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Aviation History
1914
1914 - 0322.PDF
lf^\ calibrating it, and the deducing of the chart of relative corrections which every anemometer should possess, which is the trouble. It is not an instrument that can be ** rigged up " out of a few odds and ends, or, to speak more correctly, it could be so rigged up, but how are you going to calibrate ? Something could be done in this way, if you could borrow a good one and do it by means of that. Some thing in the pressure plate line would be much simpler and easier to construct, like the one used by Sir Hiram Maxim. See Thurston's ** Elementary Aeronautics," pp. 76-77. M«w» W. E. Evans and Sons' Latest Productions. We have received from the above well-known firm some excellent samples of their latest specialities for aeronautical model workers. We take this opportunity of pointing out that lightness or reduction in weight, so long as strength is not sacrificed, is in reality an immense benefit in the other arts and sciences as well. To take a concrete case, the writer happens to be building at the present time a novel electrical machine ; as it is to be portable, lightness is an important item. By employing principles and practice learnt chiefly from aeronautical models and specialities and accessories which have been introduced to the public since model flying came into vogue, I find I can reduce the weight of the machine to one-third what such a machine would weigh in the ordinary case and still obtain twice the effuutuy. Moreover, this is not the first time I have applied such pr-if£fC' Eve"if mod*1 aeronautics were worthless in itself, it would still be worth studying for the use which such is in other practical work. Amongst the samples kindly sent us by Messrs. W. E. Evans and Sons are some veneer tubes of specially selected sycamore, double thickness, viz., one 4 ft. long by 1 in. in diameter, and other 3 ft. 6 ins. long by f in. in diameter. In spite of their lightness and extreme thinness they are immensely strong, and especially so far as any end thrust is concerned, the rubber model could well be con tained in the tube, a method we have more than once advocated, since it does so much to diminish head resistance. Some excellent samples of hollow streamlined spars are al<o enclosed. There is no doubt that these are coming more and more into vogue, chiefly owing to the fact that with such no kingposts and wire bracing are re quired, which is, generally speaking, an advantage. These spars are made of the finest silver spruce, specially selected, and are 3 ft., 3 it. 6 in., and 4 It. in length. The maximum depth and width vary, of course, with the length of the spar. Another new line is an improved "plane" edging, or, strictly speaking, hading edge," made of white birch, a very tough and clean sample of which we have tested, and which shows no tendency to break off short. We also find that if only reasonable care be " A J nal'S can ** drivcn trough it without splitting. The rounded plane edge placed on the market some months ago by the same firm has, we are informed, been in great demand. The quality ot this white birch certainly leaves nothing to be desired. ,,remaimnB enclosures sent us included a pair of 9 in. cambered propeller blanks for bendinir (these are remarkably thin and strong) and 2 pairs of 9 in. shaped propeller blocks for carving. These latter the firm supply ln three different woods, viz., satin walnut, whitewood (poplar) and pine. Also a large selection of l-plv wooden wheels, 1 in., 14 in., 2 in., 2), in. and 3 in. in diameter. inese wheels are cut out, and are very light and strong, and have quite a neat appearance. Painted with aluminium paint, one could quite well take them for wheels made of that metal, but they are of course, much stronger than such would be. As regards the weight of the hollow spars and tubes, the firm tod it expedient not to cut the weight down too fine, but to leave Utis part of the business to the skilful model maker, who can easily mime the weight by means of sandpapering to the desired limit. Messrs fcvans, however, are quite prepared to turn out specially light spars for record-breaking models. For instance, some time ago they stipplud to a leading firm a hollow spar 3 ft. long, section wood and specialities direct to the trade only, but they are obtainable from the principal supply houses for models and their accessories. ® ® ® ® KITE AND MODEL AEROPLANE ASSOCIATION Official Notices. Aero Exhibition.