Back in 1956 you wouldn't have a lot of the garbage fasteners like you have now. For specialty fasteners, the newer stuff might be better but even in the 50's they could make special alloys with 260,000 psi tensile strength. I know that because that's what they needed to make the landing gear for the Avro Arrow. Space was limited so they needed a super strong alloy to hold the weight and also fit into the tight space in the wing. Avro were also pioneers in the use of titanium in the 50's. The Iroquois engine was the most powerful engine in the world and also the first jet engine designed to be made from titanium from the outset. It was 5000 lbs lighter than a P&W J75 and had 40% more thrust.
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Today's Featured Article - The Nuts and Bolts of Fasteners - Part 2 - by Curtis Von Fange. In our previous article we discussed capscrews, bolts, and nuts along with their relative hardness and thread sizes. In this segment we will finish up on our fasteners and then work with ways to keep them from loosening up in the field. Capscrews, bolts and nuts are not the only means of holding two parts together. When dealing with thinner metals like sheet tin, a long bolt and
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