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Title: Wood arrow spine deflection
Post by: maxwell on November 07, 2009, 06:38:00 PM

Anyone know what the spine deflection is for wood arrows-
50-55, 60-65, 65-70, 70-75, 75-80. I'm trying to match up wood and alum. to get a woodie in the .440 to .475 range.

Thanks in advance,

Bill

Title: Re: Wood arrow spine deflection
Post by: Fletcher on November 07, 2009, 07:34:00 PM

.450 is 57.8 lb, .475 is 54.7 lb I would say you are looking for 55-59 lb shafts.

The formula is: 26/deflection = spine

At one time, spine was often measured and indicated by the deflection in thousandths of an inch rather than pounds. Occasionally I will see it written on old shafts from when they were spine checked.

Title: Re: Wood arrow spine deflection
Post by: maxwell on November 07, 2009, 08:58:00 PM

Thanks Fletcher- that helps alot. A little algebra and now I have a whole list of wood deflections.

Bill

Title: Re: Wood arrow spine deflection
Post by: maxwell on November 07, 2009, 09:02:00 PM

Thanks Fletcher- that helps alot. A little algebra and now I have a whole list of wood deflections.

Bill

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Main Boards => PowWow => Topic started by: maxwell on November 07, 2009, 06:38:00 PM