FlightGlobal.com
Home
Premium
Archive
Video
Images
Forum
Atlas
Blogs
Jobs
Shop
RSS
Email Newsletters
You are in:
Home
Aviation History
1910
1910 - 0734.PDF
f/UGHTJ Once the danger-point is reached, the sound produced by the whistle, M, does not cease till the speed has been reduced to its normal, but increases in proportion to the velocity of the current of air. The nuts, H, and the set-screw, D, permit of a perfectly accurate indication of the velocity of the current of air being obtained. L. E. EEMAN. [8] The accompanying sketch of speed alarm shows a simple and cheap device. It is just a continuous-ringing clockwork bell, which can be bought at is. id., clamped on to the strut, and a washer soldered on to the push. The washer, D, should have its sides bent up, as shown at E, then soldered on to the push of the bell to prevent the arm of the wind or pressure-board from sliding off sideways and the stop at bottom bracket will prevent the arm from coming forward. A is the pressure- board, which can be of wood. B is the push of the bell, where the arm will ring the bell. C is the bearing of the arm. The adjusting can be done by moving either the bell or the pressure-board up and down the strut. Gateshead-on-Tyne. JAMES COWAN. [9] My suggestion or a speed alarm is a simple modification of what is called, I believe, a " mouth siren." It consists of a tube affixed to a funnel. AB is a perforated disc fixed in the tube, which, together with a support, DC, constitutes the bearings of the free disc, EF. This disc is set with holes corresponding to those on AB, but with small slanting vanes fixed on the back. These cause EF to revolve, and a note is evolved which rises in pitch with an increase of speed. Chester. H. BEST. [10] The device for a speed alarm illustrated by the accom panying sketch operates as follows:— A propeller-fan, A, rotates the shaft, B, at a speed proportional to flight, and the shaft, B, carries a centrifugal governor device with SEPTEMBER 10, 1910. weights, F, that fly outwards and touch the adjustable cone, C, thus- making an electric contact whereby the electric bell, N, will start ringing. The adjustment of the cone, C, enables the speed at which the bell will ring to be regulated. The summary of reference letters below will show the purpose of the other members :— Southport. F. WEARDEN. A, fan driving shaft (B); B, shaft carrying spring governor which revolves in cylinder (C and D) 5 C and D, cylindrical covers, C screws inside D for adjusting purposes; E, round disc made of fibre or other insulating material, with a recess in one side which carries brass ring (I) j F, weights fastened to spring (G), which swing out to bigger radius when going a good speed: G, thin, flat springs, connected to brass ring (I) with screws, which also hold ring in place; H, small disc made of fibre to insulate springs from shaft; the disc is made to slide on shaft to allow weights and spring to swing out; I, brass ring let into fibre disc (E) to make electrical contact between terminal and spring governor (G and F); I, brush to carry current from terminal (K) to brass ring (I); K, terminal which is insulated from casing; L, terminal to battery or dry cell; M, dry cells; N, electric bells. OUR SPEED-ALARM COMPETITION. Letters accompanied by descriptions and drawings are acknow ledged from:— R. E. Pearson P. A. Hunt W. Read R. Barga J. W. Wise H. A. Stallon A. H. Bell A. A. Mackintosh Frank Roberts E. G. Evans R. M. Hill and A. H. Clifton S. T. Smith G. T. R. Hill M. Bruce Ross J. M. Boyd E. V. Gratze J. C. Brooke C. G. L'Estrange W. Mitchell A. Podger Malone Bertie Bradbury J. A. Dalby D. H. Thomson J. Martin W. A. Dickson A. Sweeney C. Burrell H. Warrington A. D. Turner D. Waterhouse Arthur Pugh A. R. Willmott W.W. E.vonHemert E. Warde Fox T. Lancaster Harold Smith W. Langdon Davies B. Whalley John G. Merne and D. W. Ostle Noel Vernham W. Little H. Warrington J. Cunningham S. C. Shepley-Part A. Cochran Herdman E. Ramsden W. Smyrk R. H. Peach L. Weller BRITISH AVIATORS IN AMERICA. BY cables received from New York Mr. Grahame-Whit* appears to have taken the American public by storm. Not only has his splendid mastership of his aeroplane impressed itself upon the Bostonians, but his unaffected charm of manner has placed him in the front rank as favourite at the Boston Aviation Meeting, where he has already made his mark in no half-hearted degree, beating all his competitors with ease. Especially has he scored in the bomb throwing event, in which the points secured by him on the first day were 44, against Glenn Curtiss' 27, Charles Willard's 11, and Ralph Johnstone's 2. Mr. Willard on the opening day of the meeting made himself popular by taking Miss Phoebe Dwight as passenger into the air for a goodly spin. Mr. Grahame-White, not to be outdone, carried Miss Marie Campbell, and in this again he scored heavily by attaining a considerable altitude, at least twice that of Mr. Willard. FLIGHT AT MALAGA. EXHIBITION flights continue at Malaga, Mollieu last week making some fine trips over the sea, whilst Jullerot on his Henry Farman has been daily making his mark at the aerodrome. On Thursday, Mollieu circled over the British vessels which were cruising from Gibraltar, in the course of his flight round the light house and Malaga Cathedral, Jullerot following him up over the Mediterranean, and joining with him in hovering over the Piazza during a bull-fight, the pair then returning to the aerodrome, where they descended in front of the grand stand. The estimation in which the two aviators are held may be gauged from the fact that Bombita has dedicated two of his finest bulls to them. On Saturday both flyers were entertained by Admiral Exmouth on his ship. Afterwards Mollieu carried out a 20 minute trip to Torre- molinos, passing over the chateau where Admiral Exmouth was at tea, dropping flowers by way of greeting, and thence back to the aerodrome. 732
Sign up to
Flight Digital Magazine
Flight Print Magazine
Airline Business Magazine
E-newsletters
RSS
Events
