Wood arrow spine deflection

[maxwell]

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

[Fletcher]

.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.

[maxwell]

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

Bill

[maxwell]

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

Bill