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Aviation History
1910
1910 - 0984.PDF
w ICHT tension of the power elastic (of which three geared skeins were used) being maintained by a length of untwisted elastic on the other side of a slide with suitable hooks, shown at A. If this elastic is very short, or if it is of many strands, and not stretched much before winding, hardly any travel will be got out of the slide on winding. ENTW1STED /ELASTIC £ SUQE TWISTED, ELASTIC B fl CD It must be of a few strands (or very thin), and consequently tightly stretched before winding is commenced. If this is the case, and A is the position when motor is unwound, the first appreciable motion of the slide when winding up will be towards B (though there is sometimes a very small preliminary motion towards C). This movement is somewhat surprising, but it will continue till knotting begins, when the slide will have reached, say, B, though knotting can be, so to speak, encouraged, and made to take place earlier, when the turning point, B, will not be so far from A. The slide then moves back, and reaches a position about at C, by the time knots are formed all along the skeins. If now the propeller is allowed to run, the slide will move up to D (for about three-tenths of the time of running on my model) and then move fairly steadily back to A, no appreciable movement beyond A to B being noticed (probably because the knots once formed tend to remain). The first movement towards D is probably due to some effect of centri fugal force, and might not be so great on a slower-speed motor. If after single knotting is complete winding is continued, the slide shows an inclination to move from C slightly towards A, until double-knotting begins, then back, the final position when a few double knots are formed (which I believe is about the permis sible number of turns) being somewhere near D. On letting run there may first be a very small motion back towards the propeller, but the chief movements are a little forward, back to D, and then on to A as before. About five-twelfths of the time of unwinding was spent round about C and D on my model before the final forward move ment took place, so I game to the gonclusion that I could not make the model steer round, dive, &c, in the middle of its flight as I had intended it to do by means of suitable mechanism on the slide. How ever, this might be managed with a flyer going for a long distance, or with a slower-speed motor. The gliding adjustment might be done by the final movement of the slide, but I rather think that with the elastic above the stick carrying it, if the stick is fairly flexible, it will have a slight bow- shape when the elastic is fully wound, and get straighter as the tension gets less, thus lessening the angle between the front and back planes as gliding begins, without any sliding mechanism at all being needed. Wimbledon. B. BRUCE-WALKER. MODEL CLUB FOR HANWELL. [921] A few others and myself are desirous of forming a model aeroplane club in this district, and we should be greatly obliged if, by the publication of this letter, you would aid us in bringing our wishes before the notice of those enthusiasts residing in this and the surrounding neighbourhood. If intending entrants will communicate with me a meeting will be arranged, when election of officials and general details will be arranged. "Loretto," 17, Holly Park Road, R. R. DRAKE. Hanwell, Middlesex. TWIN-SCREW MODELS. [922] If " B. G. D.," Holloway (747), can move his rear plane along the backbone of his model, let him move it forward little by little until he finds the correct position, when the model will glide without dipping. If not, there is no harm in fitting a third pro peller, provided he gets the three to work without touching each other. Glasgow. AMATEUR. ELASTIC MOTORS. [923] It would be interesting if Mr. Langdon-Davis would give some account of how the torque of the elastic motors is measured in the very interesting article that appeared in FLIGHT NO. 90. Altrincham. R. M. L. Stewart, not Steward. MR. NORMAN S. STEWART wishes us to point out, in regard to his machine at the Stanley Show, referred to by us on page 951 last week, that his name is spelled with a final " t," not " d. NOVEMBER 26, 191a PUBLICATION RECEIVED. Catalogue. The "Valkyrie" Flying Machine. The Aeronautical Syndicate, Ltd., Collindale Avenue, Hendon, N.W. ® ® © ® RECORDS. Distance and Duration.—Maurice Tabuteau (France), at Etampes, on a Maurice Farman biplane fitted with Renault motor : 465kiloms. (290 miles) in 6h. im. 35s. Speed.—J. Radley (Great Britain), at Lanark,^ on a Bleriot monoplane with Gnome engine : I mile in 47f sees. — 75 "95 m.p.h. Altitude.—Ralph Johnstone (America), at Belmont Park, N.Y., on a Wright biplane fitted with Wright motor: 9,714 feet. ® ® ® ® Aeronautical Patents Published. Applied for In 1909. Published November o.\th, 1910. 25,168. A. BARKER. Flying machine. 25,663. A. E. GEORGE AND R. L. JOBLING. Flying machines. 25,787. W. H. LE MAITRE. Aeroplanes. 27,545. L. CHAUVIERE. Air propeller. Applied for In IQIO. Published November 24th, 1910. 2614-5. H. L., A. E. AND H. O. SHORT. Mechanical flying machines. BACK NUMBERS OF FLIGHT. ALL back numbers, except those specified below, can still be obtained from the publishers, post free, l\d. each, including descriptions and scale drawings of the Voisin (Nos. 33 and 34), Curtiss (No. 27), Cody (No. 34), Farman (No. 42), and Wright (No. 63) biplanes, the Santos Dumont (Nos. 40 and 41), and Grade (No. 50) monoplanes, and of a full-size Wright glider (Nos. 38 and 39). Numbers raised in price, &c.' (Nos. 3 and 4 are entirely out of print) :— No. 4. (Table of Propellers) 6. (Wright Bros.' Ele vator Patents) ... 8. (IllustratedGlossary) 10. (Military Aeronau tics) 12. (Souvenir Supple ment) No. s. d- 3 6 15. (Engines at Olympia) 16. (Prize List and Models at Olympia) 31. (Bleriot Flyer, full- page drawing) ... 2 o 43. \ (Antoinette Mono- (2 6 44. J plane) \2 6 BINDING COVERS, price 2*. 4^. per part, post free. TITLE PAGE and INDEX for Vol. I, 2d., post free. Readers' own copies, bound, price 4^. per part (including I cover, title page, and index, postage extra). Prices of special binding on application. PRINCIPAL CONTENTS. » PAGE Practical Value of the Aerop'ane .. • - - • 96+ Portrait: Mr. W. E. McArdle 965 9peed-Alarms for Flyers .. .. 9&> Duralumin .. .. .. .. .. .. .. • • • • 0^7" Home-made Model for Two-and-Six •• 968. From the British Flying Grounds 969 Royal Aero Club Notes 97* Progress of Flight About the Country 971 Model Hropellers 2 British Notes of the Week 973 Foreign Aviation News .. .. .. •. . - .. 974 Probrem of the Helicopter 6 Airship and Balloon News .. .. .. .. .. .. .. . • 97& Correspondence 979 FLIGHT. 44, ST. MARTIN'S LANE, LONDON, W.C. Telegraphic address: Truditur, London. Telephone: 1828 Gerrardi SUBSCRIPTION RATES. FLIGHT will be forwarded, post free, to any part of the world at the following rates:— UNITED KINGDOM. ABROAD. d. s. d. 2 c. 5 6 11 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 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 direet from the Publishing Office, by forwarding remittance as above. 3 Months, Post Free .. 6 » 2 » » . 1 • .3 . 6 8 1 6 3 Months, Post Free 6 M l> 12 M » 982
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