FlightGlobal.com
Home
Premium
Archive
Video
Images
Forum
Atlas
Blogs
Jobs
Shop
RSS
Email Newsletters
You are in:
Home
Aviation History
1911
1911 - 0600.PDF
\fgGHf JULY 8, >gii The essential principle of model designing, then, is to plan a light Strong frame, which will carry as much rubber as possible, and afterwards to arrange the propellers and surfaces so as to make the most of the store of energy which is put into the elastic motors during the process of winding up. If we have a number of models, all with the same quantity of elastic, that which flies farthest is the one which requires least energy for a certain distance flown, and that which flies longest requires least energy for a certain time in the air, or in other words, flies with least power, so I think it must be obvious that the models which do the best distance and duration are the most efficient in their respective ways, although, of course, different designs are required for each kind of efficiency. ^ Then with regard to the large propellers about which Mr. Grimmer is so scornful. If we have a large quantity of rubber it must be in the form of either a long skein with few strands, or a short one with many strands, and consequently, unless we have a long frame, large propellers are necessary to prevent the motors from running down at a high speed, the only alternative being to use comparatively inefficient propellers of long pitch. The short frame has the advantage that it requires a much stronger compression, due to the tension in the wound-up elastic, to buckle it, and so can carry more rubber in proportion to its weight. The large propellers, too, have the advantage or a smaller per centage slip. After all, apart from its scientific value, one of the chief uses of the model aeroplane, at any rate to the amateur airman, is to win prizes, and although Mr. Grimmer may have the strength of character to resist the temptation of using big propellers in order to win a contest, I myself should give way to it, and prefer the " empty honour " (not to mention the cash prize) to the feeling of having done my duty by sticking to " eight-inchers." Nearly all the most successful models of the present day might be called freaks, according to Mr. Grimmer's principles. The well- known " Hamings " model, if reproduced full size, might be fifty feet long, sixteen feet in span, and carry two eight-foot propellers ! The latest Mann model, another of a rather similar type, would be hardly less ridiculous, and the Ridleyplane, which has distinguished itself in this year's competitions, would be a freak of contrasted type, though not differing greatly in Droportions from Mr. Ogilvie's " Baby " Wright machine. ' BBCA-""^ With apologies to Mr. Grimmer, and to you for my encroachment on your space, should you rind room for my letter. Thames Ditton, July 3rd. D. C. HOLMES. Model Construction. [1261] lr-' The accompanying sketch shows a simple model mono plane built on a hickory stick of $ in. by fV in. section. The wing framework is made of cane and the surfacing material is paper. Steel wire is used for the tail framework, and the propeller is also FLIGHT PIONEERS ALREADY PUBLISHED. F BAGS S- of steel wire surfaced with paper. The model will rise from the ground by its own power, derived from ten strands of I in. rubber. It will rise in about 3 ft., and will attain an altitude of about 40 ft. The best flights are about 100 ft. in length. Putney. F. BAGGS. Astley, H.J.D.... Mar. 25, 1911 Barnes, G. A. ... Sept. 24, 1910 Boyle, Hon. Alan July 23, „ Clement, Mons. A. Oct. 22, ,, Cody, S. F. ... Sept. 18, 1909 Colmore, G. C... Dec. 10, 1910 Conner, Lieut. D. G Mar. 4, 1911 Dickson, Capt. B. July 16, 1910 Drexel, J. A. 30, Ducrocq, Maurice April 29, 1911 Dunne, J. W. ... Sept. 3, 1910 Farman, Henry... Feb. 12, Gibbs, Lancelot D. Aug. 13, Gilmour, D. Gra ham ... ... Oct. 29, Grace, Cecil ... July 9, Grahame - White, C April 30, Greswell, C. H. Feb. 25, 1911 Hamel, G. ... April I Ladougne, E. ... Oct. 15, 1910 Loraine, Robert Sept. 17, 1910 Maxim, Sir Hiram Mar. 12, McArdle, W. E. Nov. McClean, F. ... Dec. Moisant, John B. Aug. Moore-Brabazon Nov. Morison, O. C— Jan Ogilvie, Alec Paulhan, Louis .. Pixton, C. H. .. Prier, Pierre Radley, James .. Roe, A. V. 26, ,, 18, 1909 27, 1910 6, 1909 21, 1911 10, 1910 22, ,, 6, 1911 April 22, ,, Aug. 20, 1910 Jan. 29, Sept. Jan. May Rolls, Hon. C. S. Nov. 13, 1909 Singer, Mortimer Jan. 15, 1910 Sopwith.T- O. M. Dec. 3, „ Valentine, James June 24, 1911 Wallace,RogerW. Jan. I, 1910 Watkins, Lieut. H. E Feb. 4, 1911 Wood,Capt.|H.F. Feb. 18, „ Applications for the above full series, or singly, should be made to the PUBLISHERS, 44, St. Martin's Lane, W.C. ® © ® ® NEW COMPANIES REGISTERED. Aerial Wheel Synd., Ltd.—Capital £5,000, in £1 shares. Aerial wheel, aeroplane, motor car, and coach builders, &c. Hastings Aerodrome, Ltd., 10, Agar Street, Strand, W.C.— Capital £600, in £1 shares (300 "A" and 300 " B "). Caterers for public entertainments, exhibitions, &c. ® ® ® ® PUBLICATIONS RECEIVED. "Acer" Cylinder Grinding Specialities. Acer, Ltd., Leaborne Works, Harrow. ® ® ® ® Aeronautical Patents Published. Applied for in 1910. Publislxd July 13th, ion. J. W. DUNNE. Aerial machines. 16,276. 20,105. 20,768. 29,231. B. T. B. HYDE AND A. GAUL. Aeroplanes. J. BRIERE AND L. DUPUIS. Flying machines. R. BLACKBURN. Landing devices for aerial machines. Applied for in 1911. Published July X'&tk, 1911. 499. J. VON KORWIN. Aeroplanes. 3,444. C. LEMALE. Aeroplanes. 4,249. H. MITCHELL. Flying machines. 11,229. W. B. ALEXANDER. Aeroplanes. ® ® ® ® PRINCIPAL CONTENTS. PAGE 582 583 And the Pity of It!! ! Flight Pioneers. (Mr. C. T. Weymann.) Gordon-Bennett Cup Race 584 Royal Aero Club Notes .. _ S90 From the British Flying Grounds 591 New Army Biplane .. .. • • • • • • 592 Valkyries and the Government 3 British Notes of the Week 59 Foreign Aviation News 4 European Circuit .. 595 School Aero Club Notes 598 Alvaston Engines .. .. .. .. .. . • • • • • • • 599 Correspondence.. .. .. .. .. .. .. •• •• •• 600 FLIGHT. 44, ST. MARTIN'S LANE, LONDON, W.C. Telegraphic address: Truditur, London. Telephone: 1838 Gernurri. SU BSCRIPTION RATES. FLIGHT will be forwarded, post free, to any part of the world at the following rates:— UNITED KINGDOM. ABROAD. s. 3 Months, Post Free ._ 1 6 11 n — 3 2 „ „ ... 6 d. 8 3 6 3 Months, Post Free .. 6 „ n 12 „ 11 t. 2 5 11 d. 9 6 e 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. 602
Sign up to
Flight Digital Magazine
Flight Print Magazine
Airline Business Magazine
E-newsletters
RSS
Events
