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Main Boards => The Bowyer's Bench => Topic started by: litoduk on January 23, 2016, 06:45:00 AM
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Hi good morning everyone! I want to do a stupid query. But as I read I do not understand. e been looking for an explanation but not and managed to find it.
laminations that are conical, or candles? or in what way are they? one longbow r / d longbow r / d xtrem necessarily need conical laminations? it is wrong not to take them?
I read in some American place (in Spain this is not spoken about anything lol) with parallel laminations is not bad, the arc is fast algomas and hunting is better.forgive my clumsiness. if there is a thread there redirects me thanks in advance !!! :knothead:
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There are no stupid queries. But the Translator may not be working right. You wrote "conic laminations or candles".
"Conic" lamination would mean "section of a cone" or rounded somehow. A "candle" is a stick of wax with a string in the middle, used in churches and birthday cakes and as a light sometimes.
Laminations are either Parallel -- the wide, flat surfaces are equal distance apart from end to end; or Tapered -- the wide flat surfaces are farther apart at one end than at the other (a wedge or long shallow triangle). The taper or difference in thickness is on the order of .02 mm.
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Okay, so let's say that the sheet has 20 ' ' total length of cut that difference of 0.02 mm of the total length of the sheet ?
or would only cut a few cm and longer ?
then the difference in thickness is stuck as this or puts another wedge to compensate for the thickness ?
Forgive this :)
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A tapered lamination might be 37mm wide and 750mm long. At the end near the handle it might 1.778mm thick, and at the end near the tip of the bow it might be 1.727mm thick.
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I'll try to help. Bows can be made with only parallel laminations,with a combination of parallels and tapers or with only tapers. Wood laminates are often sold in 36 inch/ 91,44 cm lenght.
A common taper rate is .002, that means that the laminate is getting two thousands of an inch thinner for each running inch.
A 36 inch long laminate that is .100 inch / 2,54 mm thick in one end will be .028 inch/ 0,71 mm thick in the other end.
A common combination in a recurve limb is one parallel and one .002 taper plus the glass fiber
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Maybe this will help.
http://s25.postimg.org/48kmj3ozz/Paralled_Tapered.jpg
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thank you. Now if I understand. but it seems difficult to make a conical sheet and control the recess of only those few mm. I want to create a couple of longbows and other hybrido rd.
I was thinking of using only 2 parallel plates. haun that many here see there using three sheets. that occurs only using parallel? is so bad?
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¡Hola!
I would think you're better off looking for a supplier of tapered laminates, there must be someplace to buy these.
Or find a wood workshop or carpenter who can make laminations to your specifications.
Jan
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Forgot to add: if all else fails, simply order from 3rivers or any of the shops in the US. Or rudiweick.de in Germany to avoid customs trouble.
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thanks friend. if it costs me to understand what the conical sheets but I get it. looking old posts q someone commented Rudi also sells fiber and conical strips. Shipping 20 €.
the answer me a quick email. He told me his fiberglass is of better quality than Bearpaw. the custom fiberglass is less likely to contain stripes. I boy to test and comment.