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Aviation History
1913
1913 - 0612.PDF
It is, we think, very important to draw a careful distinction between cause and effect, between the thing and the use to which it may be put. Between real research work such as carried on, say, at the National Physical Laboratory and ordinary model flying there is of course a vast difference, and it is more of such work that is wanted. In the Technical Report of the work done by the staff of the above (1911-12), and which anyone interested can obtain from Messrs. Wyman and Sons, Fetter Lane, E.C., for lis., the most important paper is probably " The Use of Models in Aeronautics," in which an attempt is made to show how the resistance of a full-sized machine can bs obtained from the resistance of its model ; and the general idea of what is termed the " Law of Similitude " is explained. It is shown, so far at any rate as practicable purposes go, that the law is correct so far as the lift, &c, of aeroplanes is concerned, and also, in all probability, with respect to their stability and the action of the propellers (provided the speed be not excessive), but that it fails in the case of forms of a streamline character, such as dirigibles, birds, &c. This latter fact is because at present we do not know the real character or nature of the resistance which such bodies experience when moving through the air. Generally they are termed head or form resistance and " skin friction," but we do not know the exact formula for either, or even if there are two really different kinds of resistances at all. When a shipbuilder has to build a new liner to fulfil certain con ditions, say a certain speed, horse power, etc., he is now in the fortunate position of being able to make a model (of his design) in wax, and by drawing it through a water tank, by means of a sort of overhead crane, fitted with suitable recording instruments, at a certain speed, he is able to tell (thanks to the law of similitude in his case), whether his design (as exemplified in his model), is correct or not. If the latter, then he so modifies it until the desired result is obtained, and when such an end has been achieved, he then sets to work on his full-sized boat, with the comforting knowledge that in the ordinary course of events he can accomplish what he has been asked to do, or is able to declare that the conditions asked are such as do not admit of a practical solution. When the same can be done in aeronautics, then the model will occupy a somewhat higher pedestal than that on which many are inclined to place it at the present day. Research work of such a character as that referred to above not only requires skilled and trained observers but almost invariably a considerable outlay of money as well, and is quite outside ordinary individual or club work. There are, however, minor branches of research work in which some of the clubs could undoubtedly do something, and we shall be very pleased to hear from any club either intending or prepared to under take such work, as well as a general idea of the nature of the proposed work. There are quite a number of points in Mr. Tivy's communication on which there is much to be said in the way of criticism, and we should like to hear what our readers have to say with respect to them, either for or against. Model Club for Toronto (Canada). Mr. C. E. Hoole, West End Y.M.C.A., Toronto, would be glad to hear from anyone living in Toronto, with a view to forming a model club out there. Model Club for Wellington. Mr. A. Humphries (26, Fore Street, Wellington, Somerset) writes, saying : I should be much obliged if you would notify in FLIGHT that a model club has been formed in this town, and that the membership already numbers 15. The club is in negotiation for a club room and workshop. I should be very glad to hear from anyone in the district who may be interested. «> ® ® ® KITE AND MODEL AEROPLANE ASSOCIATION. Official Notices. British Model Records. H.Dd.,.nnch.d ... g£5£ ;;; £££*£ Z %^ °"™d 3S ::: ?:K"t- ... -ss^ Hydro, off water ... Duration ... F. Whitworth ... 37 sees. Single-tractor screw, f Distance ... F. G. Hindsley ... 173 yards, hand-launched ... (. Duration ... J. E. Louch 68 sees. Do., off ground ... Duration .. J. E. Louch 45 sees. Official Trials.