Primitive Archer

Main Discussion Area => English Warbow => Topic started by: Mafort on June 21, 2019, 09:58:43 am

Title: Ipe hickory and bamboo trilam questions.
Post by: Mafort on June 21, 2019, 09:58:43 am

So I have found 2 ipe boards here in Kentucky that are straight grained and the first thing that came to mind is the English longbow. I’m wanting to get Atleast 70-75 at 28”. I’m sure it’ll be more than that at 32” but that’s my hunting length is 28”. Anyways what are some measurements to follow that will assist me in getting my desired draw weight? The backings are 1/8” thick by 2” wide and the Ipe is an 1.5” thick by 2” wide by 72” long. Any help would be appreciated. The other one I’m wanting at like 100lbs of draw but that’s a whole different beast to master and I want to make sure I get the lighter one done correctly first

Title: Re: Ipe hickory and bamboo trilam questions.
Post by: Pat B on June 21, 2019, 10:18:41 am

With the ipe being 1.5" thick you could easily build a 100# backed bow with a boo or hickory backing and not worry about it being a tri-lam. I'd make it about 1.25" wide at the handle down to .5" at the tips. Keep it 72" long.

Title: Re: Ipe hickory and bamboo trilam questions.
Post by: Mafort on June 22, 2019, 06:52:50 am

I got mixed up. It’s only 3/4” thick.

Title: Re: Ipe hickory and bamboo trilam questions.
Post by: Pat B on June 22, 2019, 09:40:52 am

Even at 3/4" you could build the bow you want with just a backing.

Title: Re: Ipe hickory and bamboo trilam questions.
Post by: Mikkolaht on June 23, 2019, 07:16:13 am

You can make a 200 pounder with that slice of Ipe if you want to.

(https://i.imgur.com/NKMcE8B.jpg)
This one was s 200lbs at 32inches.

I failed with the tiller on this one. And the bamboo back got a small splinter. However the bow remained straight when unstrung, which goes to prove how great Ipe is.
Laminates were: Bamboo, Maple, Ipe