Do you think 3.5" is too much glue in reflex?

bigcountry · July 04, 2011, 01:52:00 PM

Glueing up a HBO, and my form I made is 3.5" of reflex. Thinking that may be too much. I bent it in as a test run. Nothing splintered. But I figured out of the form, it will be >2"?

Too mucH?

SEMO_HUNTER · July 04, 2011, 01:56:00 PM

Don't know if this will help you much, but my trade bow is a BBO straight profile with 3.5" of glued in reflex. I used 2x4 blocks to raise the tips up to 3.5" and only retained about 1.5" after tillering.

vanillabear? · July 04, 2011, 02:05:00 PM

Diamondback59 · July 04, 2011, 03:03:00 PM

nope not enough haha ull lose half of it when it comes off the form probly some more after also brock

vanillabear? · July 04, 2011, 03:33:00 PM

Mark Smeltzer · July 04, 2011, 04:29:00 PM

Hey Vanillabear,
Not doubting your results at all but I have had the opposite experience.
I now use several thin lams for that reason. I was thinking the more glue lines helped it keep the reflex. I was also thinking that is why glass bows maintain their shape better off the form, I know the glass has a lot to do with that also.
I glue in around 4-6" (depending on the final length of the bow) of reflex and 1/4" deflex. I normally end up with about 1/2" deflex and around 3" reflex.
Just the way I do it.

Mark

vanillabear? · July 04, 2011, 07:17:00 PM

Mark Smeltzer · July 04, 2011, 08:20:00 PM

I see where you're coming from and that is my understanding of how and why the "Perry reflex" works so well.
I also think that you are right in your analogy of the track, it's a way of pre-stressing and storing that stress in the limbs.
Probably more than in the multi-lam limb.
Good points

Mark

bigcountry · July 04, 2011, 10:56:00 PM

Well, it felt like too much, I ended up gluing in 2.5" of reflex. Guess I was chicken it was going to pull a splinter on the belly.

Well see how much it holds tomorrow.

Pat B · July 04, 2011, 11:43:00 PM

3" to 4" s max to me. 2" to 3" is usually what I use. More than 4" has given me more set because of overstressing I believe.
Hickory has some stretch to it so 3.5" with a hickory backing is not like 3.5" with boo backing.

Mark Smeltzer · July 05, 2011, 08:59:00 AM

I agree my 4-6 is allot and can be a real pain to tiller. I only do that on the form that I use multiple lams other wise, like the trade bow this year it was 3" of reflex.
A sinewed Yew bow I'm working on pulled over 6" of reflex into it and it is giving me fits!

Mark