Author Topic: BBH and Humidity  (Read 350 times)

Offline NewTradArcher

  • Trad Bowhunter
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BBH and Humidity
« on: August 29, 2012, 04:25:00 PM »
Hi All,
I have been hanging out and reading here for a while now. I'm pretty green as far as bow building goes. With help from Dean Torges' video, I have built 3 BBH bows with no real problem so I decided to build a couple of Bamboo-Backed Hickory bow for my kids.  The first bow is 62" NTN and 41# @ 28". I shot some arow through it yesterday and it looked and felt real good. Today, day three, I started the finish work using alcohol base dye from Tandy and sealed with Deft spray. I put the new string on and immediately noticed the lower limb had a severe bend problem. So, I took the string off and with no effort, I was able to bend the limb back into place as if it were wet wood and it stayed in place. The humidity is bad here so I've always dried my wood and bamboo before even attempting a glue up. I use Urac and have never had any problems with it.
Is it possible I took took too long to get the sealer on concidering it is day 3 of the build?
Has anyone experienced this problem? Can I dry the bow in my drying box and if so, what temp would you recommend so to not affect the glue joints? Any suggestions appreciated. NTA.
Learn something new each day.

Offline Millhimes

  • Trad Bowhunter
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  • Posts: 113
Re: BBH and Humidity
« Reply #1 on: August 29, 2012, 07:00:00 PM »
NewTradArcher  I had the same problem with a hbh.My shop is also humid and hickory soaks it up quick,even when sealed.Once it turns to mush,its my experence it won't come back.

Offline NewTradArcher

  • Trad Bowhunter
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  • Posts: 2
Re: BBH and Humidity
« Reply #2 on: August 29, 2012, 10:41:00 PM »
I will try the drying box for a few days to try and salvage it. I didn't think it would suck that much moisture that quickly. Other than Hickory, are there better choices of wood that have similar working qualities for Bamboo backed bows? Osage is very hard to find and expensive even in slat dimensions in Canada. I wonder if Ipe would work since it has an oily quality? What is the best sealer to use with BBH bows to lock out moisture?
Learn something new each day.

Offline Millhimes

  • Trad Bowhunter
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  • Posts: 113
Re: BBH and Humidity
« Reply #3 on: August 30, 2012, 05:23:00 PM »
Ipe makes a perfect wood for bamboo back.Much better than hickory imho.Hickory takes more set than ipe.I never had a problem glueing it up with urac 185 but i here they quit making it.I shoot it alot once i get the tiller looking good as i find it takes alot to get it to settle in.I have had hindges develope after 2-3 hundred shots.There is alot of info on here for bbi's. For finish i like spar varnish.Its about as tough as u can get.

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