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Aviation History
1927
1927 - 0840.PDF
OCTOBER 27, 1927 CORRESPONDENCE WING RADIATORS [2161] Looking at some old photographs taken about 17 years ago, it is very interesting to see how a practice then in existence, which apparently for years has been discarded, is now returned to by some of our best designers, particularly on high-speed machines. The feature I am speaking of is having a flat surface radiator underneath the centre section of the wings of the " Valkyrie" monoplane. This is very much like the practice of the surface streamline radiators now fitted to some of our fastest machines. I believe the radiators were built for Mr. Barber by Lamplughs. It shows that we, as pioneers in those days, had a few ideas, but looking at the machine on which I took my ticket now, it is inclined to give one a night-mare. It would be interesting to know what other surface radiators of that type were fitted. I think Mr. Barber would certainly have the claim of being first in the field. October 21, 1927. C. F. M. CHAMBERS THE GUGGENHEIM COMPETITION [2162.] I have read with much interest your editorial comments of June 16, and the views of various eminent engineers in your issues of June 23 and July 28 on the Safe Aircraft Competition. Our technical advisers are preparing a note on the under- lying technical problems of this competition, which will, no doubt, be of interest to -our correspondents, but pending publication of this note, I should like to have the privilege of answering certain points that have been raised in regard to the actual conduct of the tests involved. Major F. A. Bumpus speaks of " the extreme difficult)' of obtaining a really fair comparison of merit as regards stick and unstick tests due to inevitable variation of wind." This difficulty has been fully foreseen by our technical advisers. If absolutely calm air is not obtainable tests of this character will be repeated under different wind conditions and curves of distances plotted against wind speed. Preliminary tests on a service plane and comparison with formulae indicate that such a method will eliminate any possibility of unfairness. In regard to tests of manoeuvrability on the ground, Major Bumpus is quite correct in thinking that with a variable aerofoil machine, the wings would be set as for a slow-speed trial. Major Bumpus further questions the advisability of all tests being carried out by the Fund's pilots and not by the entrant's pilot. In this regard I would like to quote Section 5 of Appendix 5. " All tests in the Competition will be carried out by pilots supplied by the Fund but contestants shall be given reasonable opportunities for instructing the Fund's pilot in the flying of their aircraft prior to the commencement of the tests." \\ e must not forget that the object of the Competition is to ensure a plane which shall have desirable characteristics that can be developed by any pilot of average skill. Also if the Fund's pilots, observers and technical advi- sors are apparently at fault in any portion of the tests, contes- tants will have the right to appeal to the judges. New York, October 14, 1927. HARRY F. GUGGENHEIM Mobiloil " Not Guilty " Ix connection with the account of the Zurich Meeting, published in FLIGHT of September 1, 1927, and in which appeared a statement to the effect that the German pilot Herr Lusser had had trouble with the Mobiloil in his Mercedes engine, we have received from the Vacuum Oil Co., Ltd., a communication pointing out that this was incorrect. That firm has received from Herr Lusser, of the Leichtfiugzeugbau Klemm of Sindelfingen, a letter, the translation of which reads as follows :—" Herewith I am glad to state that a notice in FLIGHT of September 1, 1927 is based on an error. On the occasion of the ' International Flying Meeting in Zurich ' I was not using Gargoyle Mobiloil. Therefore the lubrication trouble encountered cannot be traced to your oil. Respect- fully Yours. (Signed) Robert Lusser." We are thus very glad to be able to correct any erroneous impression that may inadvertently have been created. Sqdn.