My neighbor is an aircraft structure mechanic/engineer with Westjet up here in Canada. I asked him once why pretty much all of the screws on aircraft skins are the dreaded Phillips X-head types. He said that the Phillips design gives "good" (not the best) driver head contact and offers the most strength since relatively little metal is removed from the head to make them. He told me that Roberson heads are relatively weak in comparison with so much metal missing because of the square design. Just saying what I was told. I know that back in the day, all motorcycle cases were pretty much the dreaded Phillips ..... I say dreaded because unless you used an impact driver, you were pretty much guaranteed to mess them up when trying to take the engine cases apart. You could always tell if there had been engine work done, the Phillips heads were messed up.
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Today's Featured Article - History of the Cockshutt Tractor - by Danny Bowes (Dsl). The son of a very successful Toronto and Brantford, Ontario merchant, and himself quite an entreprenuer, James G. Cockshutt opened a business called the Brantford Plow Works in 1877. In 1882, the business was incorporated to become the Cockshutt Plow Company. Along with quality built equipment, expedious demand and expansion made Cockshutt Plow Works the leader in the tillage tools sector of the farm equipment industry by the 1920's.
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