"oough foom"

Vot iz dat??? 🤣 🤣 🤣
Clues....................

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In rough form ----- us profs work like this :p

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Well I laboured through this and had to google how to work out the area of a segment as I thought your symbol for pi was an M which threw me!, but yep you are right and I have now relearned a lot of the properties of circles and the maths that goes with them. plus I do not have a calculator that gives me cos, sine , tangent and their opposite. Nor do I have a book of tables.

BUT I remembered that I have an engineering workshop data book, dating back to 1947, which has all this stuff, plus tables plus a lot more besides. All to be used well before the days of hand calculators, pooters, Google etc. Slide rules and adding machines would have been all you had then. The Newall Standards of Fit are interesting. The chapter on recipes is fascinating, from belt dressings to fillers for castings. Arthur W Judge is your man, or rather was! I couldn't help but think of some members on here while looking at all the stuff about drilling, etc.
Cheers mate!
Every day really is a school day on here!!
 

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