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 Post subject: Steering Line Shrinkage
PostPosted: Sat Aug 27, 2016 10:15 am 
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Joined: Mon Jan 25, 2016 3:18 pm
Posts: 130
On my i11s, with the upgraded spectra steering lines, I'm experiencing a strange phenomenon: when dry, the lines become loose. I would tension the lines correctly at the rudder after a fishing trip, and 2-3 days later there's slight play in the steering.

Coming off a 3 week hiatus from fishing, the lines are completely loose; turning the steering knob barely engages the rudder at all. I'm assuming that this is due to the lines being completely dry, and that there's a significant wet/dry tension difference in the spectra.

Anyone else experiencing this change?


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PostPosted: Sat Aug 27, 2016 10:55 am 
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Joined: Sat Aug 16, 2014 4:00 pm
Posts: 502
Did you see this thread /viewtopic.php?f=11&t=58843 where I point out boat size variation as well as slight line stretch can happen, then am beaten over the head by all saying Hobie spectra cannot and never has shown stretch and didn't I ever consider boat stretch? Also it seems to end with a diagnosis of how the screw was tightened - I think I noticed variation on mine on which way the loop went around the screw.

Anyway, my spectra stays stable (assuming the boat does) and only loosened a bit when new. This is how it is supposed work - creep a bit the first few times you use it under load, and generally not shrink. In the paragliding world a while back, spectra lines could shrink when you lay it out on wet grass, and this was attributed to a nonspectra abrasion sheath - dunno if your new ones have a sheath but my old don't appear to.

Spectra also was shown to shrink for paragliders due to some makers prestretching lines to prevent creep, and it would give back a bit. The tiniest change in line lengths can cause aerodynamic warp, so folks would periodically stretch at least the lines with low loading. I don't see how you could get that much slack though, maybe your boat isn't pressured as much?

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