oceed to make thejig (see Fig. 4) for holding them whilst theyare tapered on the vertical spindle. 4 HOW AN AEROPLANE IS BUILTThis jig will consist of a hard piece ofwood about 6 in. longer than the strut, 4 in.wide by f in. thick. The centre of thiswill be carefully squared off, and 1 in. oneside… … Fig. 4. length marked on the jig board. Set strutback J in. from the edge where thelightening begins, and is in. from theedge where the correct end of the strutoccurs. Clamp the strut firmly in thisposition, and then fix another piece of hardwood on the inside of the strut, glueingand screwing it…
Airplanes
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