James Park
30-08-2002, 08:37 PM
If you twist the bow counter-clockwise (as seen from above), the arrow will go to the left of centre.
However, with the sight out in front of the bow, twisting the bow counter-clockwise will move the sight pin to the left, and hence when you centre it on the target the bow will be aimed to the right.
So, we have two effects working in the opposite direction and it is posible they could be made to cancel. That is: if the sight extension is the correct length, the amount you aim off to the right can exactly cancel out the effect of the bow torque.
With my sight extension all the way in, I can then shoot a shot with no torque applied to the bow and get a 10 on the indoor range. When I then twist the bow counter-clockwise considerably I can miss the target altogether to the left. Then, with my sight extension about 22cm out in front of the bow I can get the "torqued arrow" in the 10 ring together with the "untorqued arrow". That is, with that sight extension the cancelation is exact.
The beauty is that once I have done this on the indoor range I can then go to 90M, shoot one without torque into the 10 ring, twist the bow a large amount for the next shot and also get it in the 10 ring. That is: once you have cancelled out the torque for one distance it is fixed for them all.
If you have the sight extension too far out it over-corrects. So, you need to experiement a little to find the extension that is best for you.
Just one thing you need to be aware of in doing the testing (no, two things actually):
1. Do not twist the bow so much that the string comes off - very ugly!
2. If you are using a shoot through rest you may find that when you twist the bow you get fletch contact with the launcher and this can give you false results.
Try it out - it really works!!! Never again will you lose points through twisting the bow.
I do have some very good pictures of this in my book "Mastering Compound Bows", available through Marcus.
However, with the sight out in front of the bow, twisting the bow counter-clockwise will move the sight pin to the left, and hence when you centre it on the target the bow will be aimed to the right.
So, we have two effects working in the opposite direction and it is posible they could be made to cancel. That is: if the sight extension is the correct length, the amount you aim off to the right can exactly cancel out the effect of the bow torque.
With my sight extension all the way in, I can then shoot a shot with no torque applied to the bow and get a 10 on the indoor range. When I then twist the bow counter-clockwise considerably I can miss the target altogether to the left. Then, with my sight extension about 22cm out in front of the bow I can get the "torqued arrow" in the 10 ring together with the "untorqued arrow". That is, with that sight extension the cancelation is exact.
The beauty is that once I have done this on the indoor range I can then go to 90M, shoot one without torque into the 10 ring, twist the bow a large amount for the next shot and also get it in the 10 ring. That is: once you have cancelled out the torque for one distance it is fixed for them all.
If you have the sight extension too far out it over-corrects. So, you need to experiement a little to find the extension that is best for you.
Just one thing you need to be aware of in doing the testing (no, two things actually):
1. Do not twist the bow so much that the string comes off - very ugly!
2. If you are using a shoot through rest you may find that when you twist the bow you get fletch contact with the launcher and this can give you false results.
Try it out - it really works!!! Never again will you lose points through twisting the bow.
I do have some very good pictures of this in my book "Mastering Compound Bows", available through Marcus.