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Author Topic: Help with BBI dimensions  (Read 3759 times)

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Offline Scott E

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Help with BBI dimensions
« on: March 09, 2011, 05:06:50 pm »
Hi guys, I'm getting back into the saddle after a two year break, and its good to be back.  Just finished the BBH is started for my brother two years ago. Now I'm going to build a bamboo backed ipe flat bow, 62"-64" ntn, 50# @ 27", I usually make a stiff handle area. I never used ipe, so I am uncertain of the required dimensions and characteristics of the wood. I have TB3, Smooth On and Urac 185, would any of these work?  Any information would be greatly appreciated. 
Thanks, Scott
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Offline Elktracker

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  • Josh
Re: Help with BBI dimensions
« Reply #1 on: March 09, 2011, 05:16:47 pm »
John Strunk just helped me glue up a BBI and its 66 ttt used Urac 185, stiff handle 1 1/8 at the fades tapering to 3/8 at the tips. Thickness of the ipe after rought out with the bandsaw is 1/2" at the fade to around 3/8 at the tips. This thing is still very stiff (not floor tillered) and could easily make a heavy bow from it but I will be shooting for 60#.
« Last Edit: March 09, 2011, 05:20:07 pm by Elktracker »
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my friends think my shops a mess, my wife thinks I have too much bow wood, my neighbors think im redneck white trash and they may all be right on the money!!

Josh Vance  Netarts OR. (Tillamook)

Offline Pat B

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Re: Help with BBI dimensions
« Reply #2 on: March 09, 2011, 06:01:04 pm »
Ipe needs to be narrow and boo can also. I'd go between 1" to 1 1/4" at the fades to 3/8" or less at the tips. You should have no problems getting a 50#@27" bow with this combo. If you decide to go on the wider side and you find the belly getting thin start remove wood from the sides instead of the belly.
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Make the most of all that comes and the least of all that goes!    Pat Brennan  Brevard, NC

Offline NTD

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Re: Help with BBI dimensions
« Reply #3 on: March 09, 2011, 06:13:05 pm »
If you intend to use a power lamination between the boo and ipe you can go 3/8" thick through the middle and taper to 1/4" to the tips. 
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Nate Danforth

Offline Scott E

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Re: Help with BBI dimensions
« Reply #4 on: March 09, 2011, 06:35:23 pm »
Thanks Elktracker and Pat B, those dimensions sound like a plan, I will keep the width around 1"-1 1/8" . Thanks NTD, I am not planning on using a power lamination on this bow, but maybe on the next. 
I just received my ipe board, it is quarter sawn, fairly straight grained with a few small swirls (knots?) that go from front to back. Would these be a problem even with a bamboo backing? I had to order it from a company that sells it for decking, so I could not hand pick the board.
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Offline Scott E

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Re: Help with BBI dimensions
« Reply #5 on: March 12, 2011, 11:49:45 pm »
Oh boy, I glued up the bow today with Urac 185. The glue is three years old, and just I found out it has a shelf life.
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Offline Scott E

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Re: Help with BBI dimensions
« Reply #6 on: March 12, 2011, 11:58:42 pm »
It wasnt in the fridge, it was in a cool basement.
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Offline Elktracker

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Re: Help with BBI dimensions
« Reply #7 on: March 13, 2011, 05:00:01 am »
Let us know how it works out, I will cross my fingers for you ;) I would think you would know if it was going to fail for the most part by the time its shot in ???
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my friends think my shops a mess, my wife thinks I have too much bow wood, my neighbors think im redneck white trash and they may all be right on the money!!

Josh Vance  Netarts OR. (Tillamook)

Offline Scott E

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Re: Help with BBI dimensions
« Reply #8 on: March 16, 2011, 11:57:14 pm »
Well, I have good news and bad news. The good news is the Urac 185 worked fine. The bad news is I missed my target weight by way too much. I messed up and had to remove too much belly wood to catch up to my mistake. Its a bummer, it was my first R/D bow, it looks nice so I will finish it and hang it on the wall. Oh well, live and learn. Back to the drawing board.
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Offline Dvshunter

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Re: Help with BBI dimensions
« Reply #9 on: March 17, 2011, 02:12:01 am »
Don't hang it, give it to someone who will shoot it. Kids and some women love those light weight bow. I am glad to har that your urac worked cuz I've got some here that is a bit on the old side of life. Nothin like three years, mine is just a yeasr tops.
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"There is a natural mystic blowing through the air; if you listen carefully now you will hear." Robert Nesta Marley

Offline Elktracker

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Re: Help with BBI dimensions
« Reply #10 on: March 17, 2011, 03:33:49 am »
Got any pics ;D
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my friends think my shops a mess, my wife thinks I have too much bow wood, my neighbors think im redneck white trash and they may all be right on the money!!

Josh Vance  Netarts OR. (Tillamook)

Offline Scott E

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Re: Help with BBI dimensions
« Reply #11 on: March 21, 2011, 01:54:14 am »
Elktracker, I finally put a finish on the bow. The tiller is not great. When cutting the belly taper I went too deep at the fades and wasted too much wood catching up to my mistake. I got to 30# and said good enough, any more tillering and there won't be any belly wood left. I got another bow glued up today with a hickory backing and not 3 year old Urac  ;D
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Offline Elktracker

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Re: Help with BBI dimensions
« Reply #12 on: March 22, 2011, 01:42:48 pm »
Thats looks good ;)

Josh
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my friends think my shops a mess, my wife thinks I have too much bow wood, my neighbors think im redneck white trash and they may all be right on the money!!

Josh Vance  Netarts OR. (Tillamook)

Offline Scott E

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Re: Help with BBI dimensions
« Reply #13 on: March 23, 2011, 08:01:14 pm »
Thanks
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