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Aviation History
1942
1942 - 1658.PDF
>•/• 156 FLIGHT AUGUST 6TH, 1942 PREVENTION OF ROCKET MOTOR BURN OUT pellant feed pressures, through the use of sets of regulating valves. An interesting analogy to outside burning may be per formed by placing a finger in a stream of water a short dis tance from a faucet. When the spigot is regulated to deliver a flow of less than $ inch in diameter, a series of waves will travel upward from the obstruction to the spout. Letting the faucet represent the motor, the flow of water the, efflux gases, and the finger the centre of combustion, the shock waves in the water stream will be analogous to the pressure reaction waves flowing back to the motor in outside combustion. From a study of the June 1941 ground test of the Piecewitz-Carver nozzle-less motor, many essentials of out side combustion become clarified. Although during this test the outside burning principle was much over emphasised a recoil of 26 lb. was recorded. All combustion was completed outside the motor, with a sort of '' glorified blow-torch'' effect, due to an unbalanced ratio of pro- pellants, especially a lack of oxygen. With a better regulated proportional feed mixture, the area of outside burning would be more limited, more burn ing would take place within the motor, and a greater reaction would be obtained. This motor test is believed to be one of the few where instead of heating up, the motor acquired a coat of frost during the firing. By using concentric feed and employing outside burning whenever deemed necessary, the writer believes trie princi pal impediment to successful rocket motors can be over come. With the problem of motor burnout once solved, the solution to the remaining problems should be found without too much difficulty. Aircraft 1914-1918 T HE HARBOROUGH PUBLISHING CO., LTD., has had the happy idea of issuing a series of sheets of three-view general arrangement drawings of aircraft in service during the J914-18 period. With the interest in flying so widespread among the general public, there must be many who would like to know what the machines used in World War I looked like, and many young men are in the R.A.F. to-day whose fathers flew the corresponding types in about 1917 or 1918. The drawings give a fair amount of detail, including three sections through the fuselage and one showing the wing sections used. One advantage is that all are drawn to a uniform scale of Oft. to the inch, so that relative sizes are immediately appreciated. The smaller types are drawn on sheets measuring 7m. by 9Jin., but, for the larger, dopble sheets are necessary in order, to maintain the uniform sc#le. We have received drawings of some fifty types, including British, German, and French, but we are informedjfnat the intention is ultimately to bring the number up to #5out 100. Prices are as follows: Single plans, 6d. ; three plaft, is. ; six plans, is. gd. ; twelve plans, 3s. The plans a£ obtainable from the Harborough Publishing Co., Ltd., Newarke Street, Leicester. To Prevent Wais|\? House, cutting by for use1 in Canada steel available for tatement by H. H. A WARTIME Prices and Trad<J 30 per cent, the tonnage .ot*<xn is going to make 6o*4ans pf%§ghly waL^urpos»»K a&ordinalto a rece5 lyfeman, *ii)jmiiitrator 3f fabricate jThe redrJptjpn applies to 1942 production and is based on tie i94i>o»tiput. The metal used for corsets is one of the m\st-b*^nly finished steels and is required for springs in aircraft engines and other war purposes. R.A.F.'s Training Facilities in US. J UST over a year ago, when there was a great need of increased training capacity for air crews, the United States Government offered to fill the gap whilst further training facilities were being developed throughout the Dominions by placing training capacity in the United States at the disposal of the R.A.F. This offer was gratefully accepted. Since this scheme was inaugurated the United States Ait Forces have, however, made such rapid strides in their own training expansion that they are now in a position to man large numbers of aircraft previously allotted to the R.A.F. and, as training rapacity within the British Commonwealth has been rapidly and successfully developed, it has now been found possible to relinquish United States training capacity allotted to the R.A.F. United States Air Force cadets will accordingly eventually take the place of Royal Air Force trainees in the south-east training centre where training is in progress. British flying training schools in the United States which are operated under contract with civil companies so far remain unaffected with the exception of two, which will eventually lie taken over by the United States Air Forces. The scheme has been a great success, not only on account of the large number of pilots trained, but also because it led to close co operation between personnel of the United States Air Forces and the R.A.F. In addition to the marked success of the scheme from the training aspect, the kindliness and hospitality shown by American families to so many young men who came among them straight from England has been immensely appreciated and, it is safe to say, will never be forgotten. Passable Essay •*** AT a Fighter Command station in the North-East an air craftman was tested by the education officer as a candi date for air crew, and among things he was asked to write was '' a twelve-line summary of the political situation in India." The aircraftman duly handed in his paper, and the educa tion officer was overwhelmed to read a compact little essay, which would have done credit to a newspaper leader-writer. He expressed his praise and remarked, "You seem to have some literary talent." Whereupon the aircraftman murmured respectfully, " Ye§, sir; I was managing editor of a chain of newspapers before I entered the Service." TRAINING THE WESTERN HEMISPHERE : This^flight of Stearman primary trainers indicates by its markings that in addition to the United States, this type is beirfg used by the Brazilian air force, the Cuban army Venezuelan army. The Maple Leaf -cotrtd the type has been adopted byXftfiada machine was designecLftffwork in t« is to be assumed tbtft: for use in Canada hoods, blind-flyjjig instruments, night Sutton harness, rps and the i?e added, as The j^iginal American :e climates, and it re will be cockpit g equipment, and f\ *
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