



 
Hi Paul, What you have is a truncated cone. You didn't give units but I expect they are millimetres. Look at Penny's response to Russell's question. Using your dimensions and the notation from Penny's response I get x = 500 mm. This then gives AD = 1453.44 mm and AE = 559.02 mm. The arc FD in the second diagram has length 1300 π mm which gives me the angle measure of t = 161 degrees. You should check my arithmetic. Harley  


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