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Aviation History
1926
1926 - 0026.PDF
" PROFESSIONAL NOTES," No. 42 THE Air Ministry, Meteorological Office, has just issued " Professional Notes," No. 42, under the title of " The Inves- tigation of the \\ inds in the Upper Air from Information regarding the Place of Fall of Pilot Balloons and the Distri- bution of Pressure," by J. Durward, M.A. This note dis- cusses the horizontal displacement of pilot balloons in relation to the distribution of pressure. The data used are obtained from post-cards, on which the date, place and time of origin are entered, attached to pilot balloons. These balloons are released three or lour times a day at many stations, and the finder is requested to return the card after entering the place and time of finding. During 1923, over 1,000 cards were returned, and it is found that on about 80 per cent, of these occasions the direction of the displacement of the balloon was within 40 deg. of the direction of the surface isobars. Certain cases are noted in which the direction of displacement differs very much from the run of the surface isobars ; these cases are generally found to be associated with low-pressure systems. On the south side of the centre of a depression the westerly wind may attain a very high speed ; one definite case was found in which the maxiumm speed at 25,000— 30,000 ft. must have been over 200 miles per hour. This method of investigation is attended by so many uncertainties, that it is on the whole inferior to the careful observation of high clouds. On the other hand, it is practicable in all weathers. Copies of the publication can be obtained from all branches of H.M. Stationery Office, or through any bookseller. Price 15. 6d. Postage \d. extra. m m m m Air Mails during 1925 THE Postmaster-General communicates the following particulars of outgoing British Air Mail traffic during 1925. There has been an increase in the total weight of letter mail during the year, and the total weight despatched by air has now risen to 15,520 lbs. The increase has been most marked in the mails to Paris and to Morocco and Algeria, which have increased by 19 per cent, and 33 per cent., respectively. By the latter service 2,500 lb. of letters were despatched during the year. One of the heaviest of the letter mails is that for unoccupied Germany (Hanover, Berlin and Hamburg). This increased by over 10 per cent. ; and the mails for Belgium, and for Denmark, Norway and Sweden also showed increase. Considerable use was made of the air services established in Continental countries to supplement the service afforded bv Imperial Airways where necessary ; and new letter air mails were instituted to the East Baltic countries and Russia, the latter of these attracting as much as 680 lb. of letters in the four months of 1925 during which it was in operation. This service has occasionally been used in the inward direction for mails from the East brought by the Trans-Siberian Railway ; the course of post from Shanghai to London has thus been reduced to about 15 days. Facilities for using the New York-San Francisco air mail service were also made available in May last, but hitherto little use has been made of the service. The Cairo-Baghdad service has worked with marked regularity. It continues to carry a considerable volume of mails in spite of the competition of the trans-desert motor service between Haifa and Baghdad. The air parcel service con- tinues to carry a substantially greater volume of mails than the letter service. The total weight of the parcel air mails on the whole of the Continental services in operation was 50,000 lb., apportioned among the several services as follows : Paris, express 13.600 lb.. non-express 10,200 1b.. Holland 13.200 11,. ; Germany, including the Rhine \rmv, 13,000 lb. The Aero Golfing Society THE following is a list of fixtures of the above .society for 1926 :— March 1.—Team Match, Ae.G.S. v. Stage Golfing Society, at Oxhey Golf Club. March 18.—"Winter Meeting, at Addington Golf Club, for Ae.G.S. Challenge Cup, presented 'by Sir Samuel Instone. April 10.—Team Match, Ae.G.S. v. Moor Park Club, at Moor Park, Kickmansworth. May 6.—Spring Meeting, at Huntercombe Golf Club, for Ae.G.S. Challenge Cup, presented by the proprietors of FLIGHT. June 12.—Team Match, Ae.G.S. v. Frilford Heath Golf Club, at Frilford Heath, near Abingdon. July 15.—Team Match, Ae.G.S. v. R.A.F. Club (course to be arranged). October 14.—Autumn Meeting, at Wentworth Park, Virginia Water Golf Club, for Ae'.G.S. Challenge Cup, presented by Cellon (Richmond), Ltd. JANUARY 14, 1926 COMPANY DOINGS The De Havilland Aircraft Co., Ltd. THE annual meeting of the de Havilland Aircraft Co., Ltd., was held on December 22, at which the chairman Mr. A. S. Butler, said he was pleased to state that the very successful results hitherto attained had been well main- tained, and that there was a substantial increase in turn- over made since the formation of the company five years ago. Referring to the more particular records of the past year, he drew attention to, firstly, the production of the Moth " (D.H.60) light aeroplane, which was produced in response to the growing demand for a machine on which flying training could cheaply and efficiently be carried out by the light aeroplane clubs. He was pleased to say that these machines had given every satisfaction, and further- more, there were already two private owners of " Moths." Secondly, he referred to the highly successful flight by Mr. Cobham, on a D.H.50, to India and back, carrying Air Vice-Marshal Sir Sefton Brancker. It was due entirely to the proved efficiency of these machines, as evinced by this and previous nights, that they were now being built under licence in Belgium. Czechoslovakia, and Australia. The chairman then referred to the growing demand for the com- pany's products from all parts of the world. Both military and civil sides of the company's business had been developed together. A resolution to pay a dividend of 10 per cent, was passed unanimously. Rolls-Royce, Ltd. THE directors, in their nineteenth annual balance sheet and report for the year ended October 31, 1925, state that after paying or providing for all trading expenses and suitable depreciation of buildings, machinery and plant, and charging repairs and replacements to revenue, there is available for distribution the sum of £165,722 lls. Ad., together with the amount of /18.671 16s. Id. carried forward from the previous year. The usual rate of depreciation has been applied to the value of buildings and plant. Both the company's models, the " New Phantom " (40-50 h.p.) and the new 20 h.p. chassis, and their aero engines, continue to be in great demand. The directors recommend a dividend of 8 per cent, per annum (subject to income tax), /65,102 19s. 3d. ; transfer to income tax account, ^25,000 ; to reserve fund, /75,(l()0 ; and to carry forward to next year, - 19,291 8s. 2d. 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 will be printed and abridged, etc.APPLIED FOR IN 1924 Published January 14, 192621,994. S. K. SAUNDERS. Flying-boats, etc. (224,520.) 25.432. DOUGLAS MOTORS. LTD., and S. L. BAILEY. Engines. (244,558.) 25.433. DOUGLAS MOTORS. LTU., and S. L. BAILEY. Mechanical startingdevices for engine?. (244,559). 26,544. M. WOLF and A. MERTZ. Portable or other engines. (244,564.)27,711. C. H. CLAL-DEL. Aeroplanes. (244,569.) APPLIED FOR IN 1925Published January 14, 1926 11,226. Liiftschiffbau Zeppelin (its. Rigid airships. (240,406.) Secret Patent Re-assigned to the Inventor APPLIED FOR IN 1918 Published January 14, 1926541. A. M. Low. Aerial Projectile. (244.25H.I 5,632. A. M. Low. Control of torpedoes, i-tc. (244,302.) 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 ABROAD* s. d. s. d. 3 Months, Post Free.. 7 7 3 Months, Post Free .. 8 3 6 „ „ ..15 2 6,, „ ..16 6 12 „ „ ..30 4 12 „ „ ..33 0 • Foreign subscriptions must be remitted in British currency. Cheques and Fosl 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 a> above. 26
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