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Aviation History
1921
1921 - 0708.PDF
OCTOBER 27, 1921 -•/.":• • . "T: '•••-•; .' •• -J ' With the final tin. Mr. John Cates saw to it that there should be no lack of "Shell " for the Avro on board the " Quest" against the time of her arrival in the Antarctic, for whicti she started recently. H •H H H m m H H H H m H EI1HHI3EII30E! CORRESPONDENCE [The Editor does not hold himself responsible for opinions expressed by correspondents. The names and addresses of the writers, not necessarily for publication, must in all cases accompany letters intended for insertion in these columns.] EDINBURGH AERO CLUB [2046] We beg to ask this letter to appear before your Edinburgh district readers with a view to completing a membership which is, at present, inadequate to call a definite business meeting. The Club's object in aerial activities intends covering a most interesting programme, and model craft, kite photo- graphy and man-sustaining gliders will prove ample scope for all aerial enthusiasts. Intending members should write to me at the address below, when further particulars will be sent. A. CRAWFORD, Secretary 45, South Clerk Street, Edinburgh m m m m SOME NEW AERODYNAMICAL RELATIONS REPORT NO. 114 of the American National Advisory Committee for Aeronautics, entitled " Some New Aero- dynamical Relations," by Max M. Munk, contains three new relations extending the modern theory of aeronautics, intended to be applied in some later papers. They deal with phenomena in a frictionless fluid. The first part contains a relation between the power absorbed by an aerofoil, and the power absorbed by a propeller. In the second part the exactness of the ordinary formula for the induced drag of an aerofoil is examined, and the error is determined. In the third part the author shows that for the calculation of the air forces on bodies of considerable volume the imaginary ' sources and sinks equivalent to the flow around the body can be used in the same way as vortices are used for the calculation of lift and induced drag of wings. A copy of Report No. 114 may be obtained upon request from the National Advisory Committee for Aeronautics, Washington D.C. PUBLICATIONS RECEIVED Report No. 121. The Minimum Induced Drag of Aerofoils. National Advisory Committee for Aeronautics, Navy Building, Washington, D.C., U.S.A. Technical Note No. 64. N.A.C.A. Recording Air Speed Meter. By F. H. - Norton. National Advisory Committee for Aeronautics, Navy Building, Washington, D.C., U.S.A. La France, No. 1. A Review of the French Press, published (weekly) by Evans Brothers, Ltd., Montague House, Russell Square, W.C. 1., Price zd, " AERONAUTICAL PATENT SPECIFICATIONS Abbreviations : cyl. = cylinder : I.C. = internal combustion ; m. = motors Tue numbers *n brackets are those under which the Specifications will be printed and abridged, etc. APPLIED FOR IN 1920 ; Published October 27, 1921 9,684. VICKERS, LTD., R. K. PIERSON and T. S. DUNCAN. Tail skids. (169,472.) 17,615. KAOUI., MARQUIS OF PATERAS PKSCARA. Helicopter. (146,265.) 18,931. H. ROUND, A. H. PARROTT and R. H. DAVIS. Aviators' headcoverings. (169,544.) 19,011. FAIREY AVIATION CO., LTD., and C. R. FAIREV. Aeroplanes and seaplanes. (169,547.) 19,218. GOODVEAR TYRE AND RUBBER CO. Balloons. (147,161.) APPLIED FOR IN 1921Published October 27, 1921 1,160. ZEPPEMNWERK LINDAU GEC. and C. DORMER. Ribs and framing foraircraft hulls, etc. (157,266.) 23,350. LUFTFAHRZETGBAU SCHUTTE-LANZ. Gas discharge for rigid airships. (168,601.) ; If you require anything pertaining to aviation, study I "FLIGHT'S" Buyers' Guide and Trade Directory, I which appears in our advertisement pages each : week (see pages iii and xiv). NOTICE TO ADVERTISERS All Advertisement Copy and Blocks must be delivered at the Offices of "FLIGHT," 36, Great Queen Street, Kingsway, W.C. 2, not later than 12 o'clock on Saturday in each week for the following week's issue. 708 FLIGHT The Aircraft Engineer and Airships 36, GREAT QUEEN STREET, KINGSWAY, W.C. 2. Telegraphic address: Truditur, Westcent, London. Telephone: Gerrard 1828. SUBSCRIPTION RATES' " FLIGHT " will be forwarded, post free, at the following rates :— UNITED KINGDOM s. d. 3 Months, Post Free.... 7 7 6 „ , 15 2 12 „ „ .... 30 4 These rates are subject to any alteration found necessary under abnormal conditions and to increases in postage rates. • European subscriptions must be remitted in British currency Cheques and Post Office Orders should be made payable to the Proprietors of " FLIGHT," 36, Great Queen Street, Kingsway, W.C. 2, and crossed London County and Westminster Bank, otherwise no responsibility will be accepted. ABROAD* s. d. 3 Months, Post Free.... 8 3 6 „ , 16 6 12 „ 33 °
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