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Aviation History
1922
1922 - 0022.PDF
JANUARY 12, 1922 The fuselage is also, we understand, built of metal through out, with the exception of the covering, but as it was not One of the best examples of Duralumin construction at the Paris Show : Details of the Wibault wing. exhibited we have not had an opportunity of examining its constructional details. The employment of only a single pair of struts on each side has been made possible by using wing sections of great depth. For the section used, it is claimed that this, which is the result of experiments made by M. Wibault personally, is more efficient than ordinary thin sections, although of the deep, high-lift type. The small amount of external bracing results in a low wing resistance, and the inward slope of the interplane struts in conjunction with the short top plane has the effect of giving equal loading in upper and lower spars, which is not the case where upper and lower bays are equal As regards the wing construction, this is indicated in the accompanying sketch. The somewhat unusual view is the result of the fact that the wing from which the sketch was made was standing on its leading edge. The wing spars are built up of Duralumin sheet, flanged over as shown. It will be noticed that the flanges of the lightening holes are produced by simply bending at right angles along straight lines, and that where a radius occurs the flange is made up of a separate piece. This form of construction has the ad vantage that the flanges can be made without incurring the expense of costly dies for stamping out the flanges. The spar flanges themselves are flat strips of Duralumin riveted to the flanged-over edges of the webs. The number of rivets required is not excessive, and altogether this spar construc tion is much more of a commercial proposition than the majority of those exhibited. For greater compressive strength, it would probably have been an advantage to have the spar flanges rolled to form a corrugation along their ridge, but even with the flat flanges the spars have withstood a sand load equal, we are informed, to a factor of safety 01 75, without showing any permanent deflection. The ribs are entirely tubular, the flanges consisting ot tubes', bent to the desired curvature, and the webs formed by a series of N-trusses, attached to the flanges by clips and rivets in the manner shown. The main characteristics of the " Wib. 2, B.N.2, areas follows : Length o.a., 41 ft. 10 ins ; span, 55 ft. 6 ins. ; height, 16 ft. 5 ins. ; wing area, 1,035 sq. ft. ; engine, 600 h.p. Renault; weight empty, but with cooling water, 4 620 lbs. , useful load, 3,100 lbs. ; fuel for 4 hours at 6,500 ft. ; total loaded weight, 9,450 lbs. ; speed at 6,500 ft., 125 ™P-h- *' wing loading, 9.13 lbs./sq. ft. ; power loading, rj.8 lbs./h.p. S H M M THE LONDON-CONTINENTAL SERVICES FLIGHTS BETWEEN JANUARY 1 AND JANUARY 7, INCLUSIVE RouteJ I "3 6 o do a o No. of flights carrying 5 I-§1 — s 0 g a ° u a « „ II « > < Fastest time made by Type and (in brackets) Number of each type flying Croydon-Paris Pari8-Croydon Totals for week * Not including 7 11 18 9 24 33 3 3 6 7 11 18 7 3 10. h. m. 2 6 4 0 Breguet F-ADAV (ih. 50m.) D.H. 18 G-EAWO (3h- 15m.) B. (1), D.H. 4 (0. D.H. 18 (1), H.P. (1). Sp. (1), V. (1). B. (1), D.H. 4 (1). D.H. 18 (r), G.(2),H.P.(2).Sp. (2),V.(I). ' private " flights. f Including certain journeys when stops were made en route. X Including certain diverted journeys. Av. = Avro. B. •» Breguet. Br. = Bristol. Bt. = B.A.T. D.H.4 -» De Havilland 4, D.H.9 (etc). F = Fokker. Fa. = Farman F.50. G. = Goliath Far man. H.P. = Handley Page. M. — Martinsyde. N. — Nienport. F. = Poteas. R. = Rumpler. Sa. «* Saimson. Se. — S.E.5. Sp. = Spad. V. = Vickers Vimy. W. - Westland. The following is a list of firms running services between London and Paris, Brussels, «tc, etc.:—Co. des Grandes Expresses Aeriennes \ Handley Page Transport, Ltd.; Instone Air Line; Koninklijkie Luchtvaart Maatecnappij; MeMageries Aeriennes; Syndicat National pour l'Etude des Transports Aeriens; Co. Transaerienne. 13 H Air Mail Stamp Issues HITHERTO the stamps issued by the French Government for use in connection with air mail services in certain of their colonies have been " provisionals." Commencing with the new year, however, it is stated that a special set of three stamps-—75 c. blue, 1 fr. red and 2 fr. violet—is to be issued for use in French air mail service in Morocco. They will have an appropriate design, showing an aeroplane flying over Casablanca. Another air mail stamp has just been issued by the New foundland Post Office, two previous issues having made their m m appearance on the occasion of the Hawker and Alcock Trans atlantic flights in 1919. This new stamp has been brought into use in connection with the experimental service between St. John's and Halifax, N.S., and consists of the 35 c. Cabot (1897), which has been Overprinted " Air Mail to Halifax, N.S., 1921 " in three lines. Some 14,000 of these stamps have been issued, and it is said that about 5,000 have been actually used on the service. In connection with the above service it may be of interest to note that the pilot is, we believe, F. S. Cotton, who flew a D.H. 14 in the 1920 Aerial Derby. 22
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