FlightGlobal.com
Home
Premium
Archive
Video
Images
Forum
Atlas
Blogs
Jobs
Shop
RSS
Email Newsletters
You are in:
Home
Aviation History
1914
1914 - 1134.PDF
1/ycHfj NOVEMBER 20, 1914. IXe Roved &ero Cla of the Uixited Kii\gdo. OFFICIAL NOTICES TO MEMBERS BE SPECIAL COMMITTEE MEETING. A SPECIAL MEETING of The Committee was held here on the 17th inst., when there were present:—Prof. A. K. Huntington, in the Chair, Mr. Griffith Brewer, Mr. Ernest C. Bucknall, Mr. J. T. C. Moore-Brabazon, Mr. C. F. Pollock, and the Assistant Secretary. Death of The Right HOD, Earl Roberts,—On the motion of the Chairman the following Resolution was unanimously passed:— " The Committee of the Royal Aero Club desires to place on record its deep regret at the death of Field-Marshal The Right Hon. Earl Roberts, who had been an Honorary Member of the Club since 1902, a Member of Council since 1906, and a Vice-President since 1910. The Committee further desires to tender its respectful sympathy to Lady Roberts and her family." Election of Members,—The following New Members were elected :— Flight Lieut. John William Kidston Allsop, R.N.A.S. Percy Easton Cornish. Lord Edward A. Grosvenor. Lieut. Arnold John Miley, R.N. John Morrissey. Oliver Wolcott Thomas. Aviators' Certificates.—The granting of the following Aviators' Certificates was confirmed :— 955 Flight Sub-Lieut. Allan Knighton Robertson, R.N.A.S. (Short Biplane, Royal Naval Flying School, Eastchurch). Nov. 5th, 1914. 956 Flight Lieut. John William Kidston Allsop, R.N.A.S. (Short Biplane, Royal Naval Flying* School, Eastchutch). Nov. 5th, 1914. 957 Lionel Franklin Beynon (Wright Biplane, Beatty School, Hendon). Nov. 5th, 1914. 958 William Harry Ellison, R.N. (Bristol Biplane, Royal Naval Air Station, Hendon). Nov. 6th, 1914. 959 Flight Sub-Lieut. Aylmer FiUwarine Bettington, R.N.A.S. (Maurice Farman Biplane, Central Flying School, Upavon). Nov. 6th, 1914. 960 Julian Pauncefote Inglefield (Maurice Farman Biplane, Military School, Brooklands). Nov. 7th, 1914. 961 Flight Sub-Lieut. John Martin d'Arcy Levy, R.N.A.S. (Maurice Farman Biplane, Central Flying School, Upavon). Sept, 23rd, 1914. 962 Flight Sub-Lieut. Bertrand Lawrence Huskisson, R.N.A.S. (E.A.C. Biplane, Eastbourne School, Eastbourne). Oct. 28th, 1914. 963 Sergt. William Sharpe, R.F.C. (Maurice Farman Biplane, Royal Flying Corps, Netheravon). Nov. 6th, 1914. 964 John Harold Rose (Hall Biplane, Hall School, Hendon). Nov. 7th, 1914. 965 Jesse Albert Easter (Grahame-White Biplane, Grahame-White School, Hendon). Nov. 7th, 1914. 966 Lieut. Eustace Osborne Grenfell, D.C.L.I. (Maurice Farman Biplane, Central Flying School, Upavon). Nov. 9th, 1914. 967 Robert William Alexander Ivermee (Caudron Biplane, British Caudron School, Hendon). Nov. 10th, 1914. The following Aviators' Certificates were granted :— 968 1st Class Air Mechanic James Douglas Clarke (Avro Biplane, Central Flying School, Upavon). Oct. 28th, 1914. 969 Commander R. M. Groves, R.N. (Maurice Farman Biplane and Bristol Biplane, Royal Naval Air Station, Hendon). Nov. 15th, 1914. American Certificate.— 312 Lieut. Douglas B. Netnerwood, U.S. Army (Curtiss Biplane, North Island, San Diego, Cal.). Aug. 17th, 1914. The Secretary of the Club. Mr. Harold E. Perrin, the Secretary of the Club, who joined the Royal Naval Volunteer Reserve as a Lieutenant in September last for duty in connection with the Royal Naval Air Service, has now been promoted to Lieutenant-Commander. New Members. Members are reminded that according to the Rules, the Annual Subscription of any New Member they may propose, who is elected between November 1st and December 31st of this year, will cover the period up to December 31st, 1915. 166, Piccadilly, W. B. STEVENSON, Assistant Secretary. AEROFOILS ARRANGED IN TANDEM. THE RESULTS OF A SERIES OF EXPERIMENTS MADE AT EAST LONDON COLLEGE. THE extent to which " interference " is present when aerofoils are placed in such a position that the wash or wake from one aerofoil exerts a disturbing influence upon the air through which the other is moving, has been the frequent subject of experiment because of its importance in connection with the stability of aeroplanes. The mutual interference of superposed surfaces, the effect of the wake from the airscrew and the wash from the main supporting surfaces over the controlling organs, or vice versa, afford typical examples of wake effects, which may be conveniently studied by determining the distribution of pressure over the surfaces. This method of investiga tion was employed in the series of wind tunnel experi ments, the results of which are given herewith, that were made by Mr. Stewart, B.Sc, and Mr. P. Schar, B.A., under the direction of Dr. A. P. Thurston, of East London College, to whom we are indebted for our information. The arrangement of the aerofoils chosen was that em ployed on the " canard" type of aeroplane, as at the time the experiments were commenced, the form of machine which now predominates had not become so common. The main supporting surface had a span of n ins., a chord of i ins., and a maximum camber of x\ in., while the corresponding dimensions of the elevator or rider aerofoil were 8| ins., 1 in., and T\- in. In both cases the maximum camber occurred at a point distant one-third of the chord from the leading edges. Throughout the experiments, the main surface was set at an angle of 7 ', but the elevator, which was mounted in the course of the investigation in a number of positions relative to the main aerofoil, and of which only five are shown in the diagram in Fig. 2, was capable of being rotated, and the pressure distribution over the surfaces of both the rider and the main aerofoil was ascertained at each position for angular movements of from - 300 to 4- 400 of the rider. Fig. 1 shows typical diagrams of pressure distribution over the upper and lower surfaces of the main aerofoil with the rider inclined at angles of + 400, + 20°, 0° and - 200 for the five selected positions of the rider, 1, 3, 6, 7 and 10 (see upper right-hand diagram in Fig. 2). As is to be expected, the maximum amount of interference with the pressure distribution occurs at No. 6, when the rider is in close proximity to the main surface, but the least wake effect is experienced in position No. 10. For convenience of examination, the areas of the diagrams for each angular position of the rider and each "34
Sign up to
Flight Digital Magazine
Flight Print Magazine
Airline Business Magazine
E-newsletters
RSS
Events
