New Easton Arrows for 2007

[moo-mop]

Originally Posted by BowSurfer

Is that true? I wouldn't have thought that a spun carbon fibre tube had a lot of inherent stiffness at all - isn't that why pure carbons have to have much thickar walls? I had always assumed that the carbon went on the outside, not for meechanical reasons, but because it was easier to apply to the outside of tube than to the inside.

It was a question, somebody on the board will know about this for sure I hope, it was many many years ago I last did any material science!

[Jerry Tee]

As far as bending goes it won't make as lot of difference. Consider, the arrow is bent then on one side of the arrow the alloy is going to under compression and carbon is going to be under tension. On the other side of the tube the alloy is going to be in tension and the carbon is going to be under compression. The same will be true if the carbon is on the outside or the inside.

[Fox]

You should apply for George's job at Easton.

[moo-mop]

Originally Posted by Jerry Tee

As far as bending goes it won't make as lot of difference. Consider, the arrow is bent then on one side of the arrow the alloy is going to under compression and carbon is going to be under tension. On the other side of the tube the alloy is going to be in tension and the carbon is going to be under compression. The same will be true if the carbon is on the outside or the inside.

Correct, therefore, the stuff on the outside will therefore always be bent more than the stuff on the inside, hence to stop it bending and make stiffness I think you want the outside to be stiff...
Where is joe tapley when you want him? This seems just the sort of question he would love to answer

[timppa]

Originally Posted by grantwomack

Hmmm, I see two images... only the one you linked is a little fuzzier. I guess my computer is being strange... Thanks!

Me too now....
Must be this Mexican WLAN, it works and not.

[CPlater1]

Those x10s look nice. I may have to get some next year, as I need new arrows anyway!

[joetapley]

With a bent stick the further you are away from the "axis" the more the stick material is stretched or compressed. Thats why with aluminium arrows you have the air on the inside and the aluminium on the outside rather then the air on the outside and the aluminium on the inside . So to get a thinner arrow you have to make the wall thicker - less stretch but more material being stretched - same overall stiffness. This is the everlasting trade off with arrow shafts for target. You would like thinner shafts but thinner shafts end up heaver as need a thicker wall for the same stiffness. Carbon is much stiffer than aluminium so you can make the arrow shafts thinner for the same weight.

[Huffy]

Has anyone an idea on how the Easton Full Metal Jacket arrow is produced. I cannot imagine that a carbon shaft is slid into an aluminium tube and glued in place.

Best wishes , Mark

[sky_high30]

I'm going to say a carbon tube with the aluminium wrapped around it. I could be wrong, that would be the most sensible way of doing it.

[Jerry Tee]

Originally Posted by moo-mop

Correct, therefore, the stuff on the outside will therefore always be bent more than the stuff on the inside, hence to stop it bending and make stiffness I think you want the outside to be stiff...
Where is joe tapley when you want him? This seems just the sort of question he would love to answer

You should not confuse the inside and out side of the shaft with the inside and out side of the curve of the arrow caused by a bend