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Re: Placebo effect-why?
By:Chuck in Pa
Date: 12/21/2004, 10:24 pm
In Response To: Re: Placebo effect-why? (Brian Nystrom)

: One other consideration is that polishing is not necessarily beneficial,
: either. It's common among sail racers to sand the surface of their hulls
: lightly (IIRC 400 grit creates the preferred texture), which reduces drag
: in the water. Note that this produces a uniform surface and is not the
: same as having a scratched hull or varnish with lumps, runs and brush
: streaks. Whether this applies to kayaks and their lower speeds is
: debatable and I don't claim to know the answer. AFAIK, no one has done a
: definitive study on this.

I've read some about this. It seems that the concept is to change the friction from water/hull to water/water, by dragging a layer of water along with the boat. I think it's an interesting concept. Whether it would really help a kayak is debatable, but it seems to be pretty debatable on million dollar yachts.
Another insteresting material is bottom paibnt with teflon, which is designed to be polished. The teflon is more so that speed stealing growth cannot stick to the hull, rather than direct loss of friction, but it is interesting anyway.

-Chuck

Messages In This Thread

Strip: Cloth weight opinions
Holmes -- 12/17/2004, 12:33 am
Re: Strip: Cloth weight opinions
Jim Looker -- 12/20/2004, 10:49 am
Re: Strip: Cloth weight opinions
J. R. Ackley -- 12/21/2004, 7:55 pm
Re: Strip: Cloth weight opinions
pikabike -- 12/17/2004, 12:58 pm
Re: Strip: Cloth weight opinions
Paul Jacob -- 12/17/2004, 12:53 pm
Re: Strip: Cloth weight opinions
Rob Macks -- 12/17/2004, 1:51 pm
Re: Strip: Cloth weight opinions
Paul Jacob -- 12/17/2004, 6:56 pm
Re: Strip: Cloth weight opinions
Mike Scarborough -- 12/17/2004, 9:18 am
Re: Strip: Cloth weight opinions
bryan gorr -- 12/17/2004, 2:53 am
Re: Strip: Cloth weight opinions
Thomas Duncan -- 12/17/2004, 8:00 am
Graphite Experience
Jay Doorly -- 12/18/2004, 1:59 am
Re: You are waxing poetic.
Gordon Niessen -- 12/20/2004, 7:26 am
Tungsten filled epoxy.
John Monroe -- 12/20/2004, 4:04 am
Re: Tungsten filled epoxy.
Robert N Pruden -- 12/20/2004, 12:42 pm
Re: Carbide filled epoxy. Blue *LINK*
John Monroe -- 12/21/2004, 4:08 am
in a candy store
LeeG -- 12/20/2004, 6:27 pm
Placebo effect
Brian Nystrom -- 12/19/2004, 8:44 am
Re: Placebo effect
Jay Doorly -- 12/20/2004, 11:41 pm
Re: Placebo effect-why?
Thomas Duncan -- 12/19/2004, 7:46 pm
Re: Placebo effect-why?
John D. -- 12/20/2004, 12:48 am
Re: Placebo effect-why?
Jay Doorly -- 12/21/2004, 12:40 am
Re: Placebo effect-why?
Rory -- 12/21/2004, 4:37 am
Re: Placebo effect-why?
John D. -- 12/21/2004, 2:11 am
Re: Placebo effect-why?
Brian Nystrom -- 12/21/2004, 12:27 pm
Re: Placebo effect-why?
Gennie -- 12/22/2004, 2:37 am
Re: Placebo effect-why?
Chuck in Pa -- 12/21/2004, 10:24 pm
Re: Placebo effect-why?
Jay Doorly -- 12/21/2004, 11:22 pm
Re: Graphite Experience
Thomas Duncan -- 12/18/2004, 10:38 am
Re: Graphite Experience
LeeG -- 12/18/2004, 9:26 am
thought experiment
LeeG -- 12/17/2004, 8:14 am
Re: thought experiment
Thomas Duncan -- 12/17/2004, 9:25 am
Re: Real experiment
pikabike -- 12/17/2004, 1:10 pm
Re: Real experiment
LeeG -- 12/18/2004, 9:10 am
Re: thought experiment *LINK*
Glen Smith -- 12/17/2004, 11:16 am