eddie c
Well-Known Member
If the arrow is shooting stiff you raise the brace height.
If the arrow is shooting weak you lower the brace height.
This is especially true when a bow is already holding the arrow outside of center to start with.
The reason a lower brace height will compensate for a weak arrow is due to the outward (away from the riser) increase of the angle of the arrow.
The reason a higher brace height will compensate for a stiff arrow is it decreases that outward angle.
Bare in mind however, this procedure is only for fine tuning minor stiffness or weakness. The primary spine tuning should be done with arrow changes, and strike plate thickness changes.
The old longer power stroke & faster bow by lowering brace height thing is a wives tale. The only way you are going to increase energy/string speed by lowering the brace height is if the brace height of the bow is above where it's best preload is.
The bottom line is, the arrow is going to shoot the fastest when it leaves the string where the bow places the highest in line stress/preload on the string. Any change up or down from that point, and the string speed, thus the arrow speed will be slower.
Here is a picture illustrating the angle change of the arrow as explained above
If the arrow is shooting weak you lower the brace height.
This is especially true when a bow is already holding the arrow outside of center to start with.
The reason a lower brace height will compensate for a weak arrow is due to the outward (away from the riser) increase of the angle of the arrow.
The reason a higher brace height will compensate for a stiff arrow is it decreases that outward angle.
Bare in mind however, this procedure is only for fine tuning minor stiffness or weakness. The primary spine tuning should be done with arrow changes, and strike plate thickness changes.
The old longer power stroke & faster bow by lowering brace height thing is a wives tale. The only way you are going to increase energy/string speed by lowering the brace height is if the brace height of the bow is above where it's best preload is.
The bottom line is, the arrow is going to shoot the fastest when it leaves the string where the bow places the highest in line stress/preload on the string. Any change up or down from that point, and the string speed, thus the arrow speed will be slower.
Here is a picture illustrating the angle change of the arrow as explained above