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Old 01-03-2015, 07:44 PM
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Chris89lx Chris89lx is offline
 
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Default Can draw weight be calculated?
Are there any draw weight calculators out there?

Here is the info I was able the gather from my Bow Tech Carbon Night.
Draw length is 28.5". Arrows are 400 grain Easton graphite with 100 grain target points.
After about 100 shots with the bow, I tested it out on the chrono last night in the basement.
Average speed from ten shots was 282fps.
Jim Bows said it was set up at about 62-63lbs.

Just curious if there is a calculator that can verify?
Or does it have to be measured?

IBO spec is 330fps. I'm assuming that's at the max 70# and 30.5" draw weight. Arrow weight???
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Old 01-03-2015, 07:50 PM
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Do you have an Iphone. Cool App

https://www.youtube.com/watch?v=LfnQ884zFlM
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Old 01-03-2015, 07:59 PM
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Chris89lx Chris89lx is offline
 
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Originally Posted by pacs5 View Post
Do you have an Iphone. Cool App

https://www.youtube.com/watch?v=LfnQ884zFlM

That is pretty cool. But I already know the speed. I'm looking for draw weight.
Might have to try it though.
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“My rifle … this is my rifle. There are many like it, but this one is mine. My rifle is my friend … I must master it as I must master my life. My rifle without me is useless … I will learn its strengths and weaknesses, its parts, its accessories, its sights, and its barrel. I will keep it clean and ready, we will become part of each other … before God, I swear this creed.” General William H. Rupertus
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Old 01-03-2015, 08:07 PM
Scottmisfits Scottmisfits is offline
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I don't know if it help you but I found a scale at Wholesale a couple of years ago. It was $15-20. I've used it quite a bit with the sons and the wife's bow.
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Old 01-03-2015, 08:12 PM
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Quote:
Originally Posted by Chris89lx View Post
That is pretty cool. But I already know the speed. I'm looking for draw weight.
Might have to try it though.
a fish scale from Canadian tire. buy three, take the average weight (cos they will all be different) and then take them back and complain they were all different.
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Old 01-03-2015, 08:41 PM
NBFK NBFK is offline
 
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Check out the back country calculator it's pretty close usually. Ibo is 30" draw 70lbs draw weight and 350grain arrow. The carbon knight is 335 fps at the ibo standard.
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Old 01-03-2015, 09:37 PM
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Chris89lx Chris89lx is offline
 
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Originally Posted by NBFK View Post
Check out the back country calculator it's pretty close usually. Ibo is 30" draw 70lbs draw weight and 350grain arrow. The carbon knight is 335 fps at the ibo standard.
That calculator looks to be accurate with the information I have.
283fps works out to 62lbs.

Thanks.
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“My rifle … this is my rifle. There are many like it, but this one is mine. My rifle is my friend … I must master it as I must master my life. My rifle without me is useless … I will learn its strengths and weaknesses, its parts, its accessories, its sights, and its barrel. I will keep it clean and ready, we will become part of each other … before God, I swear this creed.” General William H. Rupertus
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Old 01-05-2015, 01:10 PM
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L.O.S.T.Arrow L.O.S.T.Arrow is offline
 
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Caculating Draw weight is iffy at best...most knowledgeable shooters could guess by drawing bow near as close...
Best is a bow scale...

I have a weigh scale that does over 100 lbs and i have a weight to calibrate it every once in a while...

Electronic or digital bow scales are surprizingly accurate..most Pro shops can get them for you...
Easton has a great one for around the $150.00 marks [most accurate]
Allan products has one for under $20.00 as does Cabelas...

Neil
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