File:How an aeroplane is built (1918) (14589651428).jpg

Identifier: Howaeroplanebui00Blak (find matches)
Title: How an aeroplane is built
Year: 1918 (1910s)
Authors: Blakeney, Stepney
Subjects: Airplanes
Publisher: London, "Aeroplane" & general publishing co., ltd
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries

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achine should be supported direct, andbrought level laterally, by putting packing-pieces under the ends of the chassis struts.Dont level up by putting packing underthe tyres—which ought not to be fitted untillater—for a tyre may deflate after the level-ling is done, and so throw all our levelsout. And dont pack up the axle, becausethe lashing of the axle to the chassis strutsmay give a bit and upset our levelling. GETTING TO WORK. Having done this, we can commence tocheck the angles of the top main planes,or wings. For this purpose we shall re-quire a pair of high steps to enable the fore-man erector to place the protractor on theunderside of the front part of the wing,preferably on the line of the bottom sur-face of the front spar; we may then expectto read any angle on the protractor between0 deg. and 6 deg., this being the extremedihedral angle which is likely to be wanted. We will assume that the design of themachine calls for an angle of 3^ deg., but HOW AN AEROPLANE IS BUILT
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211 HOW AN AEROPLANE IS BUILTthe angle of the wings, as erected, is only2 deg. Adjustments must now be made. FUNCTIONS OF BRACING WIRES. Before being able to make these adjust-ments we must consider how to do so. Forthis reason we must study the functions ofthe bracing wires, namely, the lift wires,the landing wires, and the incidence wires.The lift wires start from the fuselage andtake an upward and outward course, beingattached to the underside of the top mainplane by the lift plates. These wires maybe termed the Inner Lift Wires, becausethey are in the inner bay, formed by thecentre plane struts and the inner struts. The Outer Bay Lift Wires are attachedto the bottom of the inner bay struts, andrun upward and outward, being attachedto the lift plate at the junction undersideof the top main plane with the outer struts. The Outer Lift Wires are attached tothe plates at the foot of the outer struts,and these also take an upward and out-ward course, being attached to the under-side of

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