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Ross View Drop Down
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Posts: 1163 		Post Options Post Options   Quote Ross Quote  Post ReplyReply Direct Link To This Post Topic: You can’t be serious
    Posted: 20 May 09 at 9:15pm
http://www.yachtsandyachting.com/news/?article=146578



"Unlike other sealants, HySpeedKote™ is a hydrophilic coating: This means it attracts water. It allows your boat to move through the water with less effort, regardless of composition, configuration, or size."

Edited by Ross
Ross
If you can't carry it, don't sail it!
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s.a.l.t.y View Drop Down
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Posts: 517 		Post Options Post Options   Quote s.a.l.t.y Quote  Post ReplyReply Direct Link To This Post Posted: 20 May 09 at 9:20pm
if the water sticks to your boat wont that cause a hell
of a lot more drag?

so in effect its trying to stick the whole
river/lake/pond to the hull
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radixon View Drop Down
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Posts: 2407 		Post Options Post Options   Quote radixon Quote  Post ReplyReply Direct Link To This Post Posted: 20 May 09 at 9:21pm
Bit like the Apprentice, market it well and sell it at a profit, you got nothing to loose then! 
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zailor View Drop Down
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Posts: 249 		Post Options Post Options   Quote zailor Quote  Post ReplyReply Direct Link To This Post Posted: 20 May 09 at 9:27pm
Well so long as you dont have a hole in the boat you should be fine
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Scooby_simon View Drop Down
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Posts: 2415 		Post Options Post Options   Quote Scooby_simon Quote  Post ReplyReply Direct Link To This Post Posted: 20 May 09 at 9:30pm

Originally posted by s.a.l.t.y

if the water sticks to your boat wont that cause a hell
of a lot more drag?

so in effect its trying to stick the whole
river/lake/pond to the hull

 

Water moves quite easily against itself.

 

Some argue that a slighly rough (say 1200grit wet and dry) is faster than polished as a layer of water sticks to the boat and then you have the firction of water against water instead of water vs hull......
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Mark Jardine View Drop Down
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Posts: 1028 		Post Options Post Options   Quote Mark Jardine Quote  Post ReplyReply Direct Link To This Post Posted: 20 May 09 at 10:15pm
I think you should take a look into the theory behind this before dismissing it!
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ellistine View Drop Down
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Posts: 762 		Post Options Post Options   Quote ellistine Quote  Post ReplyReply Direct Link To This Post Posted: 20 May 09 at 10:37pm
Originally posted by Scooby_simon

Originally posted by s.a.l.t.y

if the water
sticks to your boat wont that cause a hell of a lot more
drag? so in effect its trying to stick the whole
river/lake/pond to the hull


 


Water moves quite easily against itself.


 


Some argue that a slighly rough (say 1200grit wet and
dry) is faster than polished as a layer of water sticks
to the boat and then you have the firction of water
against water instead of water vs hull......


Ski surfaces are 'roughened' or given structure in
warmer snow when the conditions are generally wetter.
Stops the suction effect. Not sure if this is the same.

Edited by ellistine
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NeilP View Drop Down
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Posts: 271 		Post Options Post Options   Quote NeilP Quote  Post ReplyReply Direct Link To This Post Posted: 20 May 09 at 10:41pm
I'd strongly suggest you read FB's conclusions about what surface finish is faster, which are conclusions drawn after a lot of experimentation. Then ask yourself why a hydrophilic coating would make a boat faster. Theory is all very well, but where is the experimental - or even empirical - evidence? i think it's probably snake-oil, myself, like the "magnetic" fuel conditioners the motor trade was inundated with a while back.
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G.R.F. View Drop Down
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Posts: 4028 		Post Options Post Options   Quote G.R.F. Quote  Post ReplyReply Direct Link To This Post Posted: 20 May 09 at 10:58pm
Don't diss it, the stuff works, I used to use some of the early generation
stuff years ago on my then power boat and racing water ski to reduce
friction.

It eventually got banned.

I researched the newer stuff and was going to apply it to the base of my
speed board project last summer, not the spray, believe it or not it can be
extruded and it has the same effect as the slimey feel you get from fish
scales.

Research regelation (the bit that makes ice slippy, and that's the theory.

But I must admit I thought it was a competitive no no in the sailing world
(especially in a One Design boat).

Edited by G.R.F.
https://www.ease-distribution.com/
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alstorer View Drop Down
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Posts: 2899 		Post Options Post Options   Quote alstorer Quote  Post ReplyReply Direct Link To This Post Posted: 21 May 09 at 7:04am
Doesn't this stuff fall foul of Rule 53?

Originally posted by The Rules

53 SKIN FRICTION
A boat shall not eject or release a substance, such as a polymer, or
have specially textured surfaces that could improve the character of
the flow of water inside the boundary layer.


That is, if it actually works. Whilst they've published (on thier site) some trial data that looks good, what would be better would be some lab trials to show the actual effects described. I'm sure I could design an experiment using a rheometer and possibly some surface energy analysis.

One thing though- wouldn't so rightly binding a layer of water to the hull increase the mass of the boat? It doesn't matter that the mass is in the form of something with the same density as the water as far as the mass you've got to move (acceleration) is concerened? How thick a trapped layer are we talking?

I'm not saying it won't work outright- after all, look at the fuss the "sharkskin" suits caused in swimming.

Edited by alstorer
-_
Al
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