File:How an aeroplane is built (1918) (14775943162).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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Text Appearing Before Image:
he wingsof an aeroplane, the first thing to do is toconsult the plans showing the generalarrangement of the machine, or some othercompetent authority if this information isnot available on the drawings. Having obtained the drawings on which,we will assume, is the necessary informa-tion, the first thing to do is to ascertainwhere the line of flight traverses the bodyof the machine. In our case, we willassume that the top surface of the longe-rons of the fuselage are parallel to the lineof flight. This being the case, our work is fairlyeasy, because we have a ready-made baseline to work from. But we must not acceptthis without first checking it, in case anydiscrepancies exist. Therefore, the longe-rons must be tested with straight-edges,each about 3 ft. long, placed at intervalson the top of the longerons and sightedthrough. This operation will satisfy us that thefuselage is not twisted, and further, that thetop surface of the longerons is straight andtrue. 208 HOW AN AEROPLANE IS BUILT
Text Appearing After Image:
HOW AN AEROPLANE IS BUILTHaving satisfied ourselves on this point,the next thing to do is to level up accu-rately the top surface of the longerons,both longitudinally and transversely. Thismay mean packing up or lowering the tailof the machine, and then securing it firmlyin this position with weights or any otheravailable or suitable means; further, themachine 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 theu

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