Primitive Archer
Main Discussion Area => Bows => Topic started by: TreyNC on June 19, 2007, 07:56:58 pm
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I hear about people doing both, just wandering if one was any different from the other?
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From my experience the boiling doesn't work near as good and the steaming. It takes longer. I would guess it increases the moisture content a lot more too. Justin
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My thought is just the opposite.I have a 4'x 2 1/2"stainless tube I set on my turkey cooker.In less than 20 minutes I can bend wood by boiling.I don't worry about the moisture,It's hot here and the humidity is right there with it.I let it dry for a day and then in the hot box.I can boil a dozen cane arrows at once,like spaghetti.
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Eddie, I am probably using to big of a container. I have a hard time getting the water hot enough to bend the wood good. Maybe I better get a turkey cooker. It cooks turkey, bends wood, and cooks rock. ;D Lets see your set up. You should know I was going to ask for pictures. ;D Justin
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Water boils at 212deg(F) and then turns to steam which cools quickly so actually boiling water is hotter than steam. It is the heat that makes wood bendable not the water. The water is the carrier for the heat and maybe a lubricant. by immersing the wood into boiling water you are allowing it to absorb the heat evenly all over. Pat
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Uh Justin..........I woulnd't cook rock in yer turkey cooker when ya get one ! :o :o :o ;).........bob
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Uh Justin..........I woulnd't cook rock in yer turkey cooker when ya get one ! :o :o :o ;).........bob
Heck, I don't know why not. On second thought, if I cant get it hot enough to bend wood, I probably cant cook rock. ;D
I guess Ill go to Home Depot tomarrow and buy some pipe and a cap and try boiling again. Using a big pot don't work.Justin
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Justin I'll take a picture tomorrow.I don't use the pot to boil.My buddy welded a flate plate on the bottom of the pipe.I can stick the whole limb in at once.
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You are a little smarter than me, but we knew that. I used a pot big enough to fit half the limbs, and full enough to cover the wood when I got it in there. :P Nobody ever accused me of being smart. Especially not my wife. Justin
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Do you need Marie to tutor you? ::)
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UMMMMMM NO, I mean no thank you. Justin
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I believe that you can apply more heat to the wood by using steam. That's because boiling water (or any liquid for that matter) cannot get hotter than its boiling point. To change the state of water from liquid to steam, however, requires substantial additional energy. This is called the latent heat of vaporization. When steam condenses the additional calories are transfered to the wood as heat.
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I believe you are right Gordon. In fact, I know you are. If it were colder than the water, it would be water. ;D If you put it all in the container, the hottest part of any liquid goes to the top. (With the exception of frozen water. When it gets below 4*C it begins to rise again.) This includes the steam. If you put the tin foil on top like RyanO it holds the heat in and the area above the liquid water is hotter. The reason I have had better luck with steam, is because you can heat a smaller amount of water to a high temperature faster. Then the steam fills a larger container than the water did, making it easier to immerse the bow in the heat. Justin
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Having tried both, I greatly prefer steam. I usually use a setup consisting of a coffee can on a Coleman stove. I lay the limb across the can and seal it off with aluminum foil. 30-45 minutes of this will usually temporarily turn about any wood to rubber.
When it gets below 4*C it begins to rise again
Justin, what does "C" mean? :) No habla Celsius. This is the land of Fahrenheit, dude. ;D
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When it gets below 4*C it begins to rise again
Justin, what does "C" mean? :) No habla Celsius. This is the land of Fahrenheit, dude. ;D
This is an international community now. That was for our friends north of the border and the others across the pond. For your benefit, that is 39.2*F.. Justin
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I have always wondered about using a little pressurized steam on some of the more stubborn woods, just putting ateam under 50# pressure will allow you to go up to 300 degrees. By putting on at least 2 pressure relief valves on a pipe and adjusting the flame so that the valves were just barely popping off i think it would work pretty well. But could be dangerous if someone didnt know what they were doing. Steve
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Get an old pressure cooker and use the weight and safety pop off from the lid. Justin
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You could just cut the offensive portion of the limb, drop it in the pressure cooker and turn it on. ;D
Pat