Primitive Archer
Main Discussion Area => Arrows => Topic started by: Buck67 on June 25, 2014, 01:56:13 pm
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A friend is 6'8" and has a 32" draw. He shoots a 60 pound longbow. I am going to make up some arrows for him and I was wondering what spline weight to use. I'm thinking that because he shoots a 60 pound bow and the arrows will be 6" longer than the 26" spline tester that he would need a 90+/- pound spline weighted arrow. I am going to use Tonkin bamboo or River Cane if it will test out right. I also got some 3/8" Poplar dowels from Lowe's to try.
Any input will be appreciated.
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80-85 spine would be about right. Doubt you will get that from any boo or cane.
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You can probably find tonkin to spine in that range. Some of the first tonkin cane I used was from 75# to over 100#. I ended up trading most of it off because it was too heavy. In fact if you go to the garden outlets it's most likely that anything you find 11 / 12mm on the large end will probably spine out heavy enough to use.
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The formula for calculating arrow spine is for a 28" arrow wit a 125gr point. For each inch over 28" subtract 5#. For 32" arrow 80# - 85#, like Pearlie said, should work. Being that cane arrows are draw weight tolerant it shouldn't be that hard to make. Make them long(34") and cut them down if necessary.
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You can probably find tonkin to spine in that range. Some of the first tonkin cane I used was from 75# to over 100#. I ended up trading most of it off because it was too heavy. In fact if you go to the garden outlets it's most likely that anything you find 11 / 12mm on the large end will probably spine out heavy enough to use.
Fred will conventional tips fit them you think? 23/64 maybe?
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PD, the original ones I purchased at that time were from Rudderbows. I ended up ordering premade foreshafts for them. I used some 23/64 points on others since but the fit on the taper was not as good as I prefer. If I remember correctly I did glue dowels into other shafts before tapering them.
With trade points or shell casing blunts you wouldn't encounter the taper problem.
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From my experience............Tonkin cane will spine much heavier than river cane of the same diameter.
I agree, and I believe you can find Tonkin in that spine and 11/32 points would work. I'm working about a doz 40-45# spine Tonkin and having a hard time finding some that light. 5/16 points works but 1/4 would be fine on some.
But pending how far from center shot the bow is, you might get by with some 70#er's. Like Pat said start a little long and a little light on spine......you can always cut them off a little at a time to get them tuned in. I bare shaft them at this point then fletch'm.
DBar
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Bareshafting them would be a good idea but he pulls a 60# bow and I'm doing good to pull a 45# bow. I have Tonkin bamboo and it is easy to find shafts that will go 90 to 125+ I'm using a sharpened duplex nailhead for a point so I don't have to mess with glue on tips fitting. Glad to know that I am on the right track. I'm making his arrows 33" long so I should be good. Thanks to everyone for their input.
The 3/8" dowel rods spline weight ran between 70 and 90 pounds. I will put a flint tip on one of them just for fun.
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Is that 60 lbs at his 32 inch draw ? Most amo on bows are at 28 in draw and if he is drawing it 32 it would be much more than 60 lbs. :)
Pappy
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Not sure what cane/boo you are not able to find high weights in spine, but I have cane here that is in the 100# spine range and find it fairly frequently.
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Is that 60 lbs at his 32 inch draw ? Most amo on bows are at 28 in draw and if he is drawing it 32 it would be much more than 60 lbs. :)
Pappy
Very good point Pappy............could make a world of difference. :) ;)