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Aviation History
1912
1912 - 0230.PDF
[AJGHT Scottish Aeronautical Society were also present. On ist inst., Mr. A. Forson opened a discussion on " Chassis Design," and many points of interest and importance of this useful member were thoroughly discussed. On Saturday forenoon Mr. Balden's hydro-aero got off the water. Rising in about 10 sees, to a height of 15 ft. it made a remarkable flight which ended in the trees at the opposite side of the pond. Mr. Arthur also made some flights from the water. In the afternoon there was a model flying meeting at Ibrox. Good flights by Messrs. Balden, Langlands, Graham and Boyd. Mr. Gordon was kite-flying. Afterwards some remarkable model flights were made by Messrs. Balden and Langlands from the hill in Bellahouston Park. The third competition for the aggregate prize Saturday, the i6th, at Barrhead Aerodrome. Events, distance and duration. The second half of the session has now commenced and intending members can now be enrolled. Subscription for half session ending September, 4s, Full particulars from the hon. sec, Mr. W. Foster, Koclietle, Limeside Avenue, Rutherglen. Worcester Model Aero Club (Sec., S. A. SEARS, VICTORIA INSTITUTE, WORCESTER). ON 2nd inst. only those possessing high-powered models could battle against the strong wind which blew half a gale. Mr. Pollard raised the club record to 220 yards. Competition was postponed to -the 9th, at usual meeting on Pitchcroft at 3 o'clock. Sheffield Model Aero Club (Hon. Sec. C. F. W. CUDWORTH, (35, PENRHYN ROAD, SHEFFIELD). A GENERAL meeting of the club at " Broomhead's " Dining Rooms, Leopold Street, March 14th, at 7.30 p.m. All interested In aeronautics and model flying invited to attend. One of the main items on the programme is that the secretary will give away to those present detail drawings for making a successful flying monoplane designed by Mr. T. 1'ashley, who will also be pleased to give any further instructions for constructing the same. Some aeronautical literature will also be given away. Next model flying 'Competition probably on Easter Monday. Yorkshire Ae.C. (Model Section) (SA, HULLAND ST., LEEDS). ON February 27th, Dr. Vaughan Bateson, of Bradford, gave a lecture on " Flight : Past, Present, and Future." Mr. S. A. Hirst, Chairman of Y. Ae. C. in the chair. Dr. Bateson spoke upon the most important events of the past three years, showing the remarkable advance in the science of Aeronautics during that period. Both the aeroplane and airship were freely dealt with, interest being added by the speaker relating a few of his experiences in both classesof air craft. At the close of the meeting, a vote of thanks was unanimously passed to Dr. Bateson for his most interesting chat. On March 12th, at the Hotel Metropole, Mr. Robert Blackburn, of the Blackburn Aeroplane Co., Leeds, will speak on "Pickings from Practical Experience " at 8.30 prompt. The secretary would be very pleased to hear from young men in Leeds and District interested in matters aerial, with view to increasing membership. ® ® ® ® CORRESPONDENCE. Correspondents communicating with regard to letters which have appeared in FLIGHT, would much facilitate ready reference by quoting the number of each letter. Twin Propellers. [1505I It is understood that where two propellers (or tractors; are used on an aeroplane, as shown in FLIGHT, page 29, there is a certain amount of loss ; that is, for double the horse-power something less than double the thrust would be obtained. Can anyone tell me what is the percentage of loss, and whether it is constant ? Also, irj a vol plan,' does the propeller revolve or not ? and if not, what resistance does it offer to the machine? ENGINEER. Soaring Flight. [1506] In carrying out experiments with a model glider of new design, I found that it possessed the faculty of soaring flight, and in the apparent absence of wind rather than in its presence. I was somewhat surprised at this, and began to study the conditions which produced this soaribility, and observed that it was manifested in the most marked