Bow Speed

[HARL]

62" Zipper Nitro 63@28 I draw to 29 750 gr arrow 191-193 checked on 2 differant chrono's.

[joe ashton]

fun thread... lets see some more.

[fujimo]

my 64" 'Kenny M' R/D longbow @ 50# with 10.6 gn per #- 170- 171 fps- no tip wedges or powerlam- maybe next time!

[dougbutt]

I don't have chrono, but  my bigfoot ss 57@27.5 was sent through the chrono by Kirk before shipping it to me.  It came in at 194 fps at 10 grains per inch.

[dougbutt]

Whoops double post,  yes I meant 10 grains per pound not inch

[roy easom]

I chronoed my Border Covert Hunter stats as follow

55#@28" I draw 29.5
440GR. arrow


3 shots
215,215,216 FPS

d97 endless loop string built by me. picture is in the link below

  web page

The problem with a lot of bow tests for me is that I do not have the draw length that the bows are tested at. Not all bows function the same, comparatively, at my less 27" draw. While a Hooter shooter will produce a standard, I am not a Hooter shooter, so what any bow does for me is what counts for my shooting. Using a chrono when comparing bows at anyone's individual stats is a valuable thing in it's own right, I have been thinking that I should have one, but I do not know what would be a good one for the money.

[halfseminole]

I draw so long that nobody wants me to post my scores, the one time I did have it.

[newhouse114]

My old Martin recurve at 8.6 gr/lb would do 212 fps and at 10 gr/lb was 187 fps.

[LBR]

A Hooter Shooter makes and apples-to-apples comparison.  A particular bow can vary in speed a LOT from one shooter to another just due to differences in release.

For an honest comparison you need a Hooter Shooter, arrows spined for the bow, a calibrated chronograph, someone who knows how to use it properly and is familiar with AMO/ATA specs, etc.

Even different light conditions can affect readings.

[monterey]

Pavan, I have had a Chrony for over 20 years and it works fine with bullets and arrows.

You guys prompted me to fetch my notes and record some data from last year.

All these bow weights are based on actual scale just prior to running them over the chrono.  The two arrows were the same for all bows.  Heavy arrows for these bows, but I look for comparisons based on arrow speed minus bow weight + 100.

I measure from the back of the bow, so not a match to AMO. (this is a major flaw in my system.  I should go with AMO since it will repeat the actual length of the arrow drawn )

68" NTN flat ASL, My build
46# @28"
520 gr arrow at 164 fps 650 gr arrow at 156 fps

Vintage Howatt Cavalier Static Recurve
44# @28"
520 gr arrow at 170 fps 650 gr arrow at 162 fps

68" NTN 1/4" string follow ASL, my build
34# @ 28"
520 gr Arrow at 149 fps 650 gr arrow at 144 fps

Vintage Shakespeare Super Necedah
28# @28"
520 gr arrow at 153 fps  650 gr arrow at 146 fps

68" NTN ASL 3/4" reflex at tips, my build
35# @28"
520 gr arrow at 165 fps 650 gr arrow at 157 fps

Chad, I was not considering it for comparing bows. I was thinking that one would be good for checking myself. As in what one of my longbows does with my new small looped Champion string versus my old B50 with different arrows or slight form changes. While I am not so concerned what speed one bow shoots over another, I am curious about how arrow differences, or strings, or silencers, or nocks can affect my shot; but mostly how repeatable my own shot can be with the same bow.  When I had a chance to use one for an hour, it told me quite a lot about me, I tend to have more varied things going on than I like at times. I have in the past tested myself at point on range and my bow and arrow differences at shooting for average distances, a chrono would be a good back yard tool.

[LBR]

IMO what you are talking about is the best use for a personal chrono.  You can compare your personal equipment, check the consistency of your release, etc.

With my other post I meant for marketing purposes.  One guy checks a particular bow and gets X fps, the next might get Y fps.  Unless a standard is followed, it won't be reliable for advertising purposes.

[Pine]

This has reminded me of a time back in the early 80s , we had a crono that was the type that you had to enter the length of the arrow before you shot threw it .
I took my 60# K-Mag and shot a lady's 27" 1816 with a 100gr point , the reading was 302fps.
I don't think that was accurate , because I think the arrow went threw it sideways .

They had one of those at a shoot near Sioux Falls way back when. Our arrows shot really fast according to the machine. For some reason, only known by the machine, my bow shot blunts faster and more consistent then than field points, even though the guy measured both arrows.  I would not want a chrono reading that put out more questions than it answered. I think the one that I got speeds of 172 to 176 was accurate, but that one costs hundreds of dollars more than what I can justify for personal testing.

[dougbutt]

Whoops double post,  yes I meant 10 grains per pound not inch

[**DONOTDELETE**]

Originally posted by LBR:
Where did all those 200+ fps with 10 gpp@28"  shot with fingers go?    :D      :p      :rolleyes:        

Here's one....



Below is a link to the review.

http://www.tradarcher.com/BigFootReview/bigfoot_review.html

[TDHunter]

ACS 2pc longbow 54@29.5   64"
31" Beaman Camo Hunter with 175grn tip total: 525grns
188-190 fps

[hobgoblin]

Roy, you got impressive results from your C/H, but alarm bells are ringing.

From your figures you should have about 58lb on your fingers at full draw and according to Borders minimum arrow weight chart for this bow yours should be at least 468gn, this works out at 8.06gpi, where as your 440gn arrow comes in at 7.58gpi.

The C/H is designed as a hunting bow and enables you to throw a much heavier arrow at a speed equal to that achieved by a heavier bow.

It also states that using arrows below the recommended minimum weight will reduce the life of your bow.

I have 53lb on my fingers at full draw, my arrows weight in at 545gn, that works out at 10.2gpi. I have not shot mine through a chronograph but get excellent speed. My reason for purchasing a C/H was so that when I get to hunt next, swapping my field piles for broadheads makes no difference to how I aim or shoot the bow at my effective range with a small increase up front of 10gn making a total arrow weight of 555gn.

I feel compelled to say something Roy to arm you with knowledge that could prevent you wrecking your bow in the future.

Attached is picture of mine, hope I've copied and posted it right !

Hobgoblin    
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[Yewbender]

Don't know, i dont have a chrono and i know they are not going to break any speed records. I shoot 52-58# ASL's, 27" draw with B50 strings. Target arrows are 600gr. POC And my hunting arrows POC 660gr and Leopard wood are 780gr. Im sure they are well under 160fps but they hit a target like a frieght train!