I don't want to make any commentary on your level of knowledge, but recommending people ignore fraying pulley lines because they have a core is not a recognized best-practice for safe kite use and maintenance. If the pulley lines are shrunken to a degree where the mixer cannot be adjusted to make the kite fly sufficiently well, they should be replaced regardless of their physical degradation. I mean, we're talking about a few small segments of line that are available for purchase ready-to-install for a few US dollars. That, to me, is a perfectly reasonable expense if I can no longer properly tune my kite.foilholio wrote: ↑Mon Apr 23, 2018 3:07 amHaving run many a pulley line to destruction, replacing them for shrink is wasteful. Sheathed line has a wonderful soft failure where the core can remain intact for quite a while after sheath failure, noticeable as a rough point when sheeting. You can get stuck pulleys and other bad things happen or even full failure, best avoided if you can. I know the furry and thinning signs of a pulley line that is about to go so I usually replace them. But even with full failure I have ridden the kite in. Kite still works somewhat with just A and Z intact, another safety advantage of foils over tubes.
You have 15 years designing making kites, congratulations. There is many many kite designers/makers who once made for some well known brands, now they don't and most just do repairs. Ever wonder why that is? I can see you are knowledge in kite construction techniques, somewhat in design, but adjusting kites particularly old ones not so much. Also your understanding of fluid dynamics is well flawed, and that's a hint to the previous question to think on.
I'm not sure if you're aware of the tone of your posts, but I'll make a couple of observations and hopefully it will be helpful for you:
1) You and Kitexpert totally ruin threads when you pull this BS. For people coming in here looking for a good-faith explanation of how to maintain their expensive purchases, you guys bring this discussion in totally the wrong direction - away from simple, safe, easy tips and tricks into some kind of crazy in-depth conversation about fluid dynamics that isn't merited. We should trust that Armin did his homework and that what we need to discuss is the practical lengthening or shortening of lines.
2) From a 3rd person perspective as a fellow foil kite owner/tuner, Kitexpert is making more sense in this thread than you are. It's possible that I might that way because I lack your level of knowledge on the topic, but given my background and education, I think that's unlikely. It seems to me that your advice is of a lower quality and less clearly articulated than his. If you wish for people to value your input on the forum, you should reflect on that before launching personal insults and attacks his way publicly.