degree in bright sunshine following a heavy dew or light showers, and that it was generally apparent in some degree when the atmosphere was moist and the temperature rising. From these observations I came to the conclusion that soaribility was associated with the expansion of the water vapour present in the atmosphere, and from experiments ascertained that under certain conditions, the passage of a body through water vapour, hastened its expansion and caused some electrical action to take place. On reading of Dr. Hankin's explosion or decomposition theory, MARCH 9, 1912. it appeared that my observations and conclusions were m part in agreement with his, and I should now be greatly interested to know if any particular degree of moisture would be present in the country and under the condition in which Dr. Hankin observed soaring flight in the apparent absence of wind. I have reason to suppose that the more ranfied is the water vapour the more readily does it expand on being disturbed, when the tem perature of the air carrying it is rising, and tins would account for what is, I believe, the fact, that soaring flight, m the absence of wind in any quantity, is only possible at a certain altitude. Hampton-on-Thames. C WALPOLE DRURY. Bird Flight. [1507] Now that we are all discussing with interest Dr. Hankin's observations and theories, the following observation may be of interest to your readers. On Sunday, February 4th, I was walking along the shore of the Forth, near Granton, when I noticed two gulls circling exactly like hawks, rising higher and higher without any flapping, except one or two slight flicks when going to windward. Their paths were in opposite directions and intersected each other. It was one of those bright frosty days when your hair crackles with electric discharges when it is brushed. In fact, I specially noted this fact on the present occasion. The wind was very slight and from the south. Snow on the ground. The gulls worked gradually to windward. I have watched their flight for two or three months but never noticed anything so hawklike in their movements. Edinburgh. J. C. ANTINORI, A.M.I.C.E.— (Other correspondence is held over owing to pressure on our pages). ® ® ® ® PUBLICATION RECEIVED. "Off for the Honeymoon." Two-Step. By Carlotta Rowe. London: Metzler and Co., 42, Great Marlborough_ Street, W. Price 2.f. net. ® ® ® ® Aeronautical Patents Published. Applied for In 1911. Published March fjthi 1912. 7i593- —' AYLESBURY. Instinctive gravity control for flying machines. 8,326. A. WENDTLAND. Airship. 9,691. V. ALEXIKFF. Steering, or direction-recording apparatus. 13,959. G. GLUECKSMANN. Driving device for airships, &c. 18,123. R. ESNAULT-PELTEKIE. Landing devices. 20,902. V. P. AMILHAU. Projectiles for military aviation. 25,930. M. KALABA. Aeroplanes. The Index to Vol. Ill of FLIGHT (1911) is now ready. Price 3d. (post free 4d.) of the Publishers, 44, St. Martin's Lane, W.C. PRINCIPAL CONTENTS. Editorial Comment Britain Moving at Last. The Short Monoplane. (With scale drawings) ... An International Parliament of Flying The Aviation Grant—the New Flying Corps Aeroplane Undercarriages. By G. de Havilland Royal Aero Club Notes ..." From the British Flying Grounds Military Airships. Lieut. C. M. Waterlow, R.E. World's Records Air Eddies. By " Oiscau Bleu " Foreign Aviation News Models. Conducted by V. E. Johnson, M.A. ... Progress of Flight about the Country Correspondence PAGE 2IO 215 2l6 217 220 223 222 223 234 22S 227 228 23D FLIGHT. 44, ST. MARTIN'S LANE, LONDON, W.C. Telegraphic address: Truditur, London. Telephone: 1828 Gerrard. SUBSCRIPTION RATES. FLIGHT will be forwarded, post free, to any part of the world at the following rates:— UNITED KINGDOM. ABROAD. s. d. 3 Months, Post Free 6 » 11 12 1 8 3 3 6 6 3 Months, Post Free... 6 „ „ 2 j> ii s. a. 2 9 S 6 11 0 Cheques and Post Office Orders should be made payable to the Proprietors of FLIGHT, 44, St. Martin's Lane, W.C., and crossed London County and Westminster Bank, otherwise no responsibility will be accepted. 230
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