Main Discussion Area > Arrows
Spine chart
DC:
I've given a few bows to kids at the range and they seem to want to use carbon arrows. Is there a chart that would convert AMO spine(pounds) to Easton spine(deflection). I just want ball park static spine. I've done a Google search and anything I've found seems to want to get into dynamic with a bunch of inputs. One site had a half dozen or more(I didn't scroll all the way down) charts and had the gall to call it "simple". I could do the arithmetic but in this day and age someone has usually done it and posted the results(I'm lazy) ;D ;D
Urufu_Shinjiro:
^ What he said....
aaron:
The short answer is to use .600 shafts for kids bows and most primitive bows. For kids bows to be well tuned, you would want even less spine, but a .700 or more shaft is hard to find.
The long answer, I believe, is that 26/inches deflection= amo spine in lbs.
So a .500 shaft is about 52. A .600 shaft is 43 lbs.
aaron:
If Easton measures deflection at 28 inches, the numbers may be off a little, but still in the ballpark.
aaron:
I know a guy who swears by gt trad 15/35 with a footing made from aluminum 2117 shafting. Full length with a weighted insert works good for my , I mean his, 40 lb wood bows. Very durable
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