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supply. Never use strong soaps or detergents since soap residue can re-act with ultra violet light and
degrade your fabric and threads. We recommend a very mild liquid soap (washing up liquid) and a soft
sponge. Gently wash the fully rigged wing, frequently hosing clean. Copious amounts of clean water will not
harm the wing and can be very beneficial in removing sand and grit which may get trapped inside the leading
edge pocket usually in the nose or wing tip areas.
rigging/storing in the bag.
Ribs
The ribs form the wing shape and hence dictate the whole performance of the wing. They need treating with
care, and since they are subject to constant tension both during flight and rigging, they tend to lose their
shape and flatten out. It is essential that they are reformed at frequent intervals and checked against the
template. If you have to rig regularly, you should check your rib profiles every 25 hours. If you leave your
GT450 rigged, check the ribs every 50 hours. The best way to reform the rib is to hold the it against your
knee and, whilst applying pressure to bow the rib, slide it side to side over the area you want to bend. Direct
point bending will usually result in either a poor shape or a broken rib. If you kink a rib, do not fly with it; you
should replace it before the next flight.
The bungees on the 5 innermost battens must be tight (10-15kg to pull each of the twin cords out of the
batten end notch) to prevent trailing edge buzz.
Flattening of the camber in the nose and root battens will cause the stall speed to rise.
Sail & Stitching inspection
The Polyester sailcloth is subject to degradation by UV light. Spun ptfe Stitches can be weakened by
abrasion. The Bettsometer test gives a good indication of the capability of the sailcloth to transfer load at a
stitch hole.
The sail should be checked in the root, midspan and tip areas of single thickness main body sailcloth.
Enough tension should be applied to the sailcloth to prevent it puckering at the test needle.
The sailcloth should be tested to 1360 grammes with a 1.2mm needle in the warp direction (spanwise).
Sample stitches can be tested using a 1mm diameter wire hook through the stitch and applying 1360gr.
Failure of the sailcloth or stitches at this load indicates the sail MUST be replaced.
Bolts
Finish:
Not corroded
Wear:
Not above .025mm (.001")
Must not be bent or have damaged threads.
Rigging Cables
No corrosion, broken strands, kinking of cable or thimbles,
Or any sign of movement at a swage.
(Plastic boots must be slid back to inspect swages.)
Any instance of swage movement should be reported to the Factory.
Major airframe tubes
1) Straightness – maximum tolerance Length/600, for leading edge outers, Length/500. Straightness is
measured from the point of maximum bend to a straight line running from each end of the tube. If both tubes
have a perceptible set, leading edge outers should be replaced in pairs. Leading edges must NEVER be
turned round or straightened.
2) No Fretting or corrosion, e.g. between sleeves.
3) No dents deeper than 0.2mm
4) Any scoring up to 0.1mm deep should be blended out, finishing with 1200 grit abrasive paper and coating
in clear laquer.
Hang Bracket and control frame top knuckles
The hang bracket must be inspected for cracks, distortion and wear, particularly at the Hangbolt hole.
Quik & Quik GT450 Maintenance Manual
th
29
March 2007
Issue 1
Ensure the wing is completely dry before de-
WARNING
!
Never use spirits, alcohol, thinners or any strong
detergents when cleaning the sail. These may
damage the cloth or threads, leading to
structural failure of the sail fabric which could
result in injury or death.
Page 38 of 54
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