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  #11  
Old 02-10-2013
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Re: very strange yacht protuberance

Maybe the working portion of the water-maker?
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  #12  
Old 02-11-2013
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Re: very strange yacht protuberance

Nitrous bottle, for the Unlimited Class around the buoys.
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  #13  
Old 02-11-2013
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Re: very strange yacht protuberance

It is amazing - sailors are such wonderful innovastors

it clearly works for big ships - but on a steel 30 footer...... who can say

I really want to see it in action

Dylan
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Old 02-11-2013
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Re: very strange yacht protuberance

Quote:
Originally Posted by dylanwinter1 View Post
It is amazing - sailors are such wonderful innovastors
Then again, some are simply batsh_t crazy...

Quote:
Originally Posted by dylanwinter1 View Post
it clearly works for big ships - but on a steel 30 footer...... who can say

I really want to see it in action

Dylan
I can't imagine that any effect on performance could be measured in anything beyond a tenth, perhaps two, of a knot... And, probably in the wrong direction...

The proportions are all wrong, when compared to the much more bulbous shapes on large ships... That freakin' thing is simply a prod, in comparison, and I would doubt it would have anything beyond a virtually negligible effect on the displacement, or 'parting' of water forward of the hull... I'd love to hear someone like Bob P's, or Jeff H's take on this one...

The most bizarre aspect to that thing, if I'm seeing your pics correctly, is that it appears not to be mounted on the centerline of the hull, but rather offset slightly to starboard, no? Damn, I'll bet that's gonna do wonders for the straightline tracking ability of that beast...
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Old 02-11-2013
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Re: very strange yacht protuberance

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Originally Posted by flyingwelshman View Post
There was a thread on here a couple of years ago...
It was last fall - click here to view. You probably could not find it because a moderator moved it to off-topic.
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Re: very strange yacht protuberance

Unless a ship is moving at a constant speed (say 18.25kn) a bow like this is only going to hurt efficiency. With a maximum possible gain of 10% or so, and a real world result in the 5-6% range considered very good, the idea of using a bulbous bow on a sailboat is just rediculious. Even most recreational powerboats would never see any gain.

This is a perfect example of someone not knowing why something was added taking a good idea and extrapolating it out beyond any stretch of a good idea.
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  #17  
Old 02-11-2013
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Re: very strange yacht protuberance

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Originally Posted by Stumble View Post
Unless a ship is moving at a constant speed (say 18.25kn) a bow like this is only going to hurt efficiency. With a maximum possible gain of 10% or so, and a real world result in the 5-6% range considered very good, the idea of using a bulbous bow on a sailboat is just rediculious. Even most recreational powerboats would never see any gain.

This is a perfect example of someone not knowing why something was added taking a good idea and extrapolating it out beyond any stretch of a good idea.
pretty funny though - innit?

D
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Old 02-11-2013
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Re: very strange yacht protuberance

Funny ? Oh yes.

As JE mentions the damn thing certainly looks to be off centre and wtf is that stainless tube poking out underneath ?

I remember many years back for a 5.5 metre ??? world championship held off Sydney the Australian challenger sported such an appendage .... monumental failure from go to whoa ... and more whoa than go alas.
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Re: very strange yacht protuberance

Maybe it's an accumulator. Something has to provide the pneumatics to elevate that mobile SCUD launcher on the deck.
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Re: very strange yacht protuberance

..or maybe he was just crossing Whiskey Golf at the wrong time

(Might need to be a PNWer to get that one....)
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