22 How To Build A 20-Foot Bi-Plane Glider … Fig. 20.-Method of hemming up edge of cloth. under i of an inch and forming a 3 inch hem as illustrated in the upper part of Fig. 20. This 3 inch hem is then doubled back one inch and sewed again so that the result is a two inch hem, composed of two thicknesses of cloth save for one inch back from…
Aviation · Gliders · Aeronautics · Airplanes
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