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Aviation History
1927
1927 - 0128.PDF
FEBRUARY 24, 1927 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.] AN AUSTRALIAN MILESTONE [2153] You may be interested to hear that a memorialhas been erected on the foreshore at Torquay, Victoria, Australia, by the Historical Society of Victoria, to com-memorate the first crossing by air of Bass Strait. This noteworthy flight was, as you will remember, carriedout on December'17, 1919, by Mr. A. L. Long on a Boulton and Paul P.9 aeroplane, fitted with a 90 h.p. R.A.F. 1Aengine. The machine having been fitted with extra fuel tankage, a start was made from Launccston, Tasmania,at about half-past six in the morning, and the journey was safely terminated 6J hours later at Carey's Aerodrome,Melbourne. The journey was not without incident for, when half-way across the Strait, a release, which had been improvised to replenish the engine oil supply, broke, necessitating a landing in a small field immediately after crossing the Australian coast at Torquay. Without stopping the engine Mr. Long jumped out of the machine and opened the oil cock, resuming his flight immediately. Mr. Long carried letters from the Governor of Tasmania to the Governor-General and the Governor of Victoria, also letters from the Lord Mayors of Launceston and Hobart to the Lord Mayor of Melbourne, and from the Chamber of Commerce, Tasmania, to the Chamber of .Commerce, Melbourne. Taking into consideration the relatively low power of the aeroplane, this flight must be considered a valuable pioneering achievement, to which due tribute was paid at the unveiling of the memorial, which took place on November 27, 1926. A. BICKTHORN Norwich, February 15, 1927 PLATES OR FILMS [2154] I have read with interest the excellent article by Major F. A. de V. Robertson on " Air Survey in Chittagong," which appeared in your issue of February 10. May I be permitted to draw attention to a misleading state- ment in this article ? Major Robertson says, " A modified L.B. camera is employed. This camera uses plates, which are essential when stereoscopic photographs are needed, as in the present case." Plates are not essential for stereoscopic photography. Equally good results can be obtained with films. My company showed an example of stereoscopic photography at the Air Survey Exhibit which we prepared, in conjunction with the Air Survey Co., Ltd., for the Dominion Delegates at the Imperial Conference. These stereo photographs were taken from our Ordnance Survey air revision contract, and for this work we employed the Eagle-type camera, which only uses films. The experiment has been successful. We are also using the same camera with films for our air survey in Northern Rhodesia, where stereoscopic comparison of aerial photo- graphs is required for geological purposes. Films are quite suitable—in fact more suitable than plates —for small and medium-scale work, and also large-scale revision work. Plates are essential when dealing with highly accurate large-scale work, especially where it is necessary to contour. The reason for this is that the plate is not liable to distor- tion, due to shrinkage, and therefore forms a more stable base than that provided by the film. The distortion due to shrinkage in the film is so small that it can be ignored for small and medium-scale mapping and large-scale revision work. Films are more easy to handle than plates, and by their use we have been able to reduce air-survey costs. I believe I am right in saying that the views that I have expressed are also held by the Air Survey Committee. H. HEMMING, Managing Director, The Aircraft Operating Co., Ltd. London, February 18, 1927. Anti-aircraft (T.A.) Headquarters and Chelsea ALTHOUGH it is open to much opposition from local residents defending the beauty of their surroundings, there is a proposal of the Army Council's to accommodate two brigades of the anti-aircraft forces of the Territorial