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9. WING TUNING
Properly tuned, the wing is safe, comfortable and fun to fly. The wing has been tested and tuned
by the manufacture or your dealer. However, in case you have enough experience, you may
tune the wing by yourself, as written below, if necessary. There are a number of adjustments
that affect the flight characteristics.
WARNING
DO NOT PERFORM MORE THAN ONE ADJUSTMENT AT ONCE. IF YOU DO NOT HAVE ENOUGH
EXPERIENCE TO TEST FLY THE WING, ASK MORE EXPERIENCED PILOT TO DO IT FOR YOU. IT
SHOULD BE PERFORMED IN SMOOTN AIR AND WITH CAUTION.
BATTENS
The battens will need to be compared and adjusted to match the batten profile template at
regular intervals. Small variations in batten camber (± 10 mm at the trailing edge) will not have
significant effect on flight characteristics.
BATTEN TENSION
With some airtime on the wing the battens tension may get too loose, this may cause the trailing
edge to flatter. If the battens tensioned too much, the handling will become harder. Make sure
the battens tensioned on both wings identical.
All battens on the Still TL are tensioned by ropes and elastics.
To check batten tension measure the distance from the batten end saddle to the knot when
pulling the rope (elastic). This distance should be 1 cm for rope and 3cm for elastic.
To change batten tension undo the knot, change the rope (elastic) length and tight the knot
again.
TURN CORRECTION
Figure 38
There is a self-tapping screw for the turn
adjustment at the outer part of the leading
edge # 3 (Fig. 38)
By adjusting a wingtip down, the lift on the
end of that wing will be increased and that will
lift that wing in flight. Adjust the self-tapping
screw up by 2.5 mm at a time.
By adjusting the wingtip up, the lift will be
decreased on that side and the wing will drop
on that side. Adjust the self-taping screw
down by 2.5 mm at a time.
Adjust one wingtip at a time and test fly after
each adjustment.
CG ADJUSTMENT
CG adjustment is done by changing the location of your hang point along the keel. The farther
forward your hang point is, the faster the wing will trim, the less effort will be required to fly fast,
and the more effort will be required to fly slow.
On the Still TL, the hang point position is adjusted by repositioning the hang block along the
keel tube.
