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Main Boards => The Shooters FORM Board => Topic started by: Doc Pain on December 30, 2009, 08:16:00 AM
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I'm getting what I feel is excessive wear to the sideplate on my arrow shelf. Also occasionally a little slapping sound. The arrow has just a little fishtailing the first 5 feet or so but corrects fairly quick. By the time it enters the target at 5 yards, the arrow is straight and the nock is pointing straight back at me. Is this a sign of spine error or operator error? Even with a very loose grip I still have the same result, so I do not think that I am torqueing the bow upon release. If it is spine, should I go stiffer or weaker? Any and all suggestions appreciated.
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It is a spine problem and it would appear you are to stiff on the spine. A properly flexing arrow will have the fletching arc'd away from the riser as it passes by the riser on the your bow. A spine stiff arrow will have the fletching end of the arrow bent towards the riser as it passes. If you are getting hits ( slaps ) on the riser you are way stiff. Throw some extra weight on the front and see what happens. By extra weight, I would be adding 50 grains to 100 grains up front. It may correct the problem. Otherwise by a weaker spined arrow.
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Really need more details Doc. Bow weight and arrow spine and length. This can also be caused by too low of a brace height. A low brace height will hold the arrow to the centerline of the bow longer and it doesn't have time to flex out of the way.
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Raise your brace height until you get to the bows'max brace height. If you still have contact, then start adding weight. Bill
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I raised the brace height in 1/8" increments. I ended up 1/8" past the recommended max height, but it helped straighten out the arrow plus made the bow quieter. I am shooting a three piece longbow 50# at 27 inches. I have scaled it so I know that the weight is true. I had a bunch of 2114 XX75 shafts and cut some to 27 1/2". Do you think that they would be too stiff or could I put enough weight up front to make them work? If not, what would you recommend.
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Yep, I'd say too stiff! Try a 1916 or at most a 2016. Your 2114s will need LOTS of point weight -- like maybe a small anvil?
Doc - Most of my 50 pound range bows like 1916s and 2016s and I draw 29.5. With your shorter draw length I'd think 1916s are your starting point for Aluminum arrows.
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moebow,
What do you think would be a good place to start with carbon. If I'm gonna have to start over with new arrows, I think that carbon would be the way to go.
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Doc, I'll defer to others here on the forum about carbons. I've NEVER had a good experience with them and will not use them. Others are very happy with carbons and could advise you much better than I. I like wood and aluminums as that is what I've used since high school in the early 60's. I fall into the "old dog, new tricks" category.
That said, 1916s have a .623 published spine deflection rating and a 10 grain per inch weight. 2016s are .531 and 10.6 grains per inch. Carbon has a different recovery rate than wood or aluminum but some where in that range ought to get you in the ballpark.