Primitive Archer

Main Discussion Area => Bows => Topic started by: Lee Lobbestael on March 18, 2012, 04:57:55 pm

Title: BL fretting and how to prevent it
Post by: Lee Lobbestael on March 18, 2012, 04:57:55 pm
I have a bunch of black locust staves I split a year ago from October. I have never used BL before. I tried to make a self bow out of this past fall and it chrysaled somethin aweful! I thought the bow was tillered pretty well and it was a full 70" tip to tip so I'm not sure what happened. My thoughts were that maybe the moisture content was still to high, bow to narrow(1 1/2 pyramid), or because I didn't heat treat the belly. I was thinking of trying again but don't want it to happen again. Any ideas guys?
Title: Re: BL fretting and how to prevent it
Post by: Pat B on March 18, 2012, 06:26:39 pm
Locust is one of the strongest in compression woods in North America but it is brittle. That is why it frets so easily. A fret occurs when one area is working harder than the surounding wood. Dry wood, a flat belly, not over stressing the wood while you build the bow and having limbs that are wide enough(1 1/2" min) and long enough so you don't over stress the wood.
  Check out George's website. He works a lot of locust or at least he used to.  ;)
Title: Re: BL fretting and how to prevent it
Post by: blackhawk on March 18, 2012, 07:04:23 pm
if you cut it in oct. then tried to make a bow a month or two later without properly drying it quickly,then id say your wood was too wet for sure.
Title: Re: BL fretting and how to prevent it
Post by: Buckeye Guy on March 18, 2012, 07:12:37 pm
I have not done a lot of Locust but the ones I did were 1 3/4" for about half the limb length then tapered to the tips
there is some crown on the back and I do a flat belly so the edges look very thin about 1/4 " the limb is about 3/8 " total thickness 
I hope that helps you !
I shoot  50lbs @28"
I was told by many old timers that they had given up on Locust because of it chrysaling ,so you are not the only one to struggle with it!
Biased on what they told me that's why I stayed wider and thinner !
Guy
Title: Re: BL fretting and how to prevent it
Post by: Badger on March 19, 2012, 03:12:47 am
  I have had mixed luck with locust, I think it varies quite a bit in it's properties from tree to tree. I do believe it works better when pretty dry. I don't buy locust anymore because of the chysaling but I really look forward to working on one when someone gives me a stave. Beautiful wood when everthing goes right.
Title: Re: BL fretting and how to prevent it
Post by: hedgeapple on March 19, 2012, 03:34:12 am
  but I really look forward to working on one when someone gives me a stave. Beautiful wood when everthing goes right.

Badger is that a hint?  :)  Are you going to be at the Classis?  I have 2 or 3 BL staves that are 2 years old.  They are not the cleanest, they have some twist and dips.  But, if you're interested I could bring you one.
Dave
Title: Re: BL fretting and how to prevent it
Post by: Lee Lobbestael on March 19, 2012, 09:16:38 am
Thanks guys! Black hawk I let it dry a year split with bark on before I started.
Title: Re: BL fretting and how to prevent it
Post by: Badger on March 19, 2012, 10:40:49 am
  Dave, I sure would not turn you down. I would even give it back to you when I left. No guarantee on the outcome though! When I went to mojam I bought a 1/4 log for $20.00 I think. Took me a few days to
draw knife all the wood and I ended up with one chysal in each limb, shot ok but once chrsaled they are really junk.
Title: Re: BL fretting and how to prevent it
Post by: George Tsoukalas on March 19, 2012, 11:14:22 am
The only locust I've worked is NH locust. I think it is pretty good stuff and I do think there are regional differences. I learned bow making on the stuff. It'll teach you. I like 1 3/4 wide. Double your draw and add at least 20% depending on the stave's condition. Jawge
Title: Re: BL fretting and how to prevent it
Post by: mikekeswick on March 19, 2012, 12:07:59 pm
I agree with what the others have said.
Personally I really rate the stuff and wish I could get more.
One of the fastest bows i've made was from b.locust it's also one of my most strained bows. 61 inches ntn, 6 inches of each limb are re-curved, 8 inch handle/fades and they are mostly 1 7/8ths wide. 20 1/2 inches of working limb and 55lbs @ 27
You must be really careful when tillering to make absolutely sure you have no weak areas and the limbs are evenly matched (just like any bow.... :)) ,locust won't chrysal if you get everything right. I love it because it gives you nowhere to hide unlike some other woods like osage. ;)
Title: Re: BL fretting and how to prevent it
Post by: Jude on March 19, 2012, 01:00:10 pm
I'm curious how those of you who use it alot store BL.  When I tried it, I left the bark on and split out the staves.  Can you remove the sapwood green, like osage, or is that not advisable?  I'm planning to try reducing some to near finished dimensions green, then clamping them to a form to dry, like I do with whitewoods.  Will that work as well?

Julian
Title: Re: BL fretting and how to prevent it
Post by: George Tsoukalas on March 19, 2012, 02:24:54 pm
Yes, you can remove bark and sapwood. Seal the back. I never do it. Too lazy. :) Jawge
Title: Re: BL fretting and how to prevent it
Post by: hedgeapple on March 21, 2012, 02:00:59 am
Badger, that's a very generous offer.  I will bring a seasoned BL stave to the Classic for you.  I've been wanting to cut another locust or 2 on the farm.  I will do my level best to make that happen, so I bring another stave to take home and season.  :)