Now it's fine to come up with theoretical examples like "equalizeing" KE between 2 arrows to make a point but of course you must also accept that by chainging arrow weights it is impossible for this to happen for a given archer.
I don't know why that would be impossible. I alway shoot at a draw weight that is well below my maximum draw capacity. I have many dozen of arrows, that are of different weights. If I wanted to shoot an arrow with higher K.E., but with less momentum than my typical medium to heavy arrow, it would be very easy to do. This may not be a solution for the average archer, but it does not seem impossible. It's not a choice I see myself making, because I believe that weight should be as high as you can get without trajectory being affected to a great degree. Anyway, this discussion hasn't been limited to what the average archer should do, but has had a lot of theory and science injected.
All I'm really saying is, in a situation where a person wants more penetration and they have already paid attention to factors like blade design & sharpness, FOC and arrow stiffness, they would be better off concentrating on improving factors (weight) that are favorable to higher momentum measurements, rather than things (speed) that are favorable to higher K.E. measurements.
P.S. Straightarrow, I just want to thank you for the way you have been disussing this issue. Though it's clear you don't agree with everyting I've said you have kept your comments tehnical and without a sign of rudeness or sarcasm. I hope I have not offended you in any way as well.
I have never been offended by a disagreement on a subject. I am bothered by personal statements that are intended to demean me, rather than argue their point on the subject, but you never did that - at least to me.
