EFOC effect on arrow shaft lifespan

[Bladepeek]

This sounds like a perfect opportunity for some dedicated shooter to spend 40 hours a week shooting arrows with identical dynamic spine (a weak arrow with a light point and a stiffer arrow with a heavier point) and after a year or so we should have an answer to this troubling question.

Of course all this goes out the window if he screws up and hits a rock.

[Doc Nock]

BP, with carbon generating one oscillation off the riser in paradox snd then no more, I'd think that shooter better spend 40 weeks shooting shafts...

I have some shafts GT 5575 that are 12 yrs old and been shot endlessly... still fly the same.

[CRS]

Doc Nock,
Excellent, I was just thinking of the initial paradox and how a heavier point would cause more stress.  

But wood and aluminum would have more stress per shot because of the flexing all the way to the target.

Just another reason that carbon is a good material.  Eventually you could wear out a carbon.  But with it flexing less per shot and being a better material it is a win win.

The only way to set up test would be to design a "paradox" machine.  Kind of like a spine tester.  Take three shaft of the same spine and flex them 100 times, remeasure static spine, repeat for 10-100 thousand flex repetitions and see how much static spine is lost.  There is no doubt carbon would win, but by how much?

One would think that Easton would have done many of these torture type tests in development and testing of their shafts.