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Aviation History
1912
1912 - 1126.PDF
(fjJGHT •creates a " balance " of the positive pressure, which acts from the front when the velocity increases, and from the rear when the velocity decreases. It may also be useful to note, in connection with the action of a wing, that the operation of this term dwindles •and ceases with respect to pressures at points of the section near the vertex of the curve, where, therefore, the variation simply follows the variation of v8 (-?> In the figure, the larger circle represents the section of the cylinder, the diameter AB of the smaller circle represents 2pV2. OB= 1/4AB. To find the pressure at any point (P), join P to A by a straight line cutting the smaller circle at the corresponding point />),\a.nd from / draw the perpendicular px. The pressure is repre sented by Ox, and is positive if x falls lietween O and B, and negative if x falls between O and A. Leeds. ARTHUR RAMSDEN. Gyroscopes as Stabilisers. jl682] *M I wish to say a few words about the much discussed subject of " Automatic Stability" and its po sibilities. f The chief difficulty appears to be to find a gyroscope which will always remain parallel to the earth's surface, regardless of the move- FIG I. ^±. T 1 FIG 2 nients of the aeroplane. In solution of this I am enclosing a blue print of a gyroscopic apparatus, on which patents are pending. The chief features of the invention are as follows :— It consists of five gyroscopic units h) running in the vertical and mounted on a common vertical shaft (a), which is set in bearings above and below so as to give free motion around the common centre. The gyro-wheels are driven by electric motors (*), and the whole mechanism is enclosed in a case and mounted on gimbals on the aeroplane. Now by mounting a specially designed set of control levers on the .top of this case the aeroplane is under the direct control of the NOVEMBER 30, 1912. pilot • but at the tame time, should any sudden gusts of wind throw the machine into a dangerous angle—the gyroscopes would maintain the equilibrium-should the pilot not act quickly enough. Park Lane. C. KINGSLEY-FIELD. ® ® ® ® AERONAUTICAL SOCIETY OF GREAT BRITAIN. Official Notices. Election of Foreign Member.—The following has been elected a Foreign Member of the Society : Capt. H. E. von Simson. Meetings.—The third meeting of the Society for this session will be held on Wednesday, December nth, at 8.30 p.m., at the Royal United Service Institution, Whitehall, when Dr. R. T. Glazebrook, F.R.S., Director of the National Physical Laboratory, will preside. Mr. E. H. Harper, M.A., will read a paper, to be followed by a discussion, on "The Mathematical Theory of Aero plane Stability." An endeavour will be made to expound as simply as possible the theory of stability due to Professor G. R. Bryan. Students.—Students attending regular science, engineering, or aeronautical courses at recognised technical colleges, as well as those pursuing the scientific side of aeronautics professionally, are eligible for the Students' Section, and should apply immediately if desirous of being admitted without entrance fee. The studentship is a branch of the technical side of the Society, which affords a technical status to those admitted thereto. Students may attend all meetings, receive the Society's publications, are admitted at half the usual membership fee, and are exempt from payment of entrance fee on transferring to Associate Fellowship. BERTRAM G. COOPER, Secretary. ® ® ® ® Tests with the Handiey Page Monoplane. DURING the last two week-ends the new 70-h.p. Handiey Page monoplane ha* been pretty well tested, and some 25 passengers, including two ladies, have enjoyed the experience of a trip on it. As referred to elsewhere, on Sunday last the machine was flown over to Brooklands with Mr. Trevor Handiey as a passenger, and in the stop near Sunbury, owing to a choked petrol pipe, the machine planed down splendidly from 2,000 ft. It alighted in a ploughed field which was so soft that the wheels sank up to the axles, and this incidentally showed up the good qualities of the chassis for cross country work, as both landing and rising from soft fields seemed no different to an ordinary landing in an aerodrome. The trip to Brooklands occupied i"]\ minutes and the return journey 23 minutes. An unofficial test was made of the climbing powers of the machine with two passengers up, and two hours' supply of fuel, &c. ; the propeller, however, was not suited to the engine and climbing speed was only 200 feet a minute for the first 1,000 feet. Altogether about 150 miles were flown on Sunday without any special incident happening. ® ® ® ® NEW COMPANY REGISTERED. British Anzani Engine Co., Ltd., 30, Regent Street, W.— Capital £3,000, in £1 shares (1,500 Founders'). ® ® ® ® Aeronautical Patents Published. Applied for In i»ia. Published November <2%th, 1912. 4,292. 6,818. J. SCHOTTK. Framework of airships. L. MARMOKIER. Automatic stabilisation of aeroplanes. J- S. PARKER, Apparatus for aerial photography, FLIGHT. 44, ST. MARTIN'S LANE, LONDON, W.C. Telegraphic address : Truditur, London. Telephone : 1828 Gerrard. SUBSCRIPTION~~RATES. FLIGHT will be forwarded, post free, at the following rates :— UNITED Kmrsnn*. i _ * KINGDOM. 3 Months, Post Free , 12 s. 3 7 IS ABROAD. 3 Months, Post Free .. 6 .. 12 s. 5 10 20 d. o o o 126 Cheats and Post Office Orders should be made payable to the Proprietors of FLIGHT, 44,.St. Martin's Lane, W.C., W crossed ZuKSffL W ***"•*"*«*. "th.wise no responsibility Should any difficulty be experienced in prvurine FLIGHT fom ZonTpltZ' "nT*"f 7aderS ^'"btain Lk issue Let <rom the Publishing Office, by forwarding remittance as above.
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