—On Saturday, May 7,1st, the official observers attended Wimbledon Common for the purpose of observinz nights for distance and duration for re^ist'ation and establishing reords. The observers were Messrs. F. Mayer, W. H. Akehurst and A. F. Houlberg. The results were:— Distance, hand-launched: R. Lucas (Mann machine), 590 yds.; A. Lewis, 551 yds.; L. F. Hutcheon, 384 yds.; others competed, viz., Hamilton-Fox, F. B. Eads, L. Tucker, &c. Duration off ground : J. E. Louch (North-East London), 54 and 68 sees.; B. Longstaffe (North-East London), 50 and 56 sees. ; H. G. Kond (North-East London), 52 sees. ; M. Levy (Paddington), 46 sees. ; A. Cannell (Paddington), 41 and 46sees. Single-screw tractor :—Hand-launched \-Ei duration: I.E. Louch (North-East London), 51, 6t and 68 sees. duration; j. E, l,ouch (North-East London), 22 and 45 sees. As will be seen Off groun the h>ndlaunched distance record that has stood so long fell to R. Lucas with his Mann machine, he having increased the distance of 477 yds. of A. E. Woollard to 590 yds. Also the off ground record held by A. F. Houlberg of 51 sees, was beaten four times during the afternoon. Both tractor records were beaten by J. E. Louch, who beat his own record of 44 sees, for hand-launched1 by 24 sees., and the r.o.g. of 40 sees, by 5 sees. " Model Engineer" Competition.—This competition takes place this afternoon on Wimbledon Common, on the Plain, Wimbledon side of Windmill, at 3 o'clock: sharp. All competitors must report to judges by 2.30. Hydro. Competition, Welsh Harp, Hendon.—All entries must be sent in to-day, June 7th, last day for receiving entries. Official Trials.—The next official trials are to be held on the ground of the Hendon Aero Club. Full details, &c, next week, as to route. International Kite Competition.—A letter from a prominent French gentleman has been received by the President, stating that if an International contest for kites were arranged that at least 11 of the French associations would compete. Application for Affiliation.—An application for affiliation has been received from the Sheffield Model Aero Club. 27, Victory Road, Wimbledon, S.W. W. H. AKEHURST, Hon. Sec. AFFILIATED MODEL CLUBS. 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-Models Assoc. (N. Branch) (25, CHURCH CRESCENT,. MUSWELL HILL, N.). JUNE 7TH. Monthly competitions postponed to June 14th, 3 p.m. Levtonstnne and District Aero Club (64, LEYSPRING ROAD.) JUNE 7TH, flying at 3p.m. June 8th, at 6.30a.m., model yacht pond; at xo a.m., near brickfields. N.E. London Model Ae.C. (57, KING SQ., GOSWELL RD , E.C.). A FEW members flying in Model Engineer competition at Wimbledon- Other members meet Hackney Marshes, June 7th, at 3 p.m. Paddington and Districts (77, SWINDERBY ROAD, WEMBLEY). JUNE 7TH, flight golf competition on temporary ground. July loth, Paddington cup open duration competition on Sudbury ground. Entries close first post July 12th. Entrance fee for non-members, us. Intending competitors please note that models must rise under own power. Minimum weight, 4 ozs. Winner to hold cup for year, and retain silver-gilt medal; 2nd receives silver medal ; and 3rd bronze medal. Sheffield Model Aero Club (35, PENRHYN ROAD, SHEFFIELD). JUNE 7TH, commencement of novices' monthly contests, longest duration, hand-launched, at Standhouse aerodrome, Intake, 3 p.m.; minimum flight, 35 sees. June 9th, special general meeting, club room, 7.30 p.m.; all members please attend. Wimbledon & District (59B, ST. PHILLIPS RD.,LAVENDER HILL). JUNE 7TH, flying. Wimbledon Common, 3 o'clock; June 8th, 11 and- 3 o'clock ; June 21st, competition for silver medal, Saturday. UNAFFILIATED MODEL CLUB DIARY AND REPORTS. S. Eastern Model Ae.C. (i« RAILWAY APPROACH, BROCKLKY). JUNE 7TH, flying at Grove Park, 4.30 to 8.30 p.m.; 8th, at Blackheath,. 7.30 to to a.m. ; at Mitcham, 2.30 to 6 p.m. ® ® ® ® Price of Cellon Reduced. WE learn from the Cellon Co. that they have secured large Government contracts, which have enabled them to enter into contracts for the purchase of the raw materials on very advantageous terms, and by so doing they are able to reduce the price of their famous all-British Cellon Dope to 15.1. per gallon. As before they will continue to pay carriage on quantities of 10 gallons and over. ® ® ® ® PUBLICATION RECEIVED. Bulletin de I'lnstitut Aerodynanriqtie de Koutchino. Vols. I, II, and III. Moscow, Russia: I. N. Kouchnererl and Cie., Pimenov- skaia, 12. ® ® ® ® Aeronautical Patents Published. Applied for in l!H». Published June $th, 1913. 11,154. H, HUNTINGTON. Aeroplanes 18,253. SIEMENS SCHUCKERTWERKE GES. Balloon envelopes. 22,283. j. H. KENDIG. Safety appliances for flying machines. 29,053. B. T. B. HYDE AND A. GAUL. Aeroplanes. Applied for In i»i:t Published June $th, 1913. 5,246. H. HIRTH. Flying machines. 10,263. H. HUNTINGTON. Steering aeroplanes. FLIGHT. 44, ST. MARTIN'S LANE, LONDON, W.C. Telegraphic address: Truditur, London. Telephone: i828Gerrard. SUBSCRIPTION RATES. FLIGHT wiL be forwarded, post free, at the following rates:— UNITED KINGDOM. ABROAD. 3 Months, Post Free ... 6 „ ,, 12 „ „ s. 3 7 15 3 Months, Post Free .. t> ., .» 12 s. d. 5 o 10 o 20 o Cheques and Post Office Orders should be made payable to the Proprietors of FLIGHT, 44, St. Martin's Lane, W.C., and crossed London County and Westminster Bank, otherwise no responsibility will be accepted. 634
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