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Aviation History
1919
1919 - 0471.PDF
- APRH- 10, 1919 S IGHT The" bottom plane is built in two halves, each attached to the ends of two short lengths of spars permanently fitted under the bottom of the fuselage. The front spar attachment is situated between the front and rear chassis struts, while the rear spar attachment coincides with and is part of the rear chassis strut fitting. The bottom plane spar fittings are of the same type as those of the top plane. Fig. 3 shows the bottom front spar fitting in external view. In principle it is the same as that shown in Fig. 1, but the lug has ac commodation for two interplane struts, the struts being arranged in this machine in the form oijz. letter N. The struts are elliptical section steel tubes. This same N for- mation'is also found in the lift bracing, which consists of plain stranded cable. In addition to the usual two lift cables there is a third one running from the top of the rear interplane strut to the attachment of the bottom front spar to the fuselage. The obliquity of this third cable assists in relieving the internal drift bracing of some of its load. The landing" cables run from the bases of the interplane struts to a single point at the top rear spar where this meets the top of the fuselage. The fuselage is of the usual girder type, with longerons of rectangular section sohd ash. The struts are vertical in the rear portion of the body, and the bracing here is of solid wire. In the front part, that is from the pilot's seat forward, the body struts are arranged as a series of triangles without any wire bracing. The bottom of the fuselage is flat, but the top is surmounted by a turtle back, and the sides are slightly rounded off aft and more markedly so in front, where they finally merge into the circular shape of the cowl. The sides are rounded off with longitudinal stringers, which are attached direct to the vertical body struts in the- rear portion, while in front, where the curvature is more pronounced, they are secured to light three-ply formers. The SOME CONSTRUCTIONAL DETAILS OF THE GRAHAME-WHITE SPORTING MODEL.—1. The spar box and lug for attachment of interplane strut. 2. The wiring plate and socket for tubular compression strut of internal bracing. 2 is secured to 1 by two horizontal bolts. Fig. 3 is an external view of the attachment to the bottom front spar of the interplane struts.' The controls are shown in Fig. 4, details of which are indicated in Fig. 5. Fig. 6 shows the fuselage clip. Details of the undercarriage are shown in Figs. 7 and 8. 47i
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