Ferris, Richard. [from old catalog] · New York, T. Nelson and sons · leaf 248
m. Others use coppernails and clinch them over washers on the under side.Both methods are shown in the plans, but the clampsare recommended as giving greater stiffness, an essen-tial feature. At the front edge of the frames the ribs are fas-tened flush, and being 4 feet long and the frame but3 feet… … o 0) -a O c3 248 THE GLIDER, opening may be made wider to accommodate a stouterperson. The posts are then put into place and bolted tothe struts and the spars, as shown, with ^-inch bolts. The entire structure is then to be braced diagonallywith No. 16 piano wire. The greatest care must betaken to…
Aeronautics
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