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Square 1/2 of span. Divide by rise. Add rise. Divide by 2.
WTF? is that oz speak? Seriously I didn't understand a bit of that. Thanx for the help but now I need a lot more help it seems.
Anybody want the calcs for determining just how many more cc's a rebore will gain? Thats easy too.... let me know if you want it...
Precisely. In fact I just used your figures and used a piece of cable to check it. It is indeed a 15" Rad. In fact to 'prove' the calc I just measured out your figs on a piece of paper and a piece of cord to check it......
The formula....Who gives a shit. Cad will figure it for ya.