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  #1  
Old 12-08-2019, 03:33 PM
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Maddog20/20 Maddog20/20 is offline
 
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Default Arrow Speed

Just curious about where we all are. I donít really care much about draw weight as limb design makes that such a weird variable. To me, the rubber hits the road with arrow speed.

What speed and arrow weights are you guys getting out of your hunting rigs? Iím kicking around 177fps average with my 520gr arrow.

Just wondering where I am relative to the ďaverageĒ (whatever that is in a group so varied).


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  #2  
Old 12-08-2019, 04:10 PM
oldgoat oldgoat is offline
 
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Default Re: Arrow Speed

At 11.22gpp I'm right there with you on my heavier longbow. 640gr arrow, bow is 57#@31". On my lighter longbow, it's a little slower, 11gpp and it shots 172fps, 520gr arrow 47#@31"
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  #3  
Old 12-08-2019, 04:19 PM
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Default Re: Arrow Speed

I’m around 200 FPS at 10 gpp give or take a few FPS
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  #4  
Old 12-08-2019, 06:31 PM
sheepdogreno sheepdogreno is offline
 
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No clue but I been thinking about buying a chrono bc I’m always interested and I enjoy tinkering
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  #5  
Old 12-09-2019, 03:36 AM
horseman308 horseman308 is offline
 
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Default Re: Arrow Speed

I'm getting around +/- 157 fps shooting 13.25 gpp. So a little slower than many for the heavy arrows. Nn 10 gpp I'm up around 175.

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  #6  
Old 12-09-2019, 07:11 AM
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Default Re: Arrow Speed

Quote:
Originally Posted by JParanee View Post
Iím around 200 FPS at 10 gpp give or take a few FPS


With the super recurve? Those babies pack quite a whollop.


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  #7  
Old 12-09-2019, 07:22 AM
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stevelong stevelong is offline
 
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Default Re: Arrow Speed

I got an average with 10 shots of 8.9 gpp with my ILF longbow limbs......mid 190s.
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  #8  
Old 12-09-2019, 07:36 AM
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Default Re: Arrow Speed

I'm shooting a 575 grain arrow at 174. I'm also doing it with 39 pounds, so bow weight does make a difference. The arrow is almost 15 gpp.

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  #9  
Old 12-09-2019, 08:31 AM
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Default Re: Arrow Speed

Despite what you were told on another site, when shooting without sights speed does have an impact when aiming at longer distances.

Also speed are necessary parameters when figuring momentum and Kinetic Energy (KE). When hunting, shot placement, broad head selection and sharpness, and state of tune are very important. But keep in mind that nothing happens without energy and momentum.

As for me, speed is dependent upon application. Indoor competition, about 140 fps. Hunting, I seem to always come out around 170-180 fps. Competition at longer distances (50 yards+) I'm running around 200 fps.
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  #10  
Old 12-09-2019, 11:17 AM
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Default Re: Arrow Speed

My hunting bow is 51 @ 30.5, shooting 10.9 gpp I'm running 200 fps.

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  #11  
Old 12-09-2019, 11:57 AM
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Default Re: Arrow Speed

A question for people much much cleverer than me ...

if you divide the feet/sec speed of the arrow by the grain/lb arrow mass draw force, will the product number be an indication of bow performance ..

..example being
Quote:
I’m around 200 FPS at 10 gpp give or take a few FPS
.. 200/10 =20

Quote:
I got an average with 10 shots of 8.9 gpp with my ILF longbow limbs......mid 190s.
... 190/8.9 = 21.34

We now have two numbers, 20 and 21.34, which is the better performing bow
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Last edited by Phil; 12-09-2019 at 12:10 PM.
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  #12  
Old 12-09-2019, 01:05 PM
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I believe that is just creating an idex with weird units (ft*lb)/(grain*seconds). But, given all that info we can easily calculate momentum and kinetic energy which are excellent ways to compare function
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  #13  
Old 12-09-2019, 01:14 PM
ryddragyn ryddragyn is offline
 
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Default Re: Arrow Speed

Quote:
Originally Posted by Phil View Post
A question for people much much cleverer than me ...

if you divide the feet/sec speed of the arrow by the grain/lb arrow mass draw force, will the product number be an indication of bow performance ..

..example being .. 200/10 =20

... 190/8.9 = 21.34

We now have two numbers, 20 and 21.34, which is the better performing bow
Too many other variables to simplify it like that. Need to standardize the draw length and other test conditions.

In general, I notice that if you take any well-executed trad bow, shoot an arrow at 10gpp, at 29"AMO draw length, the speed is in the 185-190 fps range. Standardizing the test conditions like that eliminates a lot of hype over one design vs another.

For a "performance coefficient" of sorts, I have sometimes multiplied the SE/PDF ratio by the dynamic efficiency. A lot of bows that have mediocre SE/PDF have good efficiency, and some that have good SE/PDF have bad efficiency. But it all more or less levels out in the end.

Just my two cents.
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  #14  
Old 12-09-2019, 01:25 PM
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https://shootingtime.com/archery/mom...inetic-energy/

Great description of the math when comparing momentum and kinetic energy in archery.
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  #15  
Old 12-09-2019, 01:48 PM
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Default Re: Arrow Speed

Nice link deepwater .. Thanks
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