I was hoping that someone might have a better sense of geometry than I.
The plan is to cut a sheet of steel to form a truncated cone, rather like an Ice Cream Cone with the bottom cut off, then to roll a cone to form the aft part of the exhaust manifold below, but the mathematics are causing me some difficulty.
What is the best method for working out the shape to cut from a sheet. I assume there must be some basic set of calculus to work it out?
If it helps, it seems to need to be 20 inches long, 4 inch dia at the widest end and 1 1/3 at the thin end.
All rather embarrassing. Am I going Senile???
