What is FOC???
01-11-2005 | 06:28 PM
#1
Thread Starter
Joined: Dec 2004
Posts: 20
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From: SE Wisconsin
What is FOC???
What is FOC? What does FOC do? Is a higher number better than a lower number FOC? What is a good FOC? All I know is what it stands for and it's really buggin' me for some reason. [>:]
01-11-2005 | 08:15 PM
#5
Nontypical Buck
Joined: Feb 2003
Posts: 1,161
Likes: 0
From: In Teh Garage (Rossville, GA USA)
RE: What is FOC???
9% is Ideal forward of Center
here is the most accurate way to determine forward of center...
Get a long finishing nail and nail it into a wall just enough to get it snug without falling out. Now with your finished arrow find the balancing point on the arrow and mark that spot on the arrow.
Measure from the throat of the nock to the end of the shaft ( do not measure the point or insert) this is the cut length of your arrow.
Now, divide this measurement by 2 this will give your center of the arrow measurement.
Mark the center of the arrow (from the throat of the nock to the center).
Measure the distance between the balancing point to the center.
Multiply this measurement by 100 then divide that multiple by the arrows cut length.
This will give you your FOC%
here is the most accurate way to determine forward of center...
Get a long finishing nail and nail it into a wall just enough to get it snug without falling out. Now with your finished arrow find the balancing point on the arrow and mark that spot on the arrow.
Measure from the throat of the nock to the end of the shaft ( do not measure the point or insert) this is the cut length of your arrow.
Now, divide this measurement by 2 this will give your center of the arrow measurement.
Mark the center of the arrow (from the throat of the nock to the center).
Measure the distance between the balancing point to the center.
Multiply this measurement by 100 then divide that multiple by the arrows cut length.
This will give you your FOC%
01-12-2005 | 09:17 AM
#9
Joined: Feb 2003
Posts: 162
Likes: 0
From:
RE: What is FOC???
Reading the responses it would appear there is some disagreement on the ideal FOC--ie--9 v. 12. Can someone explain in practical terms how and why a 12 FOC is better than a 9FOC or vice versa? Does the speed the arrow is flying make a difference? My present setup is 10+--I'm contemplating a broadhead change that would change it to a 9. What practical difference does it make? Would I be correct in assuming that the only true test is how broad heads actually fly. Thanks in advance.
01-12-2005 | 10:02 AM
#10
Giant Nontypical
Joined: Feb 2003
Posts: 9,175
Likes: 0
RE: What is FOC???
Well, I don't have a clue where that "9% is optimal" stuff came from. Everything I've ever seen suggests a range from 10-12%.
If you add, "under less than perfect conditions", that's totally, absolutely, 100% correct.
Would I be correct in assuming that the only true test is how broad heads actually fly.