Primitive Archer

Main Discussion Area => Bows => Topic started by: possum on September 25, 2008, 03:40:29 pm

Title: bending bbo
Post by: possum on September 25, 2008, 03:40:29 pm

I have a bamboo backed osage stave I'm beginning to tiller.  It has a good reflex but one limb doesn't match the other toward the tip. About 8-10" from the tip it deflexes slightly.  Is it safe to heat and bend it to match the other limb?  And if it is should I use a heat gun or steam?  It is glued on with TBII.

possum

Title: Re: bending bbo
Post by: longfletch on September 25, 2008, 03:52:17 pm

if i remember correctly, TB glues at around 150 degrees will fail, so i dont think its a good idea
bryan

Title: Re: bending bbo
Post by: adb on September 25, 2008, 05:02:56 pm

I wouldn't try to heat bend a glue-up either, especially TB II. I think TB III might be OK. Do you think you could just tiller around it? Send us a pic if you can. Here's a yew selfbow I just tillered with a big deflex bend in the bottom mid limb. Maybe you can work around it?

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Title: Re: bending bbo
Post by: sailordad on September 25, 2008, 06:53:27 pm

nope  tbIII  will not be ok, it will let loose at 150 degrees also

i know for  fact as i hve done it on purpose to get glued wood apart


                                                                  tim

Title: Re: bending bbo
Post by: adb on September 26, 2008, 02:18:59 am

Thanks, sailor. I thought so, but I wasn't sure. My philosophy... after she's glued, no heat bending.

Title: Re: bending bbo
Post by: deerhunter97370 on September 26, 2008, 03:41:07 am

You can delaminate the boo off the belly, heat bend the belly then glue the boo back on. Joel