Just how accurate is the excel spreadsheet thats on tradegang for calculating the total stack adjustments ( to clone a bow but change the poundage )? I also thought about just doing a standard ratio equation but the numbers seem just to high. Thoughts?
I've used the Stack Calculator a few times and it has always been correct.
seems to work good for me.
Works great for me too. I build a Prototype shape with a single 1/4" or thinner pine lam, and finish it out just enough to a decent string on it, and a draw weight taken at 28". Usually the prototype costs me about $40 (two strips of the cheapest fiberglass, some epoxy, and a slice of clear pine).
That gives me everything I need to calculate the correct stack thicknesses for various weights of bows of that shape using pretty woods.
Awsome. Thanks
It works in a limited way..
For instance.. If you are changing your stack of core lams only, yes its fine. If you are comparing a stack and stepping up or down in glass thickness, the changes are more dramatic than it will predict.! YMMV