WHAT WOOD FOR TRI-LAM CORE?

[Easternarcher]

I'm been wondering about the types of wood that make a good core and how to best get a little extra out of my bows.
Am I correct in thinking that a lighter weight core can lighten the limb mass and improve performance? or should I stay with heavier woods like Osage and Ipe?
Anybody got suggestions on the best woods for cores when I only want 50-60lbs drawweight? Osage or Ipe as bellywood. Got some purpleheart-bloodwood and yellowheart(which is abit lighter weight) I guess I can use cherry, but I hate to hide that beautiful wood behind hickory and Osage...

[adb]

You're on the right track... purpleheart, osage, ipe, bloodwood, cherry, bamboo... all make good core lam woods, and I've used 'em all.
I tend to stick with the denser woods for heavy warbow weight tri-lams. My fav combos are: maple(hickory)/purpleheart/osage, maple(hickory)/bloodwood/osage, hickory/osage/ipe, hickory/bamboo/osage. These combos have worked for me up to120#.
If you only want 50#, I wouldn't do a tri-lam anyway IMHO... just back some osage with maple or hickory, and you're good to go.

[Easternarcher]

You're on the right track... purpleheart, osage, bloodwood, cherry, bamboo... all make good core lam woods, and I've used 'em all.
I tend to stick with the denser woods for heavy warbow weight tri-lams. My fav combos are: maple(hickory)/purpleheart/osage, maple(hickory)/bloodwood/osage, hickory/osage/ipe, hickory/bamboo/osage. These combos have worked for me up to120#.
If you only want 50#, I wouldn't do a tri-lam anyway IMHO... just back some osage with maple or hickory, and you're good to go.

As far as using maple for backing, should it be quarter sawn?  and about 3/16ths thick? or more?

thanks ADB

[adb]

Yes, 1/4 sawn maple is good. Of course, the straigther the grain, the better. Depending on draw weight, yes, I use 3/16" or 1/4". Same for hickory.