That OneSail is nice. It's much simpler than the original Omer
design (three separate panels to reef, hydraulic camber adjustment
on every tack...).
The T at the top of the mast concerns me in that it represents
weight aloft at the extreme as well as concentrated stresses, which
means more weight. Also more windage aloft in a big blow, so less
than idea for a cruiser. That said, it would reduce stresses on the
sail.
My favorite sail until recently has been the SoftWing:
http://soft-wing.ch/en/
It's has the leading edge of the OneSail, yet doesn't require the
T at the masthead, and will automatically take its shape without
having to adjust the camber. The sail shape is also just beautiful.
However, I have worries about the internal structure needed to get
that great shape. All those battens, lines, and blocks... That's
got to add to the cost, as well as create maintenance/longevity
issues when cruising.
I'm also a bit unsure of both the OneSail and SoftWing with
regards to chafe on the mast from the "parrels" and how things would
age when bumped about in choppy seas with light winds.
---
So for now I'd lean towards the Advanced Wing Systems posted by
Filsell in November:
http://www.advancedwingsystems.com/
http://www.k8sports.com/
It looks to be a simplest design that has the added benefit of
working with standard sail track, so a traditional single-skin sail
would also be an option as a replacement or backup. I particularly
like the lack of complexity inside the sail, as well as the lack of
hinges, pivots, and folds. With a rotating mast it would be even
better than the stayed rig shown.
The Advanced Wing Systems sail lacks the smooth leading edge of
the OneSail and SoftWing, but I'd probably give that up in return
for less weight, increased reliability/longevity, and the cruising
benefits of less windage aloft and the ability to keep a single-skin
replacement sail on board.
- Mike
We had a discussion going about Wing Sails but it is over several threads
I thought it might be worthwhile to run a thread that nails in efficiency gains
One Sail are saying '20% smaller area for same performance'
but it is perhaps less sophisticated than where we left discussions last
But it has to be said it has some nice features too
It can be reefed
Camber can be changed
Nicely balanced around the mast enabling retrofit applications more easily
ONESAILS ORI WING
OneSails Sailmakers :: WING SAILS :: The Next Generation of Sails
Posted by: Mike Crawford <mcrawf@nuomo.com>
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