Main Discussion Area > Horn Bows
Trying to make a horn bow...it broke!
Mesophilic:
It is homemade hide glue made from rawhide scraps.
I'm going to order some dried hide glue for the next one, so I can use rhe percentages you suggested.
Here's another angle on the fracture.
bownarra:
You are best using glue you have made yourself. That way you can guarantee the best strength. The very best glues are made by making certain that the temperature never exceeds 60 degs during cooking of the rawhide/sinew etc and it is heated for no more than 8 - 10 hours.
If it gels strongly it is more than likely strong enough.
You can dry your fresh glue by letting it gel in thin layers and cutting into small pieces. Place the pieces in front of a fan in a cool place and it will dry in a day or so.
I know you mentioned the drying crack as the likely cause but even when a core is broken right through a good sinew layer will keep it together. I once had a Turkish bow at full draw for the first time....heard the dreaded 'tick'. I checked the bow all over but couldn't find anything wrong initially. It was only later that I tapped the sinew and found a bit that wasn't stuck. That limb kept acting weak and eventually I gave up on it soaked it in the bath for a few weeks! This revealed that the sinew had delaminated from the core, the core then broke because it was now feeling tension. The point being that even with a core that was broken clean across the back the bow could still be taken to full draw because the sinew layer as a whole was ok. I suspect I got a contaminant on the core somehow that caused the delam. It was a real pain because that bow was basically tillered, perfectly straight and right on desired poundage all I did was open it up and string it.....that will probably never happen again!
sieddy:
Man I can't imagine how frustrating that feels after so much careful work--it's bad enough when a self bow fails!
Oh well back to it- it'll be worth all the pain when you start making the fully functional beauties! 😊
Mesophilic:
--- Quote from: sieddy on January 15, 2020, 01:09:43 pm ---Man I can't imagine how frustrating that feels after so much careful work--it's bad enough when a self bow fails!
Oh well back to it- it'll be worth all the pain when you start making the fully functional beauties! 😊
--- End quote ---
Thanks! Though I'd settle for a "function ugly duckling" right now.
It's kind of like going back to when you made your first selfbow, and you read tons of books, scoured the internet, watched videos, felt in over your head when the wood shavings started falling...but x's 100 ;D
simk:
Hello Mesophilic
How much sinew did you put on it? For me that layer looks quite thin.
I'm also about to do my first hornbow (-attempt), which will most likely also fail 8). Soon its time to bend it in...makes me nightmares already 8)
But one day....one day....
Cheers
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