As a result of Chasin Nocks and his thread on strange looking designs in bows and me mentioning composites vs compound technology thought I would post a few performance figures plucked from an article in Glade magazine a few years ago simply to give people some food for thought in a modern archery world obsessed with speed .
125 # @ 27.875 " 44" flight bow - 1548 gr arrow 171.4 fps
--------------------- ---------------- - 1067 gr arrow 199.4 fps
------------------------------------- 552 gr arrow 254.2 fps
-------------------------------------- 360 gr arrow 299 fps
-------------------------------------- 203 gr arrow 357fps
72 # @ 28 " 44" war bow 1548 gr arrow 131.2 fps
----------------------------- 1067 gr arrow 156.2 fps
----------------------------- 522 gr arrow 213 .2 fps
----------------------------- 360 gr arrow 241.8 fps
----------------------------- 204 gr arrow 286.6 fps
These figures are better represented in the magazine article , perhaps its on there website . Still they were conducted under controled circumstances shooting machine similar weather -all the guff and the bows were only about 6 months old so performance would increase as the sinew dried further .
Not many of us could shoot the 125# bow but imagine turning up at a 3d shoot and scorching a carbon arrow out of the 72 # bow - might be a few compounders eye's open wide and they could shoot a release aid [ thumb ring ] as well . regards Perry
Some perfomance figures on Turkish composites .
Moderator: Moderators
Some perfomance figures on Turkish composites .
"To my deep morticication my father once said to me, 'You care for nothing but shooting, dogs and rat catching, and you will be a disgrace to yourself and all your family.' "
- Charles Darwin
- Charles Darwin
That is really interesting Perry, especially as you see the differences at 552grns = 41 fps, 360grns = 57 fps and 204grns = 71 fps.
I would have expected the trend to be going the opposite way. Considering less energy can be transferred to the lighter arrow, the heavier bow should be losing much more of its efficiency.
Having not seen the article I would expect that although both bows being 44" there would be many more differences between the 2 bows than just poundage?
If I had a work of art like that, I certainly would not be dry firing it with carbon arrows in order to impress compounders
Cheers,
Matt
I would have expected the trend to be going the opposite way. Considering less energy can be transferred to the lighter arrow, the heavier bow should be losing much more of its efficiency.
Having not seen the article I would expect that although both bows being 44" there would be many more differences between the 2 bows than just poundage?
If I had a work of art like that, I certainly would not be dry firing it with carbon arrows in order to impress compounders
Cheers,
Matt
Some efficiency figures for you Matt lifted from the same article .
125# 44 " fliight bow 1548gr arrow - 84.3 %
1067 gr arrow 78.8 %
552 gr arrow 66.1 %
360 gr arrow 60.0 %
203 gr arrow 48.0 %
72 # warbow forgive the typo in the original post it is actually a 49 " bow sorry for the error
1548 gr arrow 90.7 %
1067 gr arrow 88.6 %
522 gr arrow 80.7 %
360 gr arrow 71.6 %
204 gr arrow 57.0 %
Wonder what Dr Ashby would come up with in his penatration study . A cursery glance seems to suggest that lighter bows are somewhat more efficient at transferring energy for a specific weight arrow .
Here's some figures from a 67.4 # 51.5 " target bow included in the same study .
1548 gr arrow 135.2 fps 94 % efficiency
1067 gr arrow 160 .4 fps 91.2 % efficiency
522 gr arrow 214.7 fps 79.9 % efficiency
360 gr arrow 239.8 fps 68.8 % efficiency
204 gr arrow 277.9 fps 52.3 % fps efficiency
125# 44 " fliight bow 1548gr arrow - 84.3 %
1067 gr arrow 78.8 %
552 gr arrow 66.1 %
360 gr arrow 60.0 %
203 gr arrow 48.0 %
72 # warbow forgive the typo in the original post it is actually a 49 " bow sorry for the error
1548 gr arrow 90.7 %
1067 gr arrow 88.6 %
522 gr arrow 80.7 %
360 gr arrow 71.6 %
204 gr arrow 57.0 %
Wonder what Dr Ashby would come up with in his penatration study . A cursery glance seems to suggest that lighter bows are somewhat more efficient at transferring energy for a specific weight arrow .
