Arrow Decelleration
03-04-2007, 11:01 AM
#1
Thread Starter
Join Date: Mar 2005
Location: Colorado
Posts: 4,127
Arrow Decelleration
I'm wondering about how much an arrow slows down flying through the air. For instance, does a 60# bow hit as hard at 40 yards as a 50# bow hits at, say, 20 yards. Anyone have a ballpark idea of what sort of ballistic coefficient an arrow might have? I'm thinking that, due its length, it will be very high. Thanks. Roskoe
03-04-2007, 12:25 PM
#2
Join Date: Mar 2004
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Posts: 13,082
RE: Arrow Decelleration
That's an interesting thought. I've never really thought about it specifically, though I know a heavier arrow maintains it's speed and energy longer than does a light one. I'm not sure how much the draw weight plays into the equation other than allowing you to shoot a heavier arrow....
Very interesting thought....
Very interesting thought....
03-04-2007, 04:22 PM
#3
Giant Nontypical
Join Date: Feb 2003
Location: HENDERSON KY USA
Posts: 6,634
RE: Arrow Decelleration
Get an archery program like www.archersadvantage.com As much as you are playing with the numbers,the $60.00 will be well worth the money.
It is much more accurate than the one you were playing with on the net.
It will tell you what different setups shoot at different yardages and their ke at those yardages.
It is much more accurate than the one you were playing with on the net.
It will tell you what different setups shoot at different yardages and their ke at those yardages.
03-04-2007, 04:37 PM
#5
Giant Nontypical
Join Date: Feb 2003
Location: HENDERSON KY USA
Posts: 6,634
RE: Arrow Decelleration
I ran some numbers of a 28 1/2" vectrix.
I used 6 grain per pound for each setup.
60# at 40 yards yielded 48.2 ft lb of ke. 360 gr arrow
50# at 20 yards yielded 45 ft lb of ke 300 gr arrow
The 50# bow shot the 360 grain arrow at 20 yards with 45.4 ft lb ke.
I used 6 grain per pound for each setup.
60# at 40 yards yielded 48.2 ft lb of ke. 360 gr arrow
50# at 20 yards yielded 45 ft lb of ke 300 gr arrow
The 50# bow shot the 360 grain arrow at 20 yards with 45.4 ft lb ke.
03-04-2007, 04:54 PM
#6
Thread Starter
Join Date: Mar 2005
Location: Colorado
Posts: 4,127
RE: Arrow Decelleration
The difference in arrow weight is creating an "apples and oranges" conflict in my thought process. Can you determine, from that program, how the same arrow from the same bow holds its speed at 3 feet, 20 yards, 30 yards, 40 yards, and 50 yards? THx. Roskoe
03-04-2007, 05:40 PM
#9
Giant Nontypical
Join Date: Feb 2003
Location: HENDERSON KY USA
Posts: 6,634
RE: Arrow Decelleration
Sorry,i was just responding to the apples to apples comment.
I used the 360 gr arrow out of the 50# and the 60# bow for the speed comparisons.
50# at bow 254 fps
20 yards 240 fps
30 yards 233 fps
40 yards 227 fps
60# at bow 278 fps
20 = 263 fps
30 = 256 fps
40 = 249 fps
NOW,the 50# bow with a 300 grain arrow
at bow 274 fps
20 = 259 fps
30 = 251 fps
40 = 243 fps
I used the 360 gr arrow out of the 50# and the 60# bow for the speed comparisons.
50# at bow 254 fps
20 yards 240 fps
30 yards 233 fps
40 yards 227 fps
60# at bow 278 fps
20 = 263 fps
30 = 256 fps
40 = 249 fps
NOW,the 50# bow with a 300 grain arrow
at bow 274 fps
20 = 259 fps
30 = 251 fps
40 = 243 fps