Main Discussion Area > Flight Bows
Light arrows
Selfbowman:
Let's say 28".
Philipp A:
how thin can one make a flight arrow from hardwoods like ash etc? Does a rain drop shape point help distance?
avcase:
For what it’s worth, I have been working on a way of estimating an arrow’s potential based on a spine/deflection measurement of a straight arrow shaft, plus a measurement of the mass, length, and diameter of the straight shaft. The calculation comes up with an arrow weight for a good performing barreled Flight arrow design based on the desired spine, bow characteristics, and arrow length.
For example, for a 28” long flight arrow for a 70# bow with 63 ft-lb of stored energy and 175 grains virtual mass, I get the following stats for a barreled Flight arrow:
Western Larch/Tamarack:
Finished arrow weight 350 grains, max diameter .317”/8.06mm, launch speed 232 fps
Douglas fir from a recycled book shelf:
Finished arrow weight 364 grains, max diameter .341”/8.66mm, launch speed 230 fps
Sitka Spruce:
Finished arrow weight 275 grains, max diameter .343”/8.70mm, launch speed 251 fps
So, given the different arrow diameters, weights, and launch speeds, which of these arrows will fly furthest? ;)
Alan
DC:
Would you please explain the "Virtual Mass" of the bow. I'm not sure if I've heard of this.
My guess would be Spruce, Larch and then Fir :D
DC:
I think i found it here s://sites.google.com/site/technicalarchery/technical-discussions-1/virtual-mass---the-key-to-understanding-arrow-speed
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