This might be a dumb question, and I think I already know the answer!
08-31-2010, 06:33 AM
#11
Nontypical Buck
Join Date: Mar 2008
Location: Henderson, KY
Posts: 1,760
Btw, i see where the 450fps came from now.
First of all, IBO speeds are set at 70#, 30" draw length, with a 350gr arrow.
If bow A is rated at 330fps, and the archer is shooting a 350gr arrow at 70#, but only with a 27" draw length their calculated speed will drop down to 300fps roughly.
Sorry I forgot to explain where speeds are obtained from.
You can take this info now and apply it to any bow.
There is quite a but more depth in the subject, but this is a good foundation.
First of all, IBO speeds are set at 70#, 30" draw length, with a 350gr arrow.
If bow A is rated at 330fps, and the archer is shooting a 350gr arrow at 70#, but only with a 27" draw length their calculated speed will drop down to 300fps roughly.
Sorry I forgot to explain where speeds are obtained from.
You can take this info now and apply it to any bow.
There is quite a but more depth in the subject, but this is a good foundation.
08-31-2010, 08:58 AM
#14
Nontypical Buck
Join Date: Mar 2008
Location: Henderson, KY
Posts: 1,760
Roughly! Different for different bows and cam efficiencies. It is a dynamic change as well. As arrow weight goes up, dynamic efficiency goes up so it will take more gr to lose 1fps.
Simple, not exactly, but close enough
08-31-2010, 11:26 AM
#16
Spike
Thread Starter
Join Date: Jun 2010
Location: Riverview,Florida
Posts: 54
lol, Sorry guys didn't mean to start something, Well I have a longer draw length.. lol
But What it comes down to it, well what I thought was right,. I just wanted a second notion to what I thought.. But drockw does make since and I do understand..lol Thanks everyone..
But What it comes down to it, well what I thought was right,. I just wanted a second notion to what I thought.. But drockw does make since and I do understand..lol Thanks everyone..
