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Old 30-03-2013, 14:51   #16
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Re: Chris White at it again

CW states that when feathered, the parasitic drag of this mast is significantly less than a traditional mast.
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Old 30-03-2013, 16:19   #17
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Re: Chris White at it again

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Originally Posted by cfarrar View Post
CW states that when feathered, the parasitic drag of this mast is significantly less than a traditional mast.
Yes, but Kettlewell and I were discussing whether in a big blow and a quick shift, if it would have time to spin before a damaging load built up on the mast under the old AOA.
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Old 31-03-2013, 00:45   #18
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Re: Chris White at it again

Very high aspect ratio foils are very prone to flutter and that can destroy mast like that in seconds..
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Old 31-03-2013, 03:53   #19
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They fixed that for aluminum jet wings which hit the speed of sound. I imagine it could be easily designed around for carbon fiber wings which won't see more than 100mph.
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Old 31-03-2013, 04:57   #20
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Re: Chris White at it again

Regarding possibility of problems at anchor:

A 50' expedition sailboat (single-masted monohull) I went aboard some years back, with Antarctic and subantarctic voyages to its record, has (most unusually) a non-freestanding wing mast (base shown below) which does not have the advanced servo-feathering control surfaces which the OP boat appears to, and would certainly not feather nearly as readily as a well-engineered full-rotation rig* with only masthead stays, even one lacking advanced feathering.

(I'm assuming that's the case with Chris White's masts?)

I quizzed the skipper (who often sailed short or single handed) and he said there had been no problems, anchored in very exposed and windy situations.

I think a schooner-rigged boat with such a clean rig lying to an anchor is already largely self-feathering, especially in comparison with a boat on land which cannot do this. If the masts can quickly feather to sudden gusts from abeam, so much the better.

I'm not minimising the importance of this issue: There may be a problem, but I can well believe there may not.
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Old 31-03-2013, 14:01   #21
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Re: Chris White at it again

Yes, if that rig with all that mass can rotate sufficiently quickly to avoid a problem, then I would agree that CW's probably would too. On his rig, the mast doesn't even rotate, merely a foil-shaped carbon sleeve over the mast. I have to think this thing is quite light and with low-friction bearings would turn readily.
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Old 10-04-2013, 09:12   #22
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Re: Chris White at it again

new design with mast foil...
MastFoil 41 Catamaran by Chris White Designs
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Old 10-04-2013, 17:41   #23
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Re: Chris White at it again

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Originally Posted by DA Winston View Post
Interesting design. The difference between full and light load, 1,000 lbs seems pretty small for a cruising boat.
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Old 10-04-2013, 19:34   #24
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Re: Chris White at it again

Coincidentally, I am currently in Bocas Marina (Bocas del Toro, Panama) and Chris' boat "Javelin", an Atlantic 55, is docked here...pretty damn impressive...even without a new fangled wing mast.
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Old 21-05-2014, 20:01   #25
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Re: Chris White at it again

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Interesting design. The difference between full and light load, 1,000 lbs seems pretty small for a cruising boat.
I wondered the same thing. Maybe it's lightly loaded has a lot of equipment included?

How can we know for sure? Any progress on this build?

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Old 23-05-2014, 14:10   #26
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Re: Chris White at it again

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Any progress on this build?
Build photos here:
MastFoil 41 - ChrisWhiteDesigns | SmugMug
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Old 25-05-2014, 07:07   #27
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Re: Chris White at it again

During last winters cruise down in Mexico, I saw two of the A47's. BEAUTIFUL boats! I took pics, but unfortunately, I didn't get on board any of them. Amazingly the white one "Escape" which was in La Paz has a home port of Jackson Hole, WY. This is where Cat2Fold's home port is also...
The yellow one, "Bareacuda X", I saw much further south in Barra de Navidad.
"Espiritu Santi", an A57, was moored a few slips away from "Escape"...
The boat porn that I get to see cruising Mexico can be quite the treat!!!
Enjoy...

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Old 30-05-2014, 00:52   #28
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Re:Mast Failure

There's a thread just started at Multihull Anarchy about an apparent mast failure, it's a bit muddled but thought it may interest you guys.

Atlantic Cat Mastfoil Loses Mast? - Multihull Anarchy - Sailing Anarchy Forums
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Old 20-06-2014, 11:39   #29
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Re: Chris White at it again

Any news on this?
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Old 24-07-2014, 05:27   #30
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Re: Chris White at it again

An update on S/V Escape's blog about losing one of the mastfoils, not much detail though

Escape Expeditions
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