How to test poundage

[proprod]

I saw an intereting comment about how a bow was marked would probably be correct poundage with fingers vs. being pulled on a test stand with a hook.

From applied physices I can understand a bow being pulled with fingers will require more poundage because the applied load is over a greater surface area than a single pint hook.

However, I am curious what the standard is? And is it applied consistently?

[Piratkey]

The standart is the measure with a simple hook but some bowers (like Kirk Lavender at Bigfoot bows) use a "hook" who imitate the fingers.
I think the Kirk methode is lot more accurate,
If a have a short bow,long draw lenght and big hands, the difference can be around 5/6 pounds,it's alot .  

[Prairie Drifter]

So which would weigh more, fingers or the single hook?

[Piratkey]

Fingers  

[NBK]

Never knew that.  Ya learn something every day.

[pdk25]

Can't imagine it amounts to more than a pound or so for difference for most folks.

[Sixby]

With the bow I am building right now I figure I have two more lbs to play with compared to the hook. so I am pulling 62 lb. and I want to hit 62 lbs. I know I can fine sand the bow losing 2 lbs and still be 62 lb when I pull it with fingers.
 Bows vary but that is what I have with this one.
Damon Howatts and Martins were notorious for being 4 too 5 lbs heavier pull than what they wrote on the bow. I suspect that they used a hook and did not compensate. If the scale happens to be a bit heavy then it may be even more.
God bless, Steve

[Piratkey]

Originally posted by pdk25:
Can't imagine it amounts to more than a pound or so for difference for most folks.

Yes,it's true,usually the difference is around 2 pounds but in some cases it's more,this is depend the bows geometry,the draw lenght,the bow lenght,etc....

[proprod]

Thanks, Good feedback any idea on how that is calculated into the dynamic spine calculator?

[Piratkey]

It's not calculated by the spine calculator and you have to add yourself 2# on the draw weight case,if you want to be more accurate to know you exact draw weight, you can built a "hook " who imitate the fingers and chek the bow weight with.