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1
Bows / Re: BBI verses BBO
« Last post by mmattockx on Today at 02:42:43 pm »
Quote from: Mad Max on Today at 09:34:23 am
It has to be scraped for tiller. Bamboo has nodes and some dips also.
BBI means Bamboo and Ipe, mine is a tri lam to keep the Ipe thinner.
If I made them all the time maybe I could get the Ipe thinner.

Yes, I understand those things. With your 1/4" ipe thickness that in nearly half the total stack thickness. That means pretty much the whole compression side of the stack is ipe and it doesn't need to be, you only need the outer half of the compression side at most (which is where my 1/8" thickness came from). If you get your tapers right on the lams then you won't need too much scraping to get it bending nicely, but that is a practice thing, as you mention.

Post pics of the bow as you work on it, I am curious to see how much ipe you need to remove during tillering.


Mark
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Bows / Re: BBI verses BBO
« Last post by Mad Max on Today at 11:56:01 am »
Quote from: Pat B on Today at 11:20:09 am
Mark, have you talked to Roy. This seems to be his expertise.

Yes, I'm building off his form design and he gave me a stack height, I reduce the stack some because of the Ipe.
Same Ipe I gave you, any plan when you are going to build?
It was good to see and talk at the classic  :OK
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Bows / Re: BBI verses BBO
« Last post by Pat B on Today at 11:20:09 am »
Mark, have you talked to Roy. This seems to be his expertise.
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Bows / Re: BBI verses BBO
« Last post by Mad Max on Today at 09:34:23 am »
Quote from: mmattockx on June 01, 2025, 02:24:48 pm
This is based in ignorance of this particular combo in an R/D bow, but I would say your ipe is too thick. Unless you are going to remove a bunch in tillering, in which case it is probably OK. You only need a thin layer of it on the belly to carry the big compression loads, especially with an osage core that is very good in compression as well. If you had a maple core then I would say maybe 3/16" ipe, but the osage doesn't need that much help and a 1/8" belly lam should be enough for the load and would keep the limb weight down for more speed.



Mark

It has to be scraped for tiller. Bamboo has nodes and some dips also.
BBI means Bamboo and Ipe, mine is a tri lam to keep the Ipe thinner.
If I made them all the time maybe I could get the Ipe thinner.

5
Primitive Skills / Re: Life is good
« Last post by bjrogg on Today at 07:52:11 am »
Looks like another great weekend Pappy. Good luck with the Elk Hunt. Great reason to get in shape.

Bjrogg
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Primitive Skills / Re: Life is good
« Last post by chamookman on Today at 05:00:13 am »
Congrats on the Elk Tags ! Way Kewl  (=) Bob.
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Flintknapping / Re: Some of my points
« Last post by bjrogg on June 01, 2025, 09:27:16 pm »
Yes very nice points and interesting information. Thanks for posting them

Bjrogg
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Primitive Skills / Re: Life is good
« Last post by Pappy on June 01, 2025, 07:07:13 pm »
My girls relaxing after a long weekend. Hope yall had a good one also. Life is Good. :)
 Pappy
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Primitive Skills / Re: Life is good
« Last post by Pappy on June 01, 2025, 07:05:40 pm »
Also didn't like the way the handle felt on the hawthorn so I took the large hemp wrap off, reworked the grip and redone with smaller diameter hemp, feels nice now. :) Back strap for supper.
 Pappy
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Primitive Skills / Re: Life is good
« Last post by Pappy on June 01, 2025, 07:02:50 pm »
Made a stand for the new knife, I didn't like the way the hamon lines showed up so decided to etch with mustard, that really brought them out.
 Pappy
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