Thanks for the info Kenny.  Now to see what happes with the elm stacks

Shawn

Bob,
I figured the same,the maple checked stiffer per thickness on my bench test,but showed no difference in the bow. As a side note,the maple bow shows about 1/4" set after shooting in,the aboo bow still fits the form....

Tom, I may need to get that book to read this winter......

Shawn, red elm is my next victim!!

So do you think the maple will lose performance overtime due to its set taking properties?

IMO , no , because it hasn't changed since first stringing it and leaving for a few hours....

Good stuff Kenny!  Not what I was expecting either.

Kenny, was it set after shooting or springback after taking it off the form?  

I've noticed that when I'm laminating maple and hickory for anything they always spring back off the form a bit more than the other stuff I'm using.  Those woods being stiffer per thickness will resist taking the new shape more than the more flexible woods.

Tommy6 I have the Harrison book. I like the science behind what he says. I noticed in his book that he also said the boo was good at 62" and longer as well. He said any bow 62" and longer he uses boo and below that it he uses Maple, action wood or osage I think. He also said a two lam bow was 10% faster. Maybe because the epoxy is heavy and the more lams the more glue and therefore more weight. Where is the part about gluing the riser to the belly? I was thinking about trying that but don't remember reading about that in the book.

I dont have the book with me but I believe that he mentions it a few times, check :
Chapter Nine, Step # 4 — Laying Up The Limb Lamination Bundles.
I believe its in there.
I think you are right about the xs weight decreasing performance, multiple lams would do that, also the main reason for trapezoidal sides.
So many variables it can make your head spin!

Would be interesting to see down the road if the bamboo will keep the shape and compared to the maple. Then later chrono them again.
ive heard Boo is know to have the weakness of setting.
Tommy

Jeremy,I didn't check the springback til I laid the bows on top of each other,it was after shooting. So,I really don't know if it was springback.....

Interesting. I always heard that Maple core would be faster and Boo would be a smoother draw. Great test Kenny. Thanks

You're welcome Steve.

But as was pointed out by a respected bowyer last weekend,the next maple bow may be way diff,but the a-boo will be very close. A reason why customs have a-boo in lots of em. The #age will be very similar from bow to bow.

When you build on a schedule,you gotta hit weight!

Started the last 2 test bows today,think I'll finish them before I go to the shop with the hooter shooter.

These are walnut core and red elm core. Plan to glue one tomorrow AM and the other maybe Sunday.

Did one riser today and will do the other after the 1st glue up.

Gotta get my camera hooked to this dang computer,for black glass, these are SHARP!!     :cool:

OK, gettin close! Gotta build one more due to a brain fart in the shop. Went to trim the ends of the walnut core bow,cut the 2nd end on the nock line instead of cutoff. It is now a 62" bow,I trimmed it down to 50 # and will chrony it along with the others.

Just a few pics to let y'all know I'm still workin on em!!

wow kenny those look sharp  

Nice. Ehhh... Kenny? Do you have my adress?? Lol

Nice work Kenny! What are you going to do with these once your done with the test? Can I start the opening bid? Or at least put my name on the list.

Whens the big hooter shooter date?  Looking good Kenny.

Shawn

Kenny, those bows really look good, the black glass really sets off the wood in the risers. Great work!!!  Bob

Two more and you will have a six pack Kenny