[Brion Toss]

Originally Posted by osteoderm

I have agonized over correct upper swivel position both before and after my installation, with pennants both aloft and alow to maintain proper positioning with the sail where I need it to be.
I think my problem may be with the length of halyard above the swivel: I left enough bare stay above the wrapstop puck (about 14") to be able to slide the foil/drum up if necessary for maintenance/inspection of the otherwise hidden turnbuckle and terminal alow.

As Brian indicated, I believe you are in error about how to get at the turnbuckle; the foil only needs enough travel option to allow for max turnbuckle takeup, probably just 2 or 3 inches. And by the way, be sure to hitch a halyard onto the foil when you get ready to slide the drum up, so the foil doesn't come banging down, shearing off the tab on the bottom of the bottom foil bearing.

With the halyard exit aloft less an inch from the stay, and a foot of halyard to the swivel tang, the action of the puck is not enough to overcome the tendency to wrap. If I crank the halyard tension way up, I exchange the halyard wrap for vertical luff wrinkles and excessive effort at the furling line.

Really hard on the swivel and the sail, too.

The Profurl manual goes on and on about correct upper swivel position relative to the wrapstop, but I can't recall anything at all regarding the position of the top of the foil to the halyard exit. Access to the turnbuckle and lower Norseman was higher on my priority list than squeezing every last inch of foil length onto the stay.

You can get both.

It seems to me that a looser double swivel goes a long way to solving this. The operation of the Profurl swivel is akin to pushing a double row of steel bearings around races packed full of overly thick grease... oh, wait, that's just what it is.

In all fairness, those grease-packed bearings perform about as well as open races when the loads are high.

This week I'm planning to very grudgingly install a halyard restrainer aloft to alter the lead a few degrees in the hopes that this will help.

Don't do it! Get the DVH up where it belongs, and the foil top where it belongs.
Fair leads,
Brion Toss