GIN Boomerang 10 - Manual (Page 32)

Boomerang 10 32 / 62
Line trimming
The Boomerang 10 is trimmed to give the highest possible level of performance and safety. The
aramid lines may shrink or stretch in normal use and particularly after hard shock-reinflations.
Pilots should check that the lines remain within tolerance. The Boomerang 10 is certified with
the lines trimmed so that the total line length from tab to riser is within 2cm of the values
stated in the line-plan. The lines must be measured with a load of 5kg, in order to ensure
reproducible results for a comparison with the lengths in the check sheets.
Due to different measuring systems and calibration there is a possibility of a difference in the
absolute line lengths. In this case, the measured values should first be corrected to the same
base of the Boomerang 10 check sheet data. Correct line length and symmetry are important for
performance, handling and have a considerable influence on flight behavior.
If the lines are more than 2cm out of tolerance they should be replaced. If the lines are less
than 2cm out of tolerance they can be re-trimmed either by taking (or releasing) loops on the
Maillons or by adding an extended Maillon. Contact your dealer or Gin Gliders for details of how
to retrim your glider.
Fig. 4: Allowed loops on Maillons
WARNING Do not under any circumstances use knots to shorten the lines. Any knot will weaken
the line considerably and may cause the line to break in case of high load. The
overhand knot and bowline knots described are permitted only for connecting the
main brake lines/brake handle.
Lines age and lose strength even if the paraglider is used infrequently or not at all. This can
affect the safety and function of your paraglider. Signs of wear are slight bumps or changes in
flying characteristics. The lines must then be replaced immediately. Use only inspected and
approved lines, which can be obtained through Gin Gliders.
A damaged line can result in loss of control of the glider. Always replace lines which are
damaged.
Material stress
Uncontrolled flight positions—such as may be encountered during safety training, extreme
manoeuvres or after massive collapses or cascades—are outside the manufacturer limits of the
paraglider. This may cause a general deterioration in flight characteristics, premature ageing,
or even structural failure.