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Main Boards => PowWow => Topic started by: Legolas on June 05, 2008, 12:26:00 PM

Title: Chrono speeds for bows
Post by: Legolas on June 05, 2008, 12:26:00 PM
Anyone put together a list of popular bows and the fps for equal poundage and arrow wt?

thanks
Paul
Title: Re: Chrono speeds for bows
Post by: James Wrenn on June 05, 2008, 04:33:00 PM
Here is a page of some bows Blacky tested.

http://www.blackysarchery.com/speed-results.htm
Title: Re: Chrono speeds for bows
Post by: pseman on June 05, 2008, 05:02:00 PM
Not a lot of difference in all of the bows on Blacky's list. The difference between the fastest and slowest is only 10-12fps. I wish there had been a few "cheap" bows in there for comparison.
Title: Re: Chrono speeds for bows
Post by: Legolas on June 05, 2008, 08:56:00 PM
I have seen this list years ago. I wish we had more research and develop. in our sport.
I would love to see Centaur, Moab, Quest, ACS, DASS, and the like.

Paul
Title: Re: Chrono speeds for bows
Post by: suttoman on June 05, 2008, 09:30:00 PM
Yes I agree with you Legolas.  Would be great if there was a database of the popular bows available - with their performance ratings, % efficiency, draw curve etc.

Sutto
Title: Re: Chrono speeds for bows
Post by: axehind on June 05, 2008, 09:41:00 PM
I'd like to see some warf bows up there too.    ;)  

I am surprised about how little of a difference there is. Some of those bows are advertised as being a fast bow, but there is little difference in there speeds compared to other bows.
Title: Re: Chrono speeds for bows
Post by: R H Clark on June 05, 2008, 11:31:00 PM
In the trad world 10fps is big.

There is not a lot of difference in top bows set up the same with equal gpp.

The thing about Warfs and metal risers is you can safely shoot lower gpp.If you can pull heavier poundage you can get hunting weight arrows very fast.
Title: Re: Chrono speeds for bows
Post by: Davie C. on June 05, 2008, 11:37:00 PM
I wonder how many fps per inch I get drawing all the way to 31"   :D
Title: Re: Chrono speeds for bows
Post by: sagebrush on June 06, 2008, 01:15:00 AM
I chrono'ed my Acs Cx. It is 50lbs. at 30 inches. 64" model. I was shooting wood arrows, 620 grains @170 fps. Gary
Title: Re: Chrono speeds for bows
Post by: sagebrush on June 06, 2008, 01:51:00 AM
But the parts I like the best are the light carry weight and the quietness of the bow. Gary
Title: Re: Chrono speeds for bows
Post by: longbowben on June 06, 2008, 03:00:00 AM
I do not think speed kills, pin point aming does .
Title: Re: Chrono speeds for bows
Post by: axehind on June 06, 2008, 03:07:00 AM
QuoteOriginally posted by longbowben:
I do not think speed kills, pin point aming does .
I think you need both to kill.
Title: Re: Chrono speeds for bows
Post by: longstiks on June 06, 2008, 04:09:00 AM
I put my Ancient Spirits Mountain Ash 60# @ 31" thru a chrono the other day and was happy with my 155FPS shooting 33" maple shafts @ 840 gr. and 680gr chundoo arrows @ 175 fps. Not blinding fast but both hit with authority  :) .
Denny
Title: Re: Chrono speeds for bows
Post by: NDTerminator on June 06, 2008, 10:14:00 AM
Don't know if this helps, but I posted this on another thread...

IMO shooting 10GPP,175-185 is average, 185-190 is fast, 190+ is damn fast...

My fastest recurve is a 58" 52#@28" Lee TD Hunter. Shooting 525 grain CX Terminator Hunters drawn to 28.5"(10GPP), this bow chronographs 190FPS...

My next fastest bow, a 60" CM H2 53#@28", using the same arrow (9.9GPP), chronographs 187FPS...
Title: Re: Chrono speeds for bows
Post by: Rob DiStefano on June 07, 2008, 04:03:00 PM
IMO, since all bows are individually crafted of mostly organic materials (wood), there are inherent unique qualities that will set even same model bows apart ... as well as bow design.  

Add to that how the speed testing is accomplished (man versus machine), the type and accuracy of the chrono device, the qualities of the projectile (arrow) and transmission (bowstring), and maybe even test location (relative to sea level) and weather (air temp and humidity).

