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Does some woods hold heat longer? & bow build
Selfbowman:
Still pouring the heat to this hickory. This is the strangest bow I’ve ever built. The limbs are turning out thinner than my Osage bow of the same dimensions. Physical mass tells me this should not be. Wood that’s less dense floats higher in the water. Which tells Arvin and the bowyers bible it should take more physical mass than Osage. But it seams to be coming out less. I don’t get it. What is the heat doing to this hickory to make this happen???? Wood has sap . Least I’m going to call it that. Could it be sap is turning liquid during the heat process then when it cools filling the voids in the cells. Then cooling like roofing tar? This is Weird like those people in Austin Tx.🤠🤠🤠
Bob Barnes:
This is very interesting Arvin...you're sure making it sound like the whole "firehardening" thing could be true. I'm sure looking forward to the finished product. :OK
superdav95:
--- Quote from: Selfbowman on December 27, 2023, 12:58:42 am ---Still pouring the heat to this hickory. This is the strangest bow I’ve ever built. The limbs are turning out thinner than my Osage bow of the same dimensions. Physical mass tells me this should not be. Wood that’s less dense floats higher in the water. Which tells Arvin and the bowyers bible it should take more physical mass than Osage. But it seams to be coming out less. I don’t get it. What is the heat doing to this hickory to make this happen???? Wood has sap . Least I’m going to call it that. Could it be sap is turning liquid during the heat process then when it cools filling the voids in the cells. Then cooling like roofing tar? This is Weird like those people in Austin Tx.🤠🤠🤠
--- End quote ---
The beauty of fire hardening white woods. Lignins and pectins in the wood harden up and make the wood less likley to take on moisture. You will have noticed perhaps that when you pulled the bow off the caul the clamps were loose. The bow wood cells shrink and condense in size some in addition to the lignins and pectins hardening.
Selfbowman:
Bob it’s coming along. I’ve had it to 20” but I got the ends to thin and they want to pull out so I might not hit 50#. I still have more to pull off the inner limbs so hopefully the ends will be ok. I. Wanted to test this bow to the same design Of Osage 47@28”,
Bob Barnes:
I certainly hope it makes your draw weight... it's my hunting draw weight and I have a stave to try if it works. :) :OK
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