Will Foam?

[heartlandbowyer]

Hey guys just got some foam and have a few question so any wisdom you can send my way will be greatly appreciated.

First will .100 thick foam bend around my forward handle riser? It
Includes a 8.625 rad and 9.625 rad.

Also here is what I'm thinking for my stack.
Back .030 black uls
          .020 carbon
          .100 foam core .002 taper with tip wedge
          .030 core tuff
          .100 foam core .002 taper
Belly .040 black uls

Tolal stack .320 which with wood and glass would usually give me a 40 lb bow.

Thanks,
Cory

[Dmaxshawn]

On a one piece bow I had to subtract 30% for carbon and foam.  But I didn't have all that extra in there.  Carbon is designed to be the outer most layer on the back of the bow.  Why the glass on the back ? Why the glass in the core ? Looks? Your could be loosing performance.  You have a lot of variables going on there unless that's the same way you lay up your other bows minus the carbon and foam.  

When I first started foam I built it the same way as a boo cored bow.  Same everything it added 10-11 pounds. Hard to tell exactly on my junky scale.  

Next I built one with boo and carbon and then foam and carbon.  Just to see the differences between the bows.  

If it were me I'd leave out the core tuff and the back glass.

[heartlandbowyer]

Shawn,
The only carbon I've been been able to get my hands on is the Gordon's unidirectional that Bingham carries. I was a little unsure if I could use it directly on the back if it was sanded both sides. I've also read in other threads that is dinged up easily. I would like to find the cross weave carbon that is sanded on one side and clear on the other side. Not sure what they call it but I've seen guys leave it that way or skin it.

As far as the core tuff it's pretty much an accent, I think it may add a little stability, probably more so on a curve. I am getting pretty good numbers with the Bo tuff in my normal bows. Usually 178 to 185 @ 10 gpp drawn to 28.

This will be my first time messing with the foam  and if it's 30% less stack I need to get ride of something .

Cory

[Dmaxshawn]

I only used one side sanded carbon.  I got foam and carbon from dale and he told me to reduce stack 30%.  And that two other reputable bowyers did the same and they were real close.  

Not sure about two side sanded carbon.  Carbon in he middle is an expensive racing stripe.  That two sided carbon should be ok to finish I would think.  Cut an inch off and spray it with finish to see if it does well.  

I'd at least get rid of the back glass and let the carbon do what it's supposed to.  If it doesn't finish well then skin it.   I had to build about 10 foam and carbon combination Bows to see what would happen.  

You never know till you build it.

[heartlandbowyer]

Thanks I will have to get back ahold of Dale and have him send out some carbon that's sanded only one side. I typically use 6 or 7 lams counting the glass on my normal bows would you recommend reducing that number?
 
Thanks

[Jon in North Idaho]

Talk to Kirk at Big Foot Bows.  (Kirkll)