133 m.p.h. (213 km./h.) ; speed at 10,000 ft. (3,050 m.), 129 m.p.h. (206 km./h) ; speed at 20,000 ft. (6,100 m.), 105 m.p.h. (168 km./h.). Climb to 10,000 ft. (3,050 m.) in 8 minutes ; to 20,000 ft. (6,100 m.) in 27£ minutes. Service ceiling 22,500 (6,860 m.). A modern machine produced by the Bristol Aeroplane Company, Ltd., is the "Bullfinch," about which, however, we are not at liberty to publish detailed information. The machine is shown in one of the accompanying photographs, and it will be seen that the parasol monoplane wing is in •:• •:• •:• The Bristol Bullfinch " is a single-seater fighter mono plane, with 400 h.p. Bristol " Jupiter " en gine. The Bristol fighter, fitted with 400 p.h. Bristol " Jupiter " engine. 'OJft. (21 -3 m.) ; wing area, 1,204 sq. ft. (112 m.2) ; weight, e mpty, 7,920 lbs. (3,600 kgs.) ; petrol, 1,660 lbs. (756 kgs.) ; oil, 320 lbs. (145 kgs.) ; crew, 540 lbs. (246 kgs.) ; useful load, 560 lbs. (255 kgs.) ; total loaded weight, 11,000 lbs. (5,000 kgs.) ; speed at ground level, 116 m.p.h. (186 km./h.) ; speed at 15,000 ft. (4,600 m.), 102 m.p.h. (163 km./h.) ; service ceiling, 16,000 ft. (4,900 m.) ; climb to 10,000 ft. (3,050 m.) n 16 minutes ; climb to 15,000 ft. (4,600 m.) in 35-5 minutes. THE BRISTOL AEROPLANE CO., LTD. ONE of the most successful two-seater fighters during the War 1914-18 was the famous Bristol fighter, type F.2B, fitted with 260 h.p. Rolls-Royce " Falcon " engine. A modern version of this famous machine is the new Bristol " Jupiter- Fighter," in which the more powerful 400 h.p. Bristol " Jupiter" engine has been substituted for the original engine, and the machine otherwise brought up-to-date. The result is a machine possessing all those qualities of stability, etc., possessed by the original F\2B, but with a vastly better performance. It may be mentioned in passing that recently one of these machines flew from Kiruna to Malmslatt in Sweden, a distance of 1,300 kilometres, in 6£ hours. The start two sections, thin in the centre so as to improve the pilot's view, and with a considerable maximum thickness at the point of attachment of the wing-bracing struts. The engine is a Bristol " Jupiter " of 400 h.p. The " Bullfinch " is pro duced as either a single-seater or a two-seater fighter. Other Bristol machines will be found under Civil Aircraft. THE DE HAVILLAND AIRCRAFT CO., LTD. OF recent years, Capt. Geoffrey de Havilland has devoted a good deal of attention to commercial aircraft, and has pro duced some, of the most successful of modern civil aeroplanes, which will be referred to under the heading Civil Aircraft. Of military types several have also been produced, but these are not yet released by the Air Ministry for. publication, and we are, therefore, prevented from publishing photographs, It may be stated, however, that several t3rpes are now in production at the Stag Lane works, and that the firm is, in addition to the production of the usual composite construc tion aeroplanes, turning its attention to metal construction. More than this it is not possible to say at the moment, and we would refer our readers to the reference to D.H. com mercial and light aeroplanes under the sections that follow. 311
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