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Show PICKED MATERIAL USED IN THE AIROPIjANES No part of an airoplane is subject sub-ject to greater strain than the landing land-ing gear when the machine is brot to earth. Because of this each piece of the wooden material is made from carefully selected spruce, reinforced reinforc-ed by binding. The metal joints are further strengthened by rubber windings which also increase resiliency. re-siliency. All parts are cut to air-steam air-steam shape to decrease resistance. In the construction of one airoplane airo-plane ot the more simple type 244 feet of spruce, 58 feet of pine, 31 feet of ash, and 1 1-2 feet of hickory hick-ory are used. The list of material, exclusive of the engine, also includes includ-es 3,262 feet of wire, 7S8 forgings, 921 steel stampings, 57 square feet of veneer, 11 gallons of varnish, 59 gallons of dope, 201 square yards of linen, 34 feet of rubber and 65 lbs. of aluminum. Over 4,000 nails are used, 3,377" Bcrews, and 276 turn-buckles. turn-buckles. . |