A
irBorne WindSports
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Fun MANUAL
Issue Date: 1 October 2001 Page 16
Roll/Yaw Trim
Through time and use it is possible that you glider may become “unbalanced”. The glider may turn one way or
roll into a bank easier in one direction than the other. It is possible that the cloth may stretch asymmetrically if
the pilot, over an extended period of time, consistently thermals in one direction. Hard landings or high “G”
loads may also cause abnormal cloth stretch.
There are a couple of methods, which can be used to remedy a turn in your glider. It is important that you
check the points at the beginning of this section before attempting the following adjustments.
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TIP PLUG ADJUSTMENT. The tip plug can be rotated to increase or decrease lift on either wing. To
remove a persistent turn the fast wing should have the tip fitting rotated upward to decrease the lift on
that side. To remedy a right hand turn, for example, rotate the left-hand tip fitting anti-clockwise if
viewed from the rear of the leading edge. The tip fitting should be rotated a maximum of 5 mm from
the standard position. The right side can be rotated anti-clockwise if the turn persists.
The rivet retaining the tip fitting should be drilled out. The fitting should be drilled when adjustment is
made and a new rivet installed.
Ensure that the sail velcro is secure after sail is re tensioned.
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DIFFERENTIAL BUNGIE TENSIONING. The tension can be increased on the tip strut and tip
battens to remove a turn. The increase in tension flattens out the sail, which causes more lift. This
should be attempted on the slow wing. To remedy a right hand turn, for example, the tension should
be increased by re tying the knot in the bungie closer to the sail.
NB
If the glider turns to the right we refer to the right wing as the slow wing.
Summary of Contents for FUN 160
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