length to about9 inches of the spruce strut at each end.This being cast, it must be carefullycleaned up, and then it is ready for the156 HOW AN AEROPLANE IS BUILTsheet steel blank, which is to form the strutsocket, to be bent onto it and round it. Before cutting up sheet steel, it is as wellto get… … Fig. 28. the actual blanks. It may be as well topoint out, however, that the outer extremi-ties of the socket should be left quite full,and more or less shapeless, as in actualpractice it is found to be safer to finish offthe final shaping after the welding is com-plete,.in case of any twist or…
Airplanes
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