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Extreme Reflex sinew backed Juniper Bow

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pierce_schmeichel:
Hey Guys I am trying out an extreme reflexed sinew backed juniper bow. I want to test out the full capabilities of juniper and sinew. I want to see how strong juniper can be in compression and make the limbs as light as possible for faster arrow speeds. I used a greenwood juniper stave that I got from a dense branch to get that substantial reflex into it. I will be sinew backing it either tonight or tomorrow night and then its just going to be a waiting game. This is mostly just an experiment. I do not know if it will crysal under extreme amounts of compression like this. I know the sinew isn't going to give on me and if anything does give it will be the juniper.


Also that stick that I had tied to one of the limbs was because I had a hinge there and I didn't want it to end up snaping on me as I put it into backset. I didn't want to remove material from the rest of the bow just quite yet because I wanted to wait until it fully dried out. Since it wasn't dry yet i didn't really know how it was going to warp and harden in different areas.

Bob Barnes:
Very cool...I hope it works out for you and will be watching your posts.  I have never had much luck with juniper heartwood on the belly.  It is beautiful, but the sapwood seems to be much stronger in compression for me.  Thanks!   :OK

Pat B:
That should be fun to brace.  (A)

superdav95:
Wow.  That’s a lot of reflex.   Should be a cool experiment for sure.  I’ll be watching this one. 

willie:

--- Quote from: pierce_schmeichel on January 30, 2024, 12:53:28 pm --- I want to see how strong juniper can be in compression..... I used a greenwood juniper stave that I got from a dense branch to get that substantial reflex into it. ........This is mostly just an experiment. I do not know if it will crysal under extreme amounts of compression like this.........  Since it wasn't dry yet i didn't really know how it was going to warp and harden in different areas.

--- End quote ---

interesting experiment!

juniper is actually poor in compression compared to most bow woods. in a sinew backed design tho, its strong enough to put much of the bending stress into the sinew back. 

if you force the juniper to dry in extreme reflex, wouldnt this cause more stress on the juniper when drawn?

sinew and juniper seem to "balance" each other well, although you have hit on a way to tip the balance some.

branchwood can be diffucult to work with.  Did the stave come from the top or bottom or side of the branch?

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