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Aviation History
1911
1911 - 0666.PDF
MODELS. Paper Models. [1277] Two paper models that are somewhat peculiar, but have, nevertheless, flown very well, are shown in the sketches, and may »i r*^ 1- _+_ 4* be of interest to other readers of FLIGHT, who appear to be devoting considerable attention to this important field of experiment. E. HALSALL. [1278] As many of your readers seem to be interested in making paper models, I send a sketch of one that is uncommon, with which I have had some excellent results. Hull. C. MARR. What are Freak Models? 1279] With many others, I have been very much interested in the discussion re '" Freak" models and " Duration." Mr. Grimmer, in his article on school aero clubs in your number of July 1st, holds •up, as the horrid example of a freak to be avoided, the idea of a model of 16 in. sptn with two 12 in. propellers. Has anyone built one ? And would it be quite so easy to build and fly as Mr. Grimmer -seems to think ? With regard to duration, Mr. Ridley states he " timed" Mr. Holmes' machine to do certain flights, and yet Mr. Grimmer refers to these as " estimated." Does Mr. Grimmer "estimate" flights he takes note of? Otherwise, the change of word is hardly within the ethics of polite discussion. Barnes, S.W. GEORGE ROWLANDS. I1286] Your correction of the error which I pointed out on the 15th inst. (1269) was itself misprinted, although Mr. Grimmer has rightly guessed ihat the particular model I meant was the Fleming- Williams " Flamingo." Mr. Grimmer, in his reply (1270) to my letter about freak models, has very kindly answered several statements which I did not make, -and has altogether ignored my chief point, viz., that the models which fly longest and farthest are the most efficient. If he will read my letter again carefully he will see that I said nothing to the effect that the power-plant and petrol on a full-size -aeroplane is as much as two-thirds the total weight. What I did suggest was that in both full-size flyers and models the "fuel" (i.e., the petrol or elastic, as the cate may be) should form as large a proportion as possible of the total weight of the flyer. Personally I have never seen a modei with two 12-inch screws and a span of 16 inches, and should not think it would be a great success. If such a machine does fly it certainly ought to be fast, and should teach the designer quite a large number of useful facts about air resistance, stability, aerocurve &c, at high speeds. Mr. Grimmer has misunderstood what I said about prizes, and I myself cannot follow the drift of what he says about rating. •" The present methods of rating," he says " certainly encourage the model-maker who is simply out to win." \ think myself that all the competitors in a contest enter with the intention of doing their fcest to win, and fail to see what other purpjs; they can have. Unless models are intended actually for copying full size, I think they should be rated by weight of rubber alone, as this would encourage combined lightness and strength in the frame, and also efficiency in the planes and propellers. I should very much like to know what Mr. Grimmer calls " official" flights. He may be interested to know that with my own models (which, by the way, I did not so much as mention in my letter) I have made flights of over 2,000 feet, as well as others of over 74 seconds. The Ridleyplane, another model which Mr. Grimmer refers to in 1259, has covered as much as half a mile in one flight. Thames Ditton. D. C. HOLMES. Model Duration Records. [1281] Re letter 1268, Mr. Ridley is perfectly correct in assuming that I do not think anyone can beat the duration of the Mann monoplane, which now stands at 89 sees. I am pleased to see that Mr. Holmes has taken up my challenge, and if he does anything in excess of the 74 sees. I mentioned, I shall be the first person to congratulate him. I hope, however, that he will make public the diameter of his propellers and the weight of his elastic, two important factors of efficiency. Also, may I ask him to name a date in August and to nominate one of the two timekeepers ? Surbiton. ROBERT P. GRIMMER. Owing- to the heavy pressure on our columns this week, much Correspondence and other regular features are again held over. © © © ® NEW COMPANY REGISTERED. North-Eastern Aviation Synd., Ltd., Newcastle-on-Tyne. —Capital ^500, in £1 shares. Designers and dealers in biplanes, monoplanes, &c. First directors, Sir Charles A. Parsons, Mr. C. S. Vesey-Brown, and Mr. D. Hodgson. ® ® ® ® Aeronautical Patents Published. Applied for In 1910. Published August -yd, 1911. 16,773. E. BILLING. Machine for teaching flying. 17,036. J. MARSHALL. Aerial machines. 26,421. D. GALVAO. Flying machines. 28,472. H. GAARA. Steering aeroplanes. Applied for in 1011. Published August yd, ign. 1,784. H. JUNKERS. Flying machines. 3,627. C. E. RrTTER. Flying machines. ® ® ® ® PRINCIPAL CONTENTS. • PAGE Our Progressive War Office .. 646 The Breguet Aeroplane .. .. . .. .. .. • • • • 647 The Morane Monoplane ,. . .. • • 650 School Aero Club Ntes .. .. 651 Daily Mail Circuit of Britain 652 From the British Flying Grounds 66 British Notes of the Week 663 Foreign Aviation News .. .. .. .. .. .. .. .. 664 Progress of Fli ht About the Conntry 665 Mr. Graham Gilmour and the Royal Aero Club.. 666 Correspondence.. .. .. .. .- •• 667 FLIGHT. 44, ST. MARTIN'S LANE, LONDON, W.C. Telegraphic address: Truditur, London. Telephone: l828Gerrard. SUBSCRIPTION RATES. FLIGHT will be forwarded, post free, to any part of the world at the following rates:— UNITED KINGDOM. ABROAD. 3 Months, Post Free .. 6 ;„ „ 12 „ „ . s. d. . 1 8 • 3 3 . 6 6 3 Months, Post Free .. 0 >• >> 12 „ „ s. d. • 2 9 • 5 6 . 11 0 Cheques and Post Office Orders should be made payable to the Proprietors of FLIGHT, 44, St. Martin's Lane, W.C., and crossed London and County Bank, otherwise no responsibility will be accepted. Should any difficulty be experienced in procuring FLIGHT from local newsvendors, intending readers can obtain each issue direct from the Publishing Office, by forwarding remittance as above. 668
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