Ashby on light weight bows...

[trashwood]

Ya remember the old outsert Beeman hunter shafts.  shaft about the size of a knitting needle?  Get a 35#@28" draw bow.  leave the beeman 4060 shaft full length then load the front of the arrow up with enough weight to tune the arrow. last put a two balde 125 gr magnus up front, good and sharp.  

If shot at a new foam stacked target, nothing else I have shoot out of the 35# out penetrated the old beeman hunter.  So in think shaft friction must have sumpin to do with the amount of penetration.  even with the outsert skinny slick  shafts penetrate pretty dang well from a light bow.

rusty

[nightowl1]

Well I thought i was polite with my statement, if not I apologize. This is a light hearted discussion about things that we love to do as a hobby, so lets ease up and enjoy the company of those who share our interest and views of what we have been blessed with. The minute this becomes work and a headache, I'm outta here.
I have enough things to devote my attention.

If you want a real hardlined debate on this, I'm goint to have to step out cause frankly I really don't care. Like i said I'm confident in my setup I just thought it was a neat discussion.

So have fun, joke around and lets not treat this like we are making a Traditional Bowhunting Constitution.

[Orion]

Joker and Ray, thanks for the voices of reason.      

[JOKER]

"They were not handed down from the mountain like some seem to believe however."

Isn't that the truth, just ask Dr Ashby how much time and effort he has in all that testing and recording all that info. No, this info is strictly for people that want to learn and come up with the best arrow they can shoot. YOU WILL HAVE TO THINK FOR YOURSELF TO GET THE FULL POTENTIAL FROM THIS INFORMATION. That's right, noware in Dr. Ashby's reports will he tell you what is the best arrow for you. You will have to use his findings and deside for yourself what kind of arrow you want to build and shoot. These findings only tell you what effects different aspects of an arrow had on penatration. IE. arrow weight, FOC, arrow integraty, arrow diameter, broadhead design,...

The great thing about penatration info is it can be used by everyone!!! Just for some examples, you can use aspects of ashby's findings to get more penatration if:
1. you shoot a light weight bow.
2. you have a short draw.
3. you want to shoot a big broadhead to get more blood on the ground.
4. you want to shoot a lighter arrow for beter trojectory.
5. you are hunting large, hevey game.

Just remember no one said that you need to use all of ashby's findings and make the ultimate penatrating arrow. That is unless you are going to hunt something like cape buffalo.

Steve

[GMMAT]

I can tell you for a fact.....that there can (no theory) come a point of diminishing returns when adding weight to your arrow (assuming we're talking about all arrows being shot from the same bow).  If you've never gone through this exercise (all you need is a chrono, lots of tips and a calculator), I can see how you'd make statements of "absolutes".  If you have, you probably snicker when you read said, like I do.

Your average human doesn't have the mental capacity (nor does he need it, for such a seemingly trivial exercise) to determine whether to utilize KE or momentum for where to set the bar.  You needn't be a scientist (and Ashby isn't, either).  If you continue to add weight to your arrow.....your speed will diminish to the point that your KE will go DOWN.  No theory.  There IS a point.

[JOKER]

GMMAT is right, when going up in arrow weight there is a point where KE is at it's max. However KE is not the same as momentum and does not totally deside penatration. KE=0.5mv^2 & M=mv. KE is more efected by velocity than momentum because velocity is squared.

But for all practial perposes there is a point where a heavy arrow is not practial. Where this is depends on what you want from your setup.

Steve

[GMMAT]

And Ray.....

I JUST noticed that you singled me out.  I made no "poo-poo" statements to the man's works.  I simply stated....well....it's pretty simple.

You can talk amongst yourselves, now.  I'm out.

[Guru]

Well you guys have managed to get another thread locked down....

Singling people out and getting sideways with them is not the way to do things...