Draw weight

[Don Case]

Is draw weight linear? If I have a bow that is 10# at 12" draw will it be 20# at 24" draw?
Thanks
Don

[PEARL DRUMS]

2-3# per inch is normal. 10# @ 12" would be darn close to 40# @ 24".

[Joec123able]

2-3# per inch is normal. 10# @ 12" would be darn close to 40# @ 24".

So what about a bow that pulls say 27 pounds at 28 inchs ?

[PEARL DRUMS]

Its a spongey piece of junk.

[Brian Hoffer]

Google search for "traditional bow fd curve images" and take a look.  Within the working range of the bow, it is relatively linear - but not 1:1 as in your example.  However, there is a point when the bow begins to "stack" - where the angle of the string is > 90 degrees at the nocks and therefore you begin pulling more force along length of the limb rather then bending it.  At this point the FD curve becomes asymptotic.

[Don Case]

Thanks, that's what I was looking for.
Don

[Blaflair2]

Damn pearl, that actually made me laugh outloud

[adb]

I find heavier bows (above 60-70#) usually gain 5# per inch. Below that, the usual normal is about 3# per inch.

[twisted hickory]

Its a spongey piece of junk.

ROFlOl!
Been there done that. Got one hanging over my wood stove right now....Gonna use it to start a fire this fall.

[Joec123able]

Its a spongey piece of junk.

Sure but the 2-3 pound is more of an average not every bow is the same 2-3 pounds an inch

[twisted hickory]

Its a spongey piece of junk.

Sure but the 2-3 pound is more of an average not every bow is the same 2-3 pounds an inch

I have only made 12 bows so far and as an average it is 2-3 lbs per inch. If it's less than that or more something is wrong with tiller/design. towards the end of draw length/weight it may gain like 3.5 lbs per inch on the last inch. This is also called stack. how much  a bow gains poundage depends on how much wood there is and where it is at on the limb as well as lenght of bow and lenght of draw. Lots of variables here to account for. Generally speaking ya want 2-3 lbs per inch.
Hope this limited knowledge helps.
Greg

[Joec123able]

Its a spongey piece of junk.

Sure but the 2-3 pound is more of an average not every bow is the same 2-3 pounds an inch

I have only made 12 bows so far and as an average it is 2-3 lbs per inch. If it's less than that or more something is wrong with tiller/design. towards the end of draw length/weight it may gain like 3.5 lbs per inch on the last inch. This is also called stack. how much  a bow gains poundage depends on how much wood there is and where it is at on the limb as well as lenght of bow and lenght of draw. Lots of variables here to account for. Generally speaking ya want 2-3 lbs per inch.
Hope this limited knowledge helps.
Greg

I really don't want to argue about it but I disagree your saying tht a 120 pound warbow is still only gonna pull 2-3 pounds an inch ? And that a 20 pound bow is gonna pull 2-3 pounds an inch ? I don't think so. And saying that if it doesn't pull 2-3 pounds per inch then it is the wrong design/tiller is just silly

[lostarrow]

Didn't we just have this discussion a couple of months ago? ....................................At brace height(6" for ex.)it's 0 lbs.   The gain will depend on final draw weight and length drawn.   
    60#@ 28" means you are pulling 60lbs over a 22" distance (28"-6" brace)  Therefore  2.7272 lbs per inch
    120 #@32" means you are pulling 120lbs over a power stroke of 26"    Therefore 4.6153 lbs per inch
   For practical purposes (hunting bows of 45 -65lbs) we are talking 2-3 lbs./ inch .
 If you were to get a dramatic increase in draw  near it's limit, it's a design flaw (stacking)
     Disclaimer :The discussion may have been on another site

[adb]

Yup... we just hashed this out about a month ago.

[mikekeswick]

Just use some common sense guys. It depends on a few things but non of them rocket science