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I am intelligent enough to think for myself. I even took a few physics classes back in college! ... I can shoot your weight and momentum theory to hell and back with the "drinking straw propelled by the winds of a tornado example" - ... about 293 fps...bury 3-6 inches deep into trees(seen that with my own two eyes). ...How exactly would aluminums have helped me??? The aluminum would have given off a great deal of it's momentum and KE through oscillation of the arrow(if it didn't bend)...
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With respect to straws in trees, this from
http://www.usatoday.com/weather/reso...k/wasktorn.htm :
<BLOCKQUOTE id=quote><font size=1 face='Verdana, Arial, Helvetica' id=quote>quote:<hr height=1 noshade id=quote> there are confirmed reports of straws penetrating trees or boards in tornadoes. Years ago some thought that tornado winds were fast enough to drive straws into trees, but measurements of tornado wind speeds have shown that they rarely approach 300 mph. The air pressure inside a tornado is lower than the surrounding pressure, but is far from a perfect vacuum. The most generally accepted theory about what happens is that the winds bend trees or boards enough to open up the grains, a straw flies in and the tree straightens up when the tornado moves on. (12-29-96)
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As far as aluminums oscillating more on impact - I guess it is hard to think of a fair test due to carbons being lighter than aluminums for the same spine (true?). But I don't really have an opinion on aluminum vs carbon - well, I guess I think that carbon is a little better and more expensive - I just think that momentum is the right thing to look at when discussing penetration in a deer.
Well, since you brought up college physics, you probably got Newton's second law in about the third week of class: the force on an object equals the change in MOMENTUM per unit time.
beprepn
Edited by - beprepn on 01/15/2003 18:28:03