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CG ADJUSTMENT
CG adjustment is done by changing the location of the 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 Profi TL the hang point position is adjusted by trim device, repositioning the hang block
along the keel tube.
10 . MAINTE NANCE
This section contains a recommended schedule of periodic maintenance. None of the items in
this section are a substitute for the continual and consistent practice of proper pre-flight
inspections and immediate maintenance of any items on the wing, which require it. Safety
requires that your wing be fully airworthy for every flight. Nuts and bolts must always be secure,
safety rings must always be in place, and damage to any part, which could compromise the
airworthiness of the wing, cannot be tolerated. If you have a question about the need to repair
or replace some part of your wing, feel free to contact your dealer or Aeros directly. It is not
always obvious which item may require attention and which may not. Minor dents or dings in a
non-critical location on the airframe tube may not require any repair or maintenance. On the
other hand, a wire that has been kinked one time can fail very quickly after that, and should be
replaced immediately.
We recommend that you have all maintenance work done by your Aeros dealer.
10.1. WING INSPECTION
The sail should be inspected once every three months or after each 50 flying hours. The frame
should be inspected once a year, after every 100 flying hours, and after every hard landing.
1 0 . 1 .1 . S A IL
4.1.1. Checking the sail surface and seams.
There should be no cuts, ruptures, threadbare holes and torn seams on the sail. Any torn
seams should be re-stitched. Cuts and ruptures on the fairing and bottom surface of the sail
that are not longer than 30 mm can be patched up with self-adhesive Dacron. The Dacron must
be of a weight of not less than 100 g/m. larger cuts and ruptures are to be repaired by stitching
on a reinforcing piece of the same fabric (stitched along the edges). Any rupture shorter than
50 mm can be repaired in this manner, but more complicated repairs and
all cuts near the
trailing edge
should be carried out in the workshop of authorized company.
Keep an eye on the sail grommets/eyelets and all areas of the sail that are subject to extra
stress, especially the keel section, the nose section of leading edge and the outer tip section of
the leading edge.
1 0 . 1 . 2 . C A B LE S YS T E M
The cables which support the wing’s airframe are critical components of the wing’s structure,
and must be maintained in an airworthy condition. It is a general practice in the design of
aircraft structures to design to an ultimate strength of 1.5 times the highest expected load in
normal service.
The wing’s cables, like other structural components on the wing, are typically designed with a
structural safety factor of only about 50% above the expected maximum load. No significant
loss in cable strength can be tolerated.
