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Tost weak links

Tost weak links in their optimized format combine the following improvements:

  • Longer service life
  • Correct marking with load group and manufacturer’s name
  • Made of high-quality certified aircraft steel
  • Clear distinction from inferior copies
  • Manufacturing tolerance only 5% (in the requirements 10% are stipulated)

Like our type-tested products our weak links are also manufactured according to EASA-approved production methods.
Each batch is tested on computerized test equipment and the results are documented. This guarantees consistent high quality and traceability.

Important Notes

  • Weak links protect your aircraft against overloading
  • Use only the weak link stipulated in your aircraft TCDS or aircraft manual
  • Checking the cable preamble is mandatory according to SBO (German Gliding Operation Regulations); this includes the inspection of weak links
  • Replace the weak link immediately in the case of a visible damage
  • We recommend that the weak link inserts are replaced after 200 starts; an insert exchanged in time is always safer and cheaper than one single aborted launch
  • Always use the protective steel sleeve
  • Use only the correct shackles; they prevent the weak link and the steel sleeve from twisting and hence an undefined increase of the breaking load
  • Never use two equal inserts, e.g. both with round holes, in a reserve system since this would double the breaking load

Using combinations of weak link inserts from different manufacturers can double the breaking load because of the length change (elongation) of inferior inserts!


Tost weak links – examples



Load table
Winch launch and aero tow

Colour Breaking load
Single insert
round hole            P/N
Reserve insert
oval hole                P/N
1 black 1000±100 110101 110121
2 brown 850±85 110102 110122
3 red 750±75 110103 110123
4 blue 600±60 110104 110124
5 white 500±50 110105 110125
6 yellow 400±40 110106 110126
7 green 300±30 110107 110127

Load table
Kites, hang gliders, ultralights

Colour Breaking load
Single insert
round hole             P/N
Reserve insert
oval hole              P/N
8 mauve 200±20 110108 110128
9 grey 150±15 110109 110129
14 turquoise 120±12 110114 110134
11 orange 80±10 110111 110131


Tow cable and fan assembly

Tow cable + fan ass.

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