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Aviation History
1919
1919 - 0104.PDF
ljLfeLs2 JANUARY 23, 1919 Type of machine. Scout D .. Scout F .. Monoplane Fighter F2B. " All- Metal " Bomber .. Engine Type. LeRh. S.A. Le Rh. R.R. H.S. 4S.D. Table of weights, etc., and performance of H.P. 80 200 no 264 170 250 Weight of machine (loaded). lbs. 1,250 2,100 1,300 2,800 2,810 16,200 Fuel capacity (gallons). rol . 0 27 32 20 45 50 400 O 5* 5 5 4 5 40 Rang e in miles) . Speed (m.p.h. X2 100 138 130 125 no 106 00 0 0' M 86 128 117 113 98 93 )• 00 0 in M "Bristol " Climb (in mins.) to 00 0 10 , 18 -5 8-5 9-0 115 20 35 00 0 H i6-o 19-0 21-5 machines. Ceiling . ft. Stallin g speed . m.p.h. Landin g speed . m.p.h. 44 49 49 48 47 55 Load/sq . ft . lbs. 6-25 8-o8 8-97 6'92 6*13 8-50 Load/h.p . lbs. *4"7 IO'O io-8 io*6 I6«5 16*2 [ilitar y load . lbs. 60 270 80 270 270 2,960 Le Rh. = Le Rhone. S.A. = Sunbeam " Arab.' S.D. = Siddeley-Deasy (" Puma R.R. = Rolls-Royce. H.S. = Hispano-Suiza. Type of machine. Scout D .. Scout F .. Monoplane Fighter, F2B. All-metal.. Tri planet th o.a . bo a u J ft. in. 20 8 20 10 20 4 25 9 27 0 51 6 Wing span. d H ft. in. 24 7 29 6 30 9 39 3 42 2 81 8 • 0 B3 ft. in. 24 7 26 2 39 3 42 2 78 3 Table Wing chord. d. H ft. in. 4 6 5 7 5 " 5 6 6 0 8 6 0 cc ft. in. 4 6 4 II 5 6 6 0 8 6 of dimensions of " Bristol " Wing area.* fi 0 H .j a . a 0 H square feet 103-5 150 145 202-5 235 650 96-5 no 202-5 223 605 200 260 145 405 458 1,905 Inci dence. d H u 2i 1 0 I* 0 -k ^j ffi O 3* I ii 0 2i P. a O ft. in. 4 3 5 I 5 5 5 n 7 2J to rt ft. in. I 9 2 I I 5 0 0 machines. pback . 0 0 0 0 0 0 6* Dihedral. ft O H 0 3i 0 2 3* 3* 2 4-> ffl 8 3* 0 3* 3* )» area . T; sq.ft. 23*5 30-5 18 50 59 192 Area. s 0 RJ rt H 0. • 0 W? 2 0 h square feet. 23 15 20 22-2 27-8 96-5 15 H-5 15 23-2 30-0 «5-o 38 29-5 35 45-4 57-8 181-5 Area. c £ •0 & 5 c S- square feet. 0 4-1 5 10-7 7-8 28-2 7 5-3 4-5 7-2 8-25 25 7 9-4 9-5 17-9 16-05 53 -2 * Including ajkrons. t Centre plane : Span 81 feet 8 ins., chord 8 feet 6 ins., area 650 sq. ft. type of machine might have reconquered some of the prestige it appears to have lost, and in France at any rate there was not lacking indications to this effect, although this may not be common knowledge on this side of the Channel. For peaceful purposes we are not at all certain that the last has been heard of the monoplane type of machine. The Bristol Fighter Probably the best known of the Bristol products during the War is the Fighter (F2B). This machine has been exten sively used for fighting, reconnaissance, etc., and will be more familiar to readers of " FLIGHT " than, probably, any of the other Bristol types. The impression one receives on examin ing the F2B is that it was designed in the first instance for the purpose for which it was intended, and not merely designed from the aero-dynamical point of view and after wards rigged up for certain purposes, for which machines happened to be required. There is a decided difference between the two methods. Thus it will be observed that the designer quite evidently had in his mind to provide as free a field aft as possible, and to this end he chose to flatten the fuselage out to a horizontal knifes edge, bringing the various tail members down lower out of the way of the gun. Also the flat top of the body bears evidence of this intention. Again, it was desired to place the gunner and pilot high in relation to the top plane, and to do this would have meant, with the ordinary arrangement, a very deep body with consequent large maximum cross-sectional area. To avoid this the lower plane is not attached to the body, but runs right underneath and some distance below the bottom of the fuselage. This arrangement has resulted in a somewhat more complicated undercarriage attachment, but everything considered, there is little doubt that it has been worth while. From the table it will be seen that the performance of the F2B with Rolls-Royce " Falcon "' engine is very good indeed. A feature of this machine which will not be found in the table and which cannot be put in table form owing to the absence of any standard of comparison, is the excellent stability of this machine. We are informed by pilots that although she is not in the least sluggish on the controls the Bristol Fighter is endowed with a remarkable amount of inherent stability, which renders her particularly easy to fly. It would, therefore, appear that Capt. Barnwell has managed to find the solution to the problem of good stability com bined with ease of control, a fact which should be extremely valuable for post-war aeroplanes. The Bristol " All-Metal " Biplane From the earliest days of aviation the question of wood versus metal construction has been the subject of discussion, and both methods have had their supporters. Up till the present, however, the wood construction has been pre dominating, at any rate in this country. Particular interest therefore attaches to the few examples of the metal con struction method that have been built. Among these is the Bristol type MRI, shown in the accompanying illustra tions. At the present moment we cannot, unfortunately, publish constructional details of this machine, this must be reserved until another time, but several interesting facts The Bristol all-metal biplane. IC4
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