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Aviation History
1926
1926 - 0346.PDF
MAY 20, THE "FELIX" MODEL MONOPLANE WE give herewith some brief particulars of a successful model constructed by Mr. Van Hattum of the Hague, Holland. In designing the " Felix," as the model is named, the chief aim has been to produce a 'plane of great strength, easy to fly, and with a good performance. Thus, a double-surfaced wing —for which a suitable section giving every satisfaction had been found after much research—was adopted. The " Felix " is of the high-wing, tractor, R.O.G. type, and as the wing 3-ply, the others of aV-iri- 3-ply. The wing is mounted above the spar by steel struts which clip into the inner ribs, and owing to their inclination to bend outwards are thus held firmly in position. The tail plane and rudder are built-up of steel wire as usual. The undercarriage is constructed in such a way that the wheels can never come off or bend out of their position. The struts are strengthened bv spruce, bound to the steel wire. N RI8$,3'PLY£ CCNT^E J, STRENOTH£NED BY 3-ft.Y PlftNtQ A Ciueo TO IT VCflY THiri STTEL. WIHE. THE " FELIX " MODEL MONOPLANE : Details of a successful Dutch model designed by J. Van Hattum. loading is somewhat high (7-5 oz. per sq. ft.) an under- carriage of extra strength has been fitted. The " fuselage " is a light hollow spar, braced both in the vertical and horizontal plane. The wing is easily dismantled. During tests the model proved to fulfil all conditions, being very" strong, and a good flyer, especially in strong winds. The wing construction consists of one spar, § in. by \ in. to take the lifting forces, while torsional strength is obtained by diagonal bracing. The outer and inner ri£s are of ^-in. The motor consists of 8 strands of \ in. rubber when direct drive is employed, or when a gearing is fitted 2 by 6 strands are sufficient to take the model into the air. The main characteristics of the " Felix " are :—span, 3 ft. 4 ins. ; length of spar, 3 ft. 4 ins. ; supporting surface, 1-33 sq. ft. ; total weight, 10 ozs. ; wing loading, 7-5 ozs. per sq. ft. ; average duration, 30 seconds. Further details regarding its construction may be seen in the accompanying drawings. ROYAL AERONAUTICAL SOCIETY Official Notices Wilbur Wright Memorial Lecture.—The title of the Wilbur Wright Memorial Lecture, which is to be delivered by Mr. F. W. Lanchesterj Honorary Fellow, at 6.30 p.m., in the Library at 7, Albemarle Street, on May 27, is " Susrentation in Flight." The gold medal which has been awarded to Mr. Lanchester by the Royal Aero- nautical Society will be presented to him at this meeting by Air Vice-Marshal Sir Sefton Brancker, who will take the Chair. J. LAURENCE PRO CHARD, Hon. Secretary. Society of Model Aeronautical Engineers OWING to the strike, it was impossible to hold the Pilcher Cup and K. & M.A.A. Cup competitions arranged for May 8. These two competitions have, therefore, been postponed until May 29, at 3.30 p.m., at Wimbledon Common. The Model Engineer Cup No. 1 competition for " wing only " models and the Novices' competition will be held at Sudbury on May 22, as previously arranged. Independent Force (R.A.F.) Dinner Club THE eighth annual reunion dinner of the Independent Force (R.A.F.) Dinner Club will be held at the Connaught Rooms, Great Queen Street, Kingsway, on June 11, at 7.45 p.m. Air Chief Marshal Sir H. M. Trenchard, Bart., G.C.B., D.S.O., will preside, and it is hoped that Group-Capt. H.R.H. the Duke of York, K.G., K.T., G.C.V.O., will be able to attend. 300
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