lam thickness question

[The Gopher]

i know there is no precise formula for this sort of thing but...i am building straight hill style longbow using all parallel lams. i am looking for a 55@28 bow. since this is my first glass laminated bow i know you guys can give me a better start than if i were to guess. i have 0.04" glass for the front and back and am thinking about using 4 woods lams. what total thickness of the wood lams do you think i need? thanks, Dan.

[onemississipp]

This may help...

 http://www.3riversarchery.com/pdf/LongbowChart.pdf

There is also a thread about this same thing some where..

try a search to Lam thickness, or lam chart

[kennym]

Maybe this will help,the top right is a strait 68" longbow with a .002 taper I think.I would guess .324 wood lams(butt thickness or thickest point) + .080 glass to equal .404   .This is from Binghams catalog.