GDMANiFUN16-1G
Version 0010
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AIR CREATION
Aérodrome de Lanas - 07200 AUBENAS - France
Tél.: 33 (0) 4 75 93 66 66 - Fax: 33 (0) 4 75 35 04 03 - Internet: www.aircreation.fr
IV)
MAINTENANCE
a)
Adjustments
In General:
Your wing was delivered with the optimum settings.
If you feel that the wing requires adjustment to trim in the roll or the pitch axis you should check that the
problem is not caused by something asymmetrical in the frame or the battens. In order of priority check the
following:
Check that the rotating sleeves at the tips are correctly positioned and blocked by means of the self-
taping screws.
Ensure that the wires, especially the reflex bridles are correctly routed.
Check the battens profile.
Check that the leading edges are straight and that the rear parts are located correctly.
Check that the keel is straight.
After checking as outlined at the beginning of this section an adjustment can be performed by the following
methods:
Never change the length of the reflex lines.
Never alter batten shape except to match the batten profile drawing.
The reflex lines are designed never to be adjusted, and their primary effect is for stability
outside the
normal flight envelope
, so adjustment for flight within the envelope is pointless anyway.
The batten shape is intrinsic to stability, stall behavior and handling. Some aircraft require batten shape
adjustment to correct for turns. This is not necessary for Air Creation wings.
The tuning of a flexwing requires special training and regular practice. We offer hereunder
global effect of the main means of tuning, but their application is delicate. We therefore
recommend that you solicit the expertise of an Air Création Technical Station or the factory
itself if you wish to modify the tuning of your wing!
Hang point position
Centering adjustment is done by moving the hang point on the keel. The locking rings of this part should
be positioned according to the desired centering (3 positions). The cruising speed at natural trim
increased by about 8 km/h (5 mph) if the hang point is moved forward and vice versa. Each position may
be used, the only effect is alteration of the cruising speed once control has been released, without any
repercussions on stability and performance.
For the first flights the hang point should be left in its original position, intended for ease of handling.
Warning: Any alteration of centering means a variation of the A frame tilt and therefore modification of the
lower longitudinal cables’ tension. There are various adjustment holes in the cables fixation rail at the nose
of the wing, so as to allow them to keep a correct tension whichever the adopted position of the hang point
may be. When the position is in the middle, the blocking screws of the tensioning swan catch of the cables
should be in the 2
nd
hole from the back of the rail. The first hole should be used when the position is in
front, and the 3
rd
hole when in rear.