Here's some figures from a 67.4 # 51.5 " target bow included in the same study .
1548 gr arrow 135.2 fps 94 % efficiency
1067 gr arrow 160 .4 fps 91.2 % efficiency
522 gr arrow 214.7 fps 79.9 % efficiency
360 gr arrow 239.8 fps 68.8 % efficiency
204 gr arrow 277.9 fps 52.3 % fps efficiency
"To my deep morticication my father once said to me, 'You care for nothing but shooting, dogs and rat catching, and you will be a disgrace to yourself and all your family.' "
- Charles Darwin
- Charles Darwin
Hi Perry,
I am a little confused on the 44" and 49". Surely this figure is not the length of the bow.
Daryl.
I am a little confused on the 44" and 49". Surely this figure is not the length of the bow.
Daryl.
"And you must not stick for a groat or twelvepence more than another man would give, if it be a good bow.
For a good bow twice paid for, is better than an ill bow once broken. [Ascham]
“If a cluttered desk is a sign of a cluttered mind, of what, then, is an empty desk a sign?” [Einstein]
I am old enough to make my own decisions....Just not young enough to remember what I decided!....
For a good bow twice paid for, is better than an ill bow once broken. [Ascham]
“If a cluttered desk is a sign of a cluttered mind, of what, then, is an empty desk a sign?” [Einstein]
I am old enough to make my own decisions....Just not young enough to remember what I decided!....
Yep Greybeard thats the length of the bows , amazing stuff those sinew and horn composites .
About 8 years ago the heavier arrow and increased bow efficency penny finally dropped with me when after a couple of frustrating years hunting with my selfbows I was hitting game in the right spot and not getting reliable penatration . I lifted my hunting arrow weight from around 550 grains up to 650 plus by using long tapers on 3/8th shafts to get the required spine , over time I realized the benifits of footing with hardwood , shorter higher fletches and a heavy broadhead
The result of this was a minimum 20 % foc and other arrow design improvements which helped the arrow recover from paradox quicker . I had begun to wake up when playing with my crossbow . I noticed the extremly front heavy bolts flew more accuratly than the lighter foc bolts and penatrated beyond expectation on game due to increased bow efficiency . Now all my arrows are a minimum of 12 grains per pound of draw weight for target work and well over 600 grains for my hunting arrows . Better bow efficency , arrow flight and accuracy .
This is the great thing for me in my traditional archery - rediscovering the secrets that the ancients knew . When ever I am stuck on a solution for any number of archery riddles invariably I find the answer lies hidden in the past . regards Perry
About 8 years ago the heavier arrow and increased bow efficency penny finally dropped with me when after a couple of frustrating years hunting with my selfbows I was hitting game in the right spot and not getting reliable penatration . I lifted my hunting arrow weight from around 550 grains up to 650 plus by using long tapers on 3/8th shafts to get the required spine , over time I realized the benifits of footing with hardwood , shorter higher fletches and a heavy broadhead
The result of this was a minimum 20 % foc and other arrow design improvements which helped the arrow recover from paradox quicker . I had begun to wake up when playing with my crossbow . I noticed the extremly front heavy bolts flew more accuratly than the lighter foc bolts and penatrated beyond expectation on game due to increased bow efficiency . Now all my arrows are a minimum of 12 grains per pound of draw weight for target work and well over 600 grains for my hunting arrows . Better bow efficency , arrow flight and accuracy .
This is the great thing for me in my traditional archery - rediscovering the secrets that the ancients knew . When ever I am stuck on a solution for any number of archery riddles invariably I find the answer lies hidden in the past . regards Perry
"To my deep morticication my father once said to me, 'You care for nothing but shooting, dogs and rat catching, and you will be a disgrace to yourself and all your family.' "
- Charles Darwin
- Charles Darwin