P&M QUIK-GTR Manual, ref. QUIK-GTR Man 1.0.doc
Page 68
11.3.4 Hang Point Adjustment
Fast trim setting:
The GTR wing must be tuned to be stable in pitch even with the trimmer fully fast. From the fast trim speed, an
increasing pull force must be necessary to increase speed and an increasing push force necessary to reduce
speed. When the speed is displaced by 5mph from trim, the aircraft should re-trim within 2-3mph of the original
trim speed. In a dive to Vne 120mph, the aircraft must pull out upon relaxing of the bar force. The most critical
condition is with a brand new wing at minimum weight (i.e. minimum washout condition).
Fast trim too fast:
If the fast trim speed is too fast and pitch feel too light, both the tips can be rotated both upwards by up to 3
divisions above the standard factory setting, until the correct trim speed is achieved. Again, use small
adjustments to achieve the desired result. If the wing is very new (less than 5hrs) then it will probably settle down
by 4-5mph over the next 20hrs.
If the trim speed is still too fast, the profile of the battens should be checked. The nose ribs should never be
modified from the plan. The plan shows 2 profiles for ribs 7-10, issue A is a flat profile designed to give a slow
trim speed and is used for new production.
Fast trim too slow:
If the wing has slowed unacceptably with the trimmer fully slack, the tip adjusters can be rotated both together in
1 division increments on the scale so as to bias the trailing edges downwards. Check the result at each 1mm
adjustment until the trim speed and pitch feel are correct. Do not exceed the adjustment shown on the scale,
measured against the bottom edge of the screw. If the trim speed is still too low, the ribs 7-10 may be re-
cambered to the issue B profile on the plan, see the rib drawing above. Finally, the leading edges should be
removed and checked for straightness to a tolerance of L/600.
The settling of the sail on the airframe generally tends to slow the wing down and make it more stable both in
pitch and laterally/directionally, as the washout increases.
Once the fast trim has been set, then the slow trim can be checked by winding to the full slow position. The slow
trim will be 5 mph faster at maximum all-up weight than at minimum loading.
Do not exceed the adjustment range which is
±6mm (1/4 inch) from the initial factory setting,
or the aircraft may become unstable.
WARNING
!
GTR WING TIP ADJUSTMENT
Содержание QUIK-GTR
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