What Happened?

[kennym]

Is that the Bingham hybrid?

A longer riser with thinner fades would work as would just thinning the fades you have there. They have to bend a little so you don't have a hinge and a breaking point.

the fades for me need to be 1/16" at 1 " from end of riser and a fuzz over 1/8" at 2" from end. Anymore I mark 1 and 2 inches from ends on both sides of riser and measure with the dial calipers. .065" at 1" and .140" at 2" from the ends.

Sent you an email too..

[D.A. Davis]

Yes, Kenny.  I purchased the pattern for the form from Binghams.  The riser block I use is 18".

[D.A. Davis]

Oh, and the bow pattern came from Binghams, as well.

[kennym]

They almost always use .002" PI in their limbs , I'm more of a .003" PI guy...  

[D.A. Davis]

So Kenny, if I wanted to add deflex to my riser/fades, I could take my existing form, and remove material from the area where the riser is pressed into the form.  This, of course, would have to be done carefully, and evenly, across the span of the riser/fades and flow it out toward the limbs some.  I would also have to add material to the top half of the form to ensure even pressure across the span of the bow.

[kennym]

Yep , just maintain the space for air hose and riser...

Did the email work I sent? That may help...

[bamboo]

Originally posted by kennym:
They almost always use .002" PI in their limbs , I'm more of a .003" PI guy...      

^^^^this in addition to finer /less abrupt fade should resolve the issue
---the .003 taper will make it bend further out on the limb [spreading the loads]--think of an abrupt fade as a fulcrum that pryed your glass off tour riser
---you'll get it this time!!good luck!

[kennym]

Yeah, I would be tempted if I were you to build a black glass one without changing the form and like Mike says thin the fades and go with .003 total taper. Changing taper will lighten the bow a little going from .002 to .003 but I don't know how much...

[D.A. Davis]

Yes, I got the email, Kenny.  I had to move it out of my junk folder.  But, it's good now.

That's some good information, Kenny.  Thanks.  That'll help me a lot.

[David Flanrey]

D.A., If you want to try a .003 taper with a power lam built into your stack "superlam".  I can grind you one out if you want some maple.  That would help the bend move out a little past the fades.  In my opinion.

I am in Paragould.  Send me a pm if you want to give it a try.

[D.A. Davis]

Thanks David.  I sent you a PM.