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Aviation History
1918
1918 - 0828.PDF
CHT Fig. 2.—Sketch showing construction of body formerand attachment of longtron. JULY 25, 1918. dynamically it does not look as neat and efficient as the"Albatros way of doing the same thing by frankly letting the bottom plane abut directly on the curved sides of the bodyFig. 4 is a perspective view of the Pfalz body, and serves in conjunction with Fig. I to explain the general arrange-ment of formers and longerons. Some of the formers, it will be noticed, are sloped in relation to the others. Thus, forinstance, the former in the neighbourhood of the pilot's seat slopes back so as to bring it approximately into linewith the rear chassis struts, while rigidity is lent to the front portion of the body by sloping one of the formers carryingthe engine bearers until its top meets the top of the next former. In this point also the formers are joined to thefront struts carrying the top plane, while one of them serves, at the point "of attachment of the bottom corner longeron, totransmit the load from the front chassis struts. One of the difficulties of monocoque body construction hasalways been that you cannot bend three-ply sheet over a double curvature. That is to say, in sheet form the three-ply will bend willingly to the curvature of the converging sides of a flat-sided body ; but as soon as the sides are nolonger flat but have a curvature, however slight, three-ply in sheet form cannot be employed. In the Albatros this diffi-culty is overcome by using small sheets, covering only one bay, and forming in reality, although it is not noticeable,a series of straight bays. In the Pfalz a different method has been employed. The body covering consists of two 4 |j Fig. 3.—The wing roots are formed, on the Pfalz, integrally with the body. On the left is shown the construction of these roots, and on the right the final shape. The firsting this showing method of covering with ply-wood the body of the Pfalz.
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