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Aviation History
1909
1909 - 0615.PDF
OCTOBER 9, 1909. FURTHER DETAILS OF SANTOS DUMONT'S No. 20 SUPPLEMENTING the very full illustrated description which we gave last week of the " Demoiselle," we now reproduce four further sketches which we have made specially, in order to still further elucidate certain minor but important details for the benefit of readers of FLIGHT. These include a front view of the complete machine, side of the aviator's seat. The centrally placed leve which lies behind the back of the pilot operates th> wings as described last week, but it is interesting t< observe that M. Santos Dumont ha a piece of brass tube some two o three inches long sewn on to the bad Front view of the " Demoiselle," showing the main stays for the leading edge of the wings as well as the warping wires passing from the seat. another showing the tail with its universal-joint, a third illustrating special fitments adopted for the tubular struts for the main girder, and the remaining sketch relating to the system of lacing adopted for the trailing edge of the main plane. of his jacket, so that when he is seated in place the tub< slips over the lever in question and enables him to rel) upon a positive action when he leans over to the right oi left. In the same sketch, too, may be observed the position occupied by the two chassis wheels. As regards the tail, this in itself is constructed with t bamboo rim as mentioned last week, but the universal swivel is formed entirely of pieces of tube, in the use o which the inventor is very clever. The intermediate T-piece has one vertical arm that swivels in the brasec View of the complete tail, which is moved bodily upwardsand downwards as well as sideways, about the special swivel-joint shown in greater detail in the inset. In the first of these illustrations two important points are brought out with special prominence. Firstly, the tubular stays which form the chief supports for the leading edge of the main planes, and secondly, the precise manner in which the operating-wires for warping the wings are run through small guide-tubes on either Tubular struts of oval section fit into socketsbrased on to thin metal collars in order to stiffen the main girder-frame. As will be observedabove, these collars are rendered rigid with the main bamboos by means of small clampingplates and screws. sockets which couple up the main bamboos together, and the tail itself swivels upon the horizontal arm of the T-piece. Our sketch also shows the connecting-wires that pass to the hand-lever on the right and the hand-wheel on the left for elevating and for steering respectively, and also denotes the presence of the small helical springs 619 C 2
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