I looked at the strait luff sails
, but I really wanted a sail to go deeper than that would allow. Theoretically we can carry a true deep runner, but settled on an AP, so we can harden the luff to go upwind, and let it out and go deep.
Up until this Selden unit came out there were really two options, the tight luff furlers that ran around $1,000 or a top down unit from Karver that is about $3,000. Then I found the selden unit was coming out, and the price
on it, and decided to wait until it was available.
The sail flies free of the torsion rope
completely. The tack is attached to a swivel, the drive line turns the torsion line, which is attached to a head
unit. As the furling
line is pulled, the torsion line rotates, but the sail tack stays stationary. As the torsion line spins the top swivel starts to roll up the sail.
I haven't had it up yet so I can't confirm it works as advertised, but I have used the Karver units before, and they work a treat.