I beam riser ?

Forwardhandle · January 12, 2018, 09:15:00 AM

Hi Fellas Im putting my riser material together for a Kennym bow , Kennym mentioned that I beaming with just wood increases the strength of the riser ,Im assuming that means putting one peace vertical grained & one peace horazontal grain ? Or a combanation of alternating grains ? I just want to make sure Im thinking right ?

Buemaker · January 12, 2018, 09:56:00 AM

Here is a recurve handle blank with Sonokeling Rosewood with an Ibeam of Bubinga and contrasting Birch veneers.

Buemaker · January 12, 2018, 09:59:00 AM

Finished RD bow with Ibeam. I offset the Ibeam to get its full strength in the cut out sight window

Forwardhandle · January 12, 2018, 10:10:00 AM

Verry nice thanks for posting that I appreciate it beautifull !

January 12, 2018, 10:14:00 AM

No 90 degree grains... Keep them all length wise...

Mike Mecredy · January 12, 2018, 11:55:00 AM

Really nice.

Roy from Pa · January 12, 2018, 12:15:00 PM

Bue that is awesome.

kennym · January 12, 2018, 12:39:00 PM

Nice! love the accents in there!!

Forwardhandle · January 12, 2018, 01:21:00 PM

Ok at the risk of sounding dense ,but in then pic above it looks like the outer 2 peaces of wood are flat grained and the center peace is edge grained ? That would put them 90 deg,s grain wise to each other , or em I seeing it wrong ?

Buemaker · January 12, 2018, 02:13:00 PM

You are seeing correct. When glued up like that with strong woods like Rosewood and Bubinga I do not think it matters.
The finished bow have an Ibeam of Lignostone and all pieces are flat grain.

Forwardhandle · January 12, 2018, 02:38:00 PM

Ok thanks got it ! Im going to use Mozanbique & rock maple , I recently used Mozanbique on a all wood bow riser that wood is about as dense of wood as I have ever worked Thanks !

Bvas · January 12, 2018, 02:53:00 PM

As simple as this topic may seem.....it can get confusing quickly to some(myself included

).

Please

someone correct me if I'm wrong.

There are four possible grain orientations from best to worst:
-Vertical Flat
-Vertical Edge
-Horizontal Flat
-Horizontal Edge

Crooked Stic · January 12, 2018, 03:35:00 PM

I would think all edge grain in main part and ibeam will be stronger. no more than quarter sawn is best.

Bvas · January 12, 2018, 03:51:00 PM

Stic, are you speaking when looking at side of bow or back to belly.

I should clarify, I was referencing side view.

Roy from Pa · January 12, 2018, 05:01:00 PM

Heck it's only a gwass bow....

TradBowyer · January 12, 2018, 05:34:00 PM

don't forget when gluing individual strips of wood together they become homogenous so grain orientation becomes less critical. making an I beam riser is the same concept as actionwood. individual pieces glued together as one is stronger than a single block

kennym · January 12, 2018, 05:51:00 PM

QuoteOriginally posted by TradBowyer:
don't forget when gluing individual strips of wood together they become homogenous so grain orientation becomes less critical. making an I beam riser is the same concept as actionwood. individual pieces glued together as one is stronger than a single block

Yes, you could cut the block in 3 pcs and reverse the center one and increase strength a lot!

Forwardhandle · January 12, 2018, 06:32:00 PM

Sounds good Kenny I will do it with both peaces , glad I started the thread I have a much better understanding of the concept now ,thanks fellas, I was thinking it had to do with grain orientation prior to the thread !

kennym · January 12, 2018, 06:41:00 PM

If you can, make the grain like Bue's outer pcs. Won't hurt if you have a choice, plus shows grain better on sides of riser.

Buemaker · January 12, 2018, 06:44:00 PM

It's only rock'n roll and I like it like it, yes I do.