Reply
Go Back   TexasBowhunter.com Community Discussion Forums > Topics > Equipment and Tuning
 
Thread Tools Display Modes
Old 03-12-2018, 08:23 AM   #1
enewman
Ten Point
 
enewman's Avatar
 
Join Date: May 2009
Location: Odessa TX
Hunt In: Any where I can
Default momentum vs ke

https://1drv.ms/w/s!AtVqxLy9AZcGhAjGF_uVSsvsEN3q
enewman is offline   Reply With Quote Back To The Top
Old 03-12-2018, 09:01 AM   #2
noack920
Eight Point
 
noack920's Avatar
 
Join Date: Feb 2011
Location: Sealy TX
Hunt In: Where ever I can
Default

Good article.
noack920 is offline   Reply With Quote Back To The Top
Old 03-12-2018, 09:41 AM   #3
Rat
Ten Point
 
Rat's Avatar
 
Join Date: Oct 2006
Location: Bertram
Default

Good article enewman, I'm just going to put these here for future reference...

Momentum = Mass x Velocity / 225400
Kinetic Energy = Mass x Velocity˛ / 450800


Also, Front of Center formula; since adding weight up front is a great way to increase Momentum and get a higher FOC at the same time.

%FOC = (100 x (A - L / 2)) / L
L = Length of arrow from throat of nock to the end of the shaft.
A = Length of arrow from throat of nock to the balance point with the tip on the arrow
.

As a primer, can you also post the chart for minimum recommended grain per inch of arrow eight per pound of peak draw weight?
Rat is offline   Reply With Quote Back To The Top
Old 03-12-2018, 10:21 AM   #4
popup_menace
Pope & Young
 
popup_menace's Avatar
 
Join Date: Jan 2011
Location: El Campo, tx
Hunt In: Back yard, stand, or my dreams
Default

Yea, but a faster bow gives me more KE, and the number is bigger when you use KE... so it has to be better than momentum!
popup_menace is offline   Reply With Quote Back To The Top
Old 03-12-2018, 12:48 PM   #5
enewman
Ten Point
 
enewman's Avatar
 
Join Date: May 2009
Location: Odessa TX
Hunt In: Any where I can
Default

Quote:
Originally Posted by popup_menace View Post
Yea, but a faster bow gives me more KE, and the number is bigger when you use KE... so it has to be better than momentum!
Sounds good to me hehe
enewman is offline   Reply With Quote Back To The Top
Old 03-12-2018, 12:59 PM   #6
popup_menace
Pope & Young
 
popup_menace's Avatar
 
Join Date: Jan 2011
Location: El Campo, tx
Hunt In: Back yard, stand, or my dreams
Default

Quote:
Originally Posted by enewman View Post
Sounds good to me hehe
Lol!

For real though, great write up.
popup_menace is offline   Reply With Quote Back To The Top
Old 03-12-2018, 01:42 PM   #7
enewman
Ten Point
 
enewman's Avatar
 
Join Date: May 2009
Location: Odessa TX
Hunt In: Any where I can
Default

Quote:
Originally Posted by popup_menace View Post
Lol!

For real though, great write up.
Thank you
enewman is offline   Reply With Quote Back To The Top
Old 03-12-2018, 04:06 PM   #8
DRT
Pope & Young
 
DRT's Avatar
 
Join Date: Dec 2009
Location: Fort Worth, Tx
Hunt In: Jones and San Saba Counties and Missouri
Default

Fluff

Sent from my SM-J710MN using Tapatalk
DRT is offline   Reply With Quote Back To The Top
Old 03-12-2018, 04:19 PM   #9
Hardware
Eight Point
 
Hardware's Avatar
 
Join Date: Oct 2010
Location: Brazoria County
Hunt In: Texas, Western US & Argentina
Default

Seems this pops up every few months!!!
Hardware is offline   Reply With Quote Back To The Top
Old 03-12-2018, 04:34 PM   #10
popup_menace
Pope & Young
 
popup_menace's Avatar
 
Join Date: Jan 2011
Location: El Campo, tx
Hunt In: Back yard, stand, or my dreams
Default

Quote:
Originally Posted by DRT View Post
Fluff

Sent from my SM-J710MN using Tapatalk
Tell us how you really feel
popup_menace is offline   Reply With Quote Back To The Top
Old 03-12-2018, 04:46 PM   #11
enewman
Ten Point
 
enewman's Avatar
 
Join Date: May 2009
Location: Odessa TX
Hunt In: Any where I can
Default

Quote:
Originally Posted by Hardware View Post
Seems this pops up every few months!!!
that's because I was testing OneDrive I do apologize since this bothered you.

I do have other papers coming. they are not as technical. but it all fits into building a hunting arrow

thanks for looking

Last edited by enewman; 03-12-2018 at 05:08 PM.
enewman is offline   Reply With Quote Back To The Top
Old 03-18-2018, 09:33 PM   #12
Briar Friar
Ten Point
 
Briar Friar's Avatar
 
Join Date: May 2015
Location: Texas
Hunt In: San Gabriel, Colorado and Rio Grande watersheds
Default

I like the equal KE pingpong 2700fps vs bowling ball 1fps comparison.

(This onedrive article loaded alot easier on my iphone than the spine check pdf.)

Good stuff Enewman.
Briar Friar is online now   Reply With Quote Back To The Top
Old 03-18-2018, 09:51 PM   #13
Low Fence
Pope & Young
 
Low Fence's Avatar
 
Join Date: Aug 2008
Location: Quitman, Tx.
Default

Most comparisons aren’t quiiieeeettt as big as most make them.

“ ping bong vs bowling ball”.... geeezzzz

“Motorcycle vs train”... come on

A real comparison would be closer to an 11” softball @ 190 mph vs a 12” softball @ 175.

Everything in moderation even “momentum” for let’s say an elk arrow. If you need a 20,25,30 yard pin your at a disadvantage to the faster arrow..... that has been getting it done for decades. That said there’s moderation that way also

I find most analogies of mass comical in bow hunting. Perfect flight and shot placement are more important (imho) but that just been my experiences
Low Fence is offline   Reply With Quote Back To The Top
Old 03-19-2018, 07:13 AM   #14
enewman
Ten Point
 
enewman's Avatar
 
Join Date: May 2009
Location: Odessa TX
Hunt In: Any where I can
Default

Quote:
Originally Posted by Low Fence View Post
Most comparisons aren’t quiiieeeettt as big as most make them.

“ ping bong vs bowling ball”.... geeezzzz

“Motorcycle vs train”... come on

A real comparison would be closer to an 11” softball @ 190 mph vs a 12” softball @ 175.

Everything in moderation even “momentum” for let’s say an elk arrow. If you need a 20,25,30 yard pin your at a disadvantage to the faster arrow..... that has been getting it done for decades. That said there’s moderation that way also

I find most analogies of mass comical in bow hunting. Perfect flight and shot placement are more important (imho) but that just been my experiences

I used the bowling ball because for what ever reason that seams to be what people do. Or it’s a truck and a car. Or s train. In on of my revisions I had a golf ball and a ping pong ball.

Perfect flight is important. Matter of fact if you look at the 12 penetration factors tuning for flight is number 2.

This paper is just to show momentum and why we need to look st it. It is part of another paper I’m working on.

Last edited by enewman; 03-19-2018 at 07:17 AM.
enewman is offline   Reply With Quote Back To The Top
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 01:47 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2018, vBulletin Solutions Inc.
Copyright 1999-2012, TexasBowhunter.com