I've done lots of chrono testing, and it was kinda fun.  But in the final analysis, without doing any speed testing, I KNOW what trad tackle will work for which specific tasks ... just by shooting the bows with different weight/spine/build arrows and at different distances.

YMMV.
Title: Re: Chrono speeds for bows
Post by: Jason R. Wesbrock on June 07, 2008, 05:21:00 PM
QuoteOriginally posted by axehind:
I'd like to see some warf bows up there too.     ;)    
I have a Black Bear Warf with medium SF glass/foam limbs set at 60# @ 32". It shoots 400-grain arrows 212 fps.
Title: Re: Chrono speeds for bows
Post by: Rob DiStefano on June 07, 2008, 05:49:00 PM
QuoteOriginally posted by Jason R. Wesbrock:
 
QuoteOriginally posted by axehind:
I'd like to see some warf bows up there too.      ;)    
I have a Black Bear Warf with medium SF glass/foam limbs set at 60# @ 32". It shoots 400-grain arrows 212 fps. [/b]
Dang, at 6.67 GPP I'd think something's gonna give out sooner than later!    :eek:
Title: Re: Chrono speeds for bows
Post by: Jason R. Wesbrock on June 07, 2008, 06:46:00 PM
QuoteOriginally posted by Rob DiStefano:
 
QuoteOriginally posted by Jason R. Wesbrock:
 
QuoteOriginally posted by axehind:
I'd like to see some warf bows up there too.       ;)      
I have a Black Bear Warf with medium SF glass/foam limbs set at 60# @ 32". It shoots 400-grain arrows 212 fps. [/b]
Dang, at 6.67 GPP I'd think something's gonna give out sooner than later!     :eek:  [/b]
I've shot lighter.   ;)
Title: Re: Chrono speeds for bows
Post by: Rob DiStefano on June 07, 2008, 09:50:00 PM
QuoteOriginally posted by Jason R. Wesbrock:
 
QuoteOriginally posted by Rob DiStefano:
 
QuoteOriginally posted by Jason R. Wesbrock:
   
quote:
Originally posted by axehind:
I'd like to see some warf bows up there too.        ;)      
I have a Black Bear Warf with medium SF glass/foam limbs set at 60# @ 32". It shoots 400-grain arrows 212 fps. [/b]
Dang, at 6.67 GPP I'd think something's gonna give out sooner than later!      :eek:   [/b]
I've shot lighter.    ;)  
Then yer a way better man than me - or just very lucky!     :saywhat:      :wavey:
Title: Re: Chrono speeds for bows
Post by: John Havard on June 08, 2008, 09:31:00 AM
Just about the only way to shoot lighter than that is to dry fire your bow!!
Title: Re: Chrono speeds for bows
Post by: MCS on June 08, 2008, 11:09:00 AM
How far do you stand from crono when testing. Thanks Mike.
Title: Re: Chrono speeds for bows
Post by: Jason R. Wesbrock on June 08, 2008, 12:53:00 PM
QuoteOriginally posted by John Havard:
Just about the only way to shoot lighter than that is to dry fire your bow!!
I've done that too (on accident, of course).   :D  

Seriously though, some bows can handle it, others can't. I wouldn't shoot that light with a wood bow, but with a strong aluminum riser and FITA limbs I wouldn't hesitate. I figure if FITA shooters can run tens of thousands of arrows that light, it's not a big deal.
Title: Re: Chrono speeds for bows
Post by: R H Clark on June 08, 2008, 09:01:00 PM
I have heard of FITA archers shooting 5gpp for 100,000 plus shots.I haven't personaly seen it but have read it from different sites.

6gpp is the safe limit DAS put on his bows so 6.67 should be no problem.

I shoot 6.5 from my DAS Elite for targets and without silencers it shoots 218 fps.I use 4 silencers because I don't like to scare the other trad guys I shoot with, and get 208 fps.