-Ldr. Reid Forming a Company WE are informed that Squadron-Leader G. Reid is form- ing a company to market his various patents, including the very successful Pilot Testing Device. Mr. Fred. Sigrist of the H. G. Hawker Engineering Co., Ltd., is actively interested in the venture, and his practical experience and business acumen will be of great assistance. "THE ROYAL AERONAUTICAL SOCIETY" WITHWHICH IS INCORPORATED "THE INSTITUTION OF AERONAUTICAL ENGINEERS" Official Notice. Silver Medal.—The inaugural meeting of the Council of the amalgamated,body was signalised by the award of the Society's Silver Medal to Mr. R. ]. Mitchell, A.F.R.Ae.S., Capt. G. S. Wilkinson, A.F.R.Ae.S.. and Mr. \ A. RailiA.F.R.Ae.S., the three designers most concerned with the production of the S.5 which recently won the Schneider Trophy and broke the world'sspeed record for seaplanes. J. LAIKENCE 1'KITCHARD, Secretary IMPORTS AND EXPORTS, 1926-1927 AEROPLANES, airships, balloons and parts thereof (not shown separately before 1910). For 1910 and 1911 figures see FLIGHT for January 25, 1912. For 1912 and 1913, see FLIGHT for January 17, 1914. For 1914, see FLIGHT for January 15,1915, and so on yearly, the figures for 1926 being given in FLIGHT, January 20, 1927. Imports. Exports. Re-Exports. 1926. 1927. 1926. 1927. 1926. 1927. £ £ £ £ Li Jan. .. 494 1,850 130,049 49,021 — — Feb. .. 2,089 679 40,416 63,080 6,341 — Mar. .. 1,001 7,087 92,840 106,478 9,758 2,270 Apr. .. 536 822 160,832 71,190 5,051 785 May .. 342 1,258 118,539 82,708 — 640 June..24,866 1,249 66,111 149,907 150 162 July.. 16,033 1,798 39,047 104,167 — 750 Aug. ..21,401 2,453 146,129 78,742 1.035 — Sept... 3,172 2,045 55,674 61,946 — 59 69,934 19,241 849,637 767,239 22.335 4,666 PUBLICATIONS RECEIVED The Beginnings of Organised Air Power. By J. M. Spaight. Longmans, Green & Co.; Ltd., 39, Paternoster Row, London, E.C.4. Price Us. <od. net. India by Air. By the Rt. Hon. Sir Samuel Hoare, Bt., G.B.E., C.M.G. Longmans, Green & Co., Ltd., 39, Pater-, noster Row, London, EC.4. Price 6s. 6rf. net. Songs in The Darkness. By Arthur Bennett. The " Sun- rise " Publishing Co., Upper Bank Street, Warrington. Price 5s. net. m m m m AERONAUTICAL PATENT SPECIFICATIONS (Abbreviations : Cyl. — cylinder ; i.e. — internal combustion ; m. = motor The numbers in brackets are those under which the Specifications willbe printed and abridged, etc.) APPLIED FOR IN 1936 Published October 27, 1927 14,058. A. LAMBLIS. Diaphragm pump. (255,427.) 16,353. SIR. W. G. ARMSTRONG, WHITWORTH AND CO., LTD., H. W. LEE and R. MORRISON. Means for taking-up leash in the transmissionof motion. (278,(>74.) 20,001. DOT'GLAS MOTOR?, LTD., and C. G. PLXIIN. lixing of magnetos on i.e. engines. (278,14(1.) APPLIED FOR IN 1927 Published October 27, 1927 7,090. .1. L. MACVICAR. Aircraft. (278,250.) 12,407. BRITISH THOMSOX-HO: sros Co., LID. Superchargers for i.e.engines. (271.074.) FLIGHT, The Aircraft Engineer and Airships 36, GREAT QUEEN STREET, KINGSWAY, W.C.2. Telephone : Gerrard 1828. Telegraphic address : Truditur, Westcent, London. "FLIGHT" SUBSCRIPTION RATES UNITED KINGDOM s. 3 Months, Post Free.. 7 6 15 12 30 • Foreign 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 Westminster Bank. 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 tu above. d. 7 2 4 3 6 12 ABROAD* Months, Post Free s. ~ 8 ..16 ..33 d. 3 6 0 756
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