Army in the grounds of the Duke of York's Headquarters, Chelsea. Originally they were to be housed in Rochester Row, West- minster, whore a site for the purpose was actually purchased then the economies to be enforced in the Territorial Army for the next financial year cancelled this plan and an alternativt scheme suggested was the reselling of the site, which has no' yet been done, and the erection of cheap light structures in the Chelsea grounds. Institution of Aeronautical Engineers Two papers are to be read before the Institution of Aero nautical Engineers next month, as follows :—March 8 : " Portable Hangars," by Maj. H. N. Wylie, B.Sc, F.R.A.S March 22 : " Aircraft Law," by Mr. Lawrence A. Wingfield. It should be noted that the latter takes the place of Mr. W. Villa Gilbert's paper on " A New Type of Wing Construction.'" NEW COMPANIES REGISTERED AIR PRESS AGENCY, LTD.-Capital £1,000, in £1 shares. Aviationand general news agency, etc. Solicitor : A~. Bolden, 35, New Broad Street E.C'2. BRITISH ANZANI ENGINEERING CO., LTD.—Capital £3,000, in2,000 10 per cent, cumulative preference shares of £1 each, and 20,000 ordinary- shares of Is. each. Motor car manufacturers, makers of aeroplanes, seaplane?,etc. Solicitors : Hancock and Willis. 1, Verulam Buildings, Gray's Inn, W.C.I, CIRRUS AERO-ENGINES, LTD., Regent House, Kingsway, W.C. 2.—Capital £10,000, in £\ shares. Acquiring goodwill of that part only of the business of A.D.C. Aircraft, Ltd., which is concerned with the ma-ufactureof Cirrus aero-engines ; and in conjunction therewith the registered trade- mark "Cirrus," No. 453,271 in Class 6. Solicitors: F. S. Gaylor, 4, OldBurlington Street, W.I. PUBLICATIONS RECEIVED Technical Notes : No. 248.—The Drag of Airships : Drag of Bare Hulls—II. By Lieut. C. H. Havill, October, 1926. No. 249.—Effect of Protruding Gasolene Tanks upon the Characteristics of an Airfoil. By Eastman N. Jacobs. October, 1926. No. 250.—Influence of the Orifice on Measured Pressures. By Paul E. Hemke. November, 1926. No. 252.—Resistance of a Fifteen-Centimetre Disk. By J. M. Shoemaker. December, 1926. U.S. National Advisory Committee for Aeronautics, Washington, D.C., U.S.A. AERONAUTICAL PATENT SPECIFICATIONS (Abbreviations : Cyl. = cylinder; i.c.= internal combustion ; m. = motor.The numbers in brackets are those under which the Specifications will be printed and abridged, etc.) APPLIED FOR IN 1925Published February 24, 1927 26,592. H. Du BOURG DE BOZAS. Wireless-direction finding-apparatus. (250,170.)26,993. L. R. WOODS. Methods of affixing panels and eyelets in fabric surfaces. (264,923.) 27,330. BRISTOL AEROPLANE CO., LTD., and A. H. R. FEDDEN. Balancing ofengines, etc. (264,939.) 27,474. T. D. KELLV. Aircraft. (264,942.)29,174. .1. DE LA CIERVA. Aircraft with rotative wings. (264,963.) 29,630. .1. DE LA CIERVA. Aircraft with rotative wings. (264,965.)29,776. J. DE LA CIERVA. Aircraft with rotative wings. (264,968.) 30,912. Soc. ANON, POUR L'EXPLOITATION DES BREVETS KUNZER. Appa-ratus for lighting landing-place from aircraft. (260,933.) 31,639. C. B. HARRIS. Apparatus for synchronizing discharge of aircraftmachine guns with propeller rotation. (264,985.) APPLIED FOR IN 1926 Published February 24, 1927758. H. O. SHORT. Air-propellers. (264,992.) 18,713. E. DELALE. Carriage bodies. (258,231.) 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 Is. d. 3 Months, Post Free.. 7 7 6 „ „ ..15 2 12 „ „ ..30 4 ABROAD* s. 3 Months, Post Free .. 8 6 , 16 12 „ „ .-33 d. 3 6 0 * Foreign subscriptions must be remitted in British currency. Cheques and Post Office Orders should be made payable to Proprietors of "FLIGHT," and crossed Westminster Bank. Should difficulty be experienced in procuring " FLIGH from local newsvendors, intending readers can obtain each is direct from the Publishing Office, by forwarding remittance above. he 108 • • -^^g=afca^»-^assJtts!afflassa:a6S31:.23 ^a*»!wiy"--»JHifeajns
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