—A fairly good exhibit of models has been received, but there are only a few novel ideas. There are 15 entries on the power-driven class, and ii should prove an interesting competition. The exact date of the flying trials will be announced. ne>t week, and all those who do not intend competing will oblige In informing the hon. sec. Passes, &c, will be distributed at the Exhibition. Membership.- Will all members endeavour to enrol at least one new member during the exhibition MARCH 21, 1914, AFFILIATED MODEL CLUBS DIARY. CLUB reports of chief work done will be published monthly for the future. Secretaries' reports, to be included, must reach the Editor on the last Monday in each month. Aero-Modeis Assoc (N. Branch) (27A, SEDGEMERE AVENUE, EAST FINCHLBY, N.) MARCH 21ST, flying Finchley, 3 p.m. ; March 22nd, 10 a.m. April 5th, annual general meeting. .».•«.-• „ Leytonstone and District Aero Club (64, LEYSPRING ROAD). MARCH 2jnd, flying on Wanstead Flats 10 a m. If wet meet at club room. Paddlngton and Districts (77. SWINDERBY ROAD, WEMBLEY;. MARCH 21ST, members meet at club stand, Olympia, 6 p.m. Reigate, Redhlll and District (THE COTTAGE, WOODLANDS AVENUE, REDHJLL). MARCH 21ST, club visit to Olympia ; train leaves Redhill at 8.50 a.m. Sheffield Ae.C. (41, CONISTON ROAD, ABBEYDAI.E, SHEFFIELD). MARCH 28TH, at 3.30 p.m. at Standhouse Aerodrome, Intake, first contest for weight.carrying machines, al-o hand-launched. Novices, for silver medal and bronze medal, presented by Mr. C. F. W. Cudworth. April nth, tractor o iplane contest for Mr. M. D. Manton's silver medal. UNAFFILIATED CLUBS. Flnsbury Park and District (52, LAMBTON RD., STROUD GREEN). MARCH 21ST, flying as usual, Finsbury Park Kite Ground, 2.30 p.m. till dusk. Word Model Ae.C. (83, ENDSLEIGH GARDENS, ILFORD). MARCH MND, flying, 9.30 a.m. (weather permitting), Hog Hill, Hainault Forest, Chigwcll Row. S. Eastern Model Ae.C. (1, RAILWAY APPROACH, BROCKLEY). USUAL week-end flying at Woolwich, Blackheath and Lee. On Saturday (21st inst.) the hon. secretary, Mr. A. B. Clark, will be pleased to meet friends visiting Olympia, at FLIGHT stand between 6.30 and 7.^0 p.m., and on Monday same time and place. ® ® ® ® AERONAUTICAL SOCIETY OF GREAT BRITAIN. G. Aldwell, R.N., and Official Notices. I. Elections.—Members : Eng. Lieut. F. S. Barnwell. Meeting.—The tenth meeting of the present session will be Hacks Flying held on Wednesday, April ist, at 8T30 p.m. Messrs. B. C. and C. Gordon Bell will read a paper on "Three Years' Experience," followed by a discussion. Members are reminded that, under the rules, they may introduce visitors to general meetings. Tickets for visitors, not introduced, may be obtained from the Secretary, II, Adam Street, Adelphi, W.C. B. G. COOPER, Secretary. *> ® ® ® CORRESPONDENCE:. Aerodynamic Effects of Gusts on Wings. [1846] Your correspondent, Mr. S. C. Shepley Part (1845), suggests that the number of pulsations of the propeller draught per minute is equal to one-half the number of revolutions of the propeller. I suggest that they are obviously equal to twice the number of revolutions. Eccles, March 15th. R. A. TURNER. " Controls." [1847] I notice in FLIGHT of March 7th, you give an illustration and descriptive matter of the new Wright control. May I point out that this control is, in principle, identical with that which I had on my machine at Brooklands in 1910 (and which was invented about two years previous to that). Walton-on-Thames, March 9th. G. H. POINTER. iunng »7.V ictory Roid, Wimbledon. W. H. AKEHURST, Hon. Sec 22 FLIGHT. 44, ST. MARTIN'S LANE, LONDON, W.C. Telegraphic address: Truditur, London. Telephone: i828Gerrard. SUBSCRIPTION RATES FLIGHT will be forwarded, post free, at the following- rates :- UNITE* KWGDOM.^ ABROAD. 3 Months, Post Free... 3 % 3 Months, Post Free... 5*0 n " ,"„ '•• IS ° I2 » -. ••• 20 o PropZtlrsZ/Ar^ ^Z 5h0UUbe «* *°r°U* to the I^*2£^£J^£M* L-e, W.C./^ crossed •will be accepted. rvestmlnst^ Bank, otherwise no responsibility Jal^/eislZlr^'^ be'Xpene'Uea in Paring FLIGHT from from thTp^niJn^Y laders can °btain ««* &*« direct from the Publishing Office, by forwarding remittance as above. t
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