Primitive Archer

Main Discussion Area => Bows => Topic started by: shaneusername on January 03, 2011, 10:51:59 pm

Title: cumura
Post by: shaneusername on January 03, 2011, 10:51:59 pm

Anyone have much experience with cumura?  Have some on hand and heard it would work with a bamboo back but haven't read much about it.  Thoughts?  Coach

Title: Re: cumura
Post by: Parnell on January 03, 2011, 11:10:57 pm

No, but I saw on the web it's specific gravity is about .9

If backed with bamboo or hickory it would probably be good, I'd figure.

Title: Re: cumura
Post by: Marc St Louis on January 04, 2011, 12:06:16 am

Cumaru is a dense wood but a bit low in elasticity.  The one bow I made with it failed suddenly in compression,  it just quietly folded in on itself as I reached a 28" draw.  The bow was a Bamboo backed RD bow 62" long.  It might have survived if I had made it a bit longer

Title: Re: cumura
Post by: medicinewheel on January 04, 2011, 05:03:42 am

Saw nice pieces of Cumaru at the wood store, but all I could find out about it was "compression problems".

Title: Re: cumura
Post by: shaneusername on January 04, 2011, 11:00:27 am

Thanks everyone--Thats what I needed to know--Coach