I would not reccomend you shoot that light an arrow in a bow not designed for it.Nor do I hunt with that light of an arrow.
Title: Re: Chrono speeds for bows
Post by: Jason R. Wesbrock on June 08, 2008, 09:16:00 PM
QuoteOriginally posted by MCS:
How far do you stand from crono when testing. Thanks Mike.
Usually about 5 or 6 feet. I've thought a time or two about shooting throug a chrono at 20 yards just to see how much speed is lost at that distance, but knowing my luck that'd be a rather expensive shot.
Title: Re: Chrono speeds for bows
Post by: overbo on June 08, 2008, 09:29:00 PM
I had a Habu recurve that was 61lbs@26'',my draw legnth that shot a 400gr arro @207fps w/ silencers and a 16 strand 97 string.Shot a 525gr arro in the high 180's
Title: Re: Chrono speeds for bows
Post by: Jason R. Wesbrock on June 08, 2008, 10:11:00 PM
As far as longbows go, my 64: Thunderstick MOAB shoots 210 fps at 8 gpp.
Title: Re: Chrono speeds for bows
Post by: Danny Roberts on June 08, 2008, 10:31:00 PM
Not to slam anyone but I thought the FPS and the techno. items were not in a trad. guys' interest but good luck with your research.
Title: Re: Chrono speeds for bows
Post by: Joseph on June 09, 2008, 03:03:00 AM
If I am remembering correctly when I got my last bow from Dick Robertson I put it in his shooting machine that he had set up just to see what it would do.  It is 64# @ 29 inches and shot a 720 grain arrow 186 fps and a 500 grain arrow 220 fps.  That shooting machine had a release on it so I imagine that with a finger release it would be about 5 fps slower give or take.  I was happy   :thumbsup:  It kills stuff good!  Joseph
Title: Re: Chrono speeds for bows
Post by: MCS on June 09, 2008, 05:12:00 AM
Thanks Jason.
Title: Re: Chrono speeds for bows
Post by: Legolas on June 09, 2008, 02:27:00 PM
It all seems antedotal. We need an independent study don't we?
paul
Title: Re: Chrono speeds for bows
Post by: O.L. Adcock on June 09, 2008, 06:19:00 PM
Pseman, "Not a lot of difference in all of the bows on Blacky's list. The difference between the fastest and slowest is only 10-12fps. I wish there had been a few "cheap" bows in there for comparison.

There's 20+fps difference between the best recurve and worse longbow. For every 2 fps difference between bows under those conditions, the "poorer" bow will need 1 pound more draw force to match the other. 10 fps is a 50# bow shooting the same arrow as hard as a 55#. FPS and draw weight have direct parallels. If it didn't we could hunt elephants with 20 pound bows.

Same thing Danny, Do you want to get 40# performance out of your 60# bow? I doubt it....O.L.
Title: Re: Chrono speeds for bows
Post by: StanM on June 09, 2008, 06:49:00 PM
QuoteOriginally posted by Jason R. Wesbrock:
 
QuoteOriginally posted by MCS:
How far do you stand from crono when testing. Thanks Mike.
Usually about 5 or 6 feet. I've thought a time or two about shooting throug a chrono at 20 yards just to see how much speed is lost at that distance, but knowing my luck that'd be a rather expensive shot. [/b]
Hey Jason,

I've built a two-ply "shield" for my chrono out of 3/4" plywood for just that reason.  Very interesting to get speeds at 10, 20, 30 etc. yards.  I use blunts for chrono reads anyway, because they are supposed to be the most accurate for measuring speeds.

Stan
Title: Re: Chrono speeds for bows
Post by: John Krause on June 09, 2008, 07:49:00 PM
Jason,

I can't believe that Black Bear Warf isn't shooting faster than that. Damn! 60 @32 with a 400 grain arrow!
Title: Re: Chrono speeds for bows
Post by: Jason R. Wesbrock on June 09, 2008, 08:03:00 PM
John,

I was a little surprised too. With better limbs it'd pick up a few fps, but I'm content. Besides, the last time I owned a recurve that forgiving it was a Hoyt Avalon target rig, so that really says a lot for Bob's workmanship.
Title: Re: Chrono speeds for bows
Post by: axehind on June 09, 2008, 08:06:00 PM
QuoteJason,

I can't believe that Black Bear Warf isn't shooting faster than that. Damn! 60 @32 with a 400 grain arrow!
I believe Bob G is shooting in the 220's with his. I dont remember his arrow weight, I think it was in the 300's. The draw weight was in the 40's.

**Disclaimer: This is all from memory**
Title: Re: Chrono speeds for bows
Post by: Legolas on June 09, 2008, 09:08:00 PM
this is from the Morrison Website on the new ILF
LONGBOW:

"Chrono Tests on Longbow limbs:

48# @ 28" 432 grain arrow

191.6 fps average 6 shots"

That is impressive!

Paul
Title: Re: Chrono speeds for bows
Post by: HATCHCHASER on June 09, 2008, 10:14:00 PM
From the Black Swan website...

6 grains per pound 270 grain arrow..242 fps
9 grains per pound 405 grain arrow..211 fps
12 grains per pound 540 grain arrow..182 fps

Bow was drawn to 45lbs. @ 30".  Now that is fast.