Tune for Tens
Page 2
The figure 4 shows a RIGHT TEAR.
The arrow point is to the left and the nock is to the right end of the tear. The shaft is too stiff. If the tear is 1 to 3 inches wide, the shaft can be weakened by increasing the weight in the point or by increasing bow weight. If the tear is greater than 3 inches, the shaft is too stiff to compensate for. Select a weaker shaft.
A tear less than 1 inch, right or left, is okay.
A single hole is ideal.
SECTION 4
HORIZONTAL TEAR
NOTE: the following steps are different for right and left hand archers.
Follow the steps that correspond to the hand you use to pull the bowstring. A poor release will cause the shaft to act stiffer and introduce a larger tear. You should make several shots and get similar results on each shot to insure "true" readings.
FOR Right-Hand Archers
The figure 3 (to the right) shows a LEFT TEAR.
The arrow point is to the RIGHT in the picture and the nock
is to the left end of the tear. The shaft is too weak. If the tear is 1 to 3 inches wide, the shaft can be stiffened by decreasing the weight in the point or decreasing bow strength. If the tear is greater than 3 inches, the shaft is too weak to compensate for. Select a stiffer shaft.
FOR Left-Hand Archers
The figure 3 (to the right) shows a LEFT TEAR. The arrow
point is to the right and the nock end is to the left in the tear.
The shaft is too stiff. If the tear is 1 to 3 inches, the shaft
can be weakened by increasing the weight in the point or by increasing bow weight. If the tear is greater than 3 inches,
the shaft is too stiff to compensate for. Select a weaker shaft.
The figure 4 shows a RIGHT TEAR. The arrow point is to the
left and the nock is to the right end of the tear.The shaft is too weak. If the tear is 1 to 3 inches, the shaft can be stiffened by decreasing the weight in the point or decreasing bow strength. If the tear is greater than 3 inches, the shaft is too weak to compensate for. Select a stiffer shaft.
A tear less than 1 inch, right or left, is okay.
A single hole is ideal.
SECTION 5
PLUNGER TUNING - SPRING TENSION
Plunger Tuning For the Right-hand Archer
First adjust your sight.
The STIFF PLUNGER is in the center of the bow as shown to the right.
Shoot fletched arrows from 18 meters.
Shoot the best group possible in the center of the target.
Adjust the sight if necessary until your grouping is centered on the target.
Remove STIFF PLUNGER and install PLUNGER WITH SPRING to a medium tension setting.
Adjust the PLUNGER until the right edge of the tip of the arrow shaft is in line with the left side of the bow string.
Do not use the right edge of the arrow point but rather the right edge
at the end of the arrow shaft.
Shoot fletched arrows from 18 meters but DO NOT ADJUST
THE SIGHT.
Correct the flight of the arrow by adjusting the tension of the SPRING in the PLUNGER.
Shoot the arrows in the same target and shoot the best group possible.
If the arrows group to the left of the center, weaken the
SPRING (Counter-ClockWise).
If the arrows are to the right of center, stiffen the SPRING (ClockWise).
Adjust the SPRING until the group is in the center of the target.
The group should be the same as the group you shot using
the STIFF PLUNGER/CENTER SHOT METHOD.
For more exact tuning, go to SECTION 6.
Plunger Tuning For the Left Hand Archer
First adjust your sight.
The STIFF PLUNGER is in the center of the bow as shown to the right.
Shoot fletched arrows from 18 meters.
Shoot the best group possible in the center of the target.
Adjust the sight if necessary until your grouping is centered on the target.
For more exact tuning, go to SECTION 6.
Remove STIFF PLUNGER and install PLUNGER WITH SPRING to a medium tension setting.
Adjust the PLUNGER until the left edge of tip of the arrow shaft is in line with the right side of the string.
Do not use the left edge of the point of the arrow but rather use the
left edge of the END of the shaft.
Shoot fletched arrows from 18 meters but DO NOT ADJUST
THE SIGHT.
Correct the flight of the arrow by adjusting the tension of the SPRING
in the PLUNGER.
Shoot the arrows in the same target and shoot the best group possible.
If the arrows group to the right of center, weaken the SPRING (Counter-ClockWise).
If the arrows are to the left of center, stiffen the SPRING (ClockWise).
Adjust the SPRING until the group is in the center of the target.
This group should be the same as the group you shot using
the STIFF PLUNGER/CENTER SHOT METHOD.
SECTION 6:
THE BEGINNING OF FINE TUNING
DROP METHOD - YOU MAY NEED TO REPEAT THIS SECTION MORE THAN ONCE TO ACHIEVE TUNE
Pick a mark near the top of the target matt. Shoot from 10 meters and adjust the sight if necessary.
If you are not sure of your ability to release each arrow uniformly then you should shoot an end of arrows at each distance to create a grouping
each time. You are trying to create a reliable pattern.
Shoot each end then move back 5 meters at a time and continue to shoot at the same mark at the top of
the target. Do not adjust the sight! The arrows should impact lower down the target as you move back. Move back as far as possible without the arrow passing beneath the target matt. This is approximately 40 to 50 meters for most bows.
If the arrows drift to either right or left of center as you move back, more tuning is required.
Go to SECTION 7.
If the arrows fall in a straight line, the tune is good.
Step 8 may not be necessary but read over it anyway.
PATTERN ANALYSIS OF THE FALLING GROUPS
FOR LEFT-HAND
ARCHERS
FOR RIGHT-HAND
ARCHERS
If the arrows fall to
the left side of
center, stiffen the
SPRING (CW) until
the arrows are in
the center line.
If the arrows fall to
the left side of
center, weaken the
SPRING (CCW) until
the arrows are in
the center line.
If the arrows fall to
the right side of
center, weaken the
SPRING (CCW) until
the arrows are in
the center line.
If the arrows fall to
the right side of
center, stiffen the
SPRING (CW) until
the arrows are in
the center line.
NOTE:
Approximately 1/4 turn (90 degrees) of the spring/plunger
will move the arrows 4 inches at 40 meters.
