Main Discussion Area > Bows
how to fill checks in yew
bownarra:
As you have seen dry heat and yew aren't really best friends....
You can heat epoxy to thin it but still best using a very thin wicking CA.
One thing however is that yew doesn't like being in wide thin bows. your layout isn't ideal for it. I would go narrow and thick. Certainly no wider than 1 1/4".
Del the cat:
--- Quote from: bownarra on August 15, 2022, 02:15:35 am ---...
One thing however is that yew doesn't like being in wide thin bows. your layout isn't ideal for it. I would go narrow and thick. Certainly no wider than 1 1/4".
--- End quote ---
Eh? :o
That's not my experience. My "go to" field bow is Yew 15/8" wide near the grip with a graceful curving width taper out to v slim tips.
Del
freke:
If I could chose I would have done an english long bow -but on opposed limb there was several violation the back, among one big knot 2/3 out of the limb so with the limb width I have at least something around the knot so design is pretty much decided my the quality of wood - the shaping is maybe not the best but I try to keep both limb as equal as possible before glue up therefor has it been firs straighten with steam and then heat treated( lightly ) where I correct shape.
Dry heat was maybe not the best, but the crack/check was there before although it get way more visible - so I see the issue with dry heat but think I read somewhere that yew answer well to heat-treating?
There are loads of different CA / super glues on the market here - is there any better than the other and is there any specific to avoid? to look for, for example I use one bottle but some use with activator sparay etc) ?
simk:
in my personal experience yew really likes dry heat a lot - it reacts quickly and this does need a significantly less heat compared to other woods for the same effect.
the problem with heat corrections before glueup is, that as soon as you scrape of the really heat treated top layers the bow will start to creep back when you tiller it. therefore I'd suggest a reallly long and deep heat treat in corrected areas. talking from experience here....
gutpile:
appears your yew wasn't dry enough yet for the heat treat.. looks like you drove the moisture out of the wood causing the check.. JMO..gut
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