Suspension lines condition check
The paraglider is hung up and the lines are sorted out.
- visual check (sheath, stitching, tears)
- manual check (any changes in the core)
- positioning of the brake handles (should be fastened at the original marks, this length is controlled).
In case of any doubts the lines are replaced.
Measuring of suspension lines length (with electronic device)
Both risers are hooked together so that they remain in equal position and distance from the measuring person. Then the lines of right and left side are
slightly stretched, to check that their length remains the same.
After that we free the risers and hook the brakes together, to be checked in the same way.
Differences greater than 10 mm are automatically pointed out with change of background colour. All results are then saved in proper files.
This examination is considered positive when max. variation from expected value does not exceed 30 mm, and the difference between maximum variations is no greater than 15 mm.At Dudek Paragliding we measure lengths with Eng. Peter Worner's electronic device. The measurement is taken when the lines are being strained with 5 daN force for 0.5 seconds. The measurement can be taken manually, provided that it is carried out under a 5 daN strain.
If the less-loaded suspension lines (most often of C and D rows) are shown to be considerably shortened, they can be stretched back to their original length with a 20 daN force. The stretching must be done symmetrically, and afterwards the lines must be measured again. Nevertheless, we urge the pilot to avoid factors that cause shrinking of the line sheath (especially excessive humidity).
Noticed irregularities in the lines are examined manually and the lines are replaced when necessary.
