Kayak and Canoe Design Bulletin Board

Re: Skin Friction reduction

Posted By: Nick Schade
Date: Wednesday, 17 October 2001, at 10:15 a.m.

In Response To: Re: Skin Friction reduction (john Umlah)

I think it is unlikely that anyone will get a kayak moving fast enough to create cavitation.Ventilation may be possible.

Cavitation - pressure differential sufficient to create a bubble of vacuum.

Ventilation - pulling air down from the surface.

: Hello All: I suppose I am kinda answering my own quetion now but I have been
: doing some reading on the skin friction of hulls of boats. I have found
: that if a surface is textured properly then the water cavitates due to the
: reduction in pressure in the zones of the small "pockets". The
: resulting air bubbles act as small ball bearings reducing the surface area
: in contact with the water. The theory is good but can it be done with
: conventional building techniques? Is it practical for a recreational
: paddler?

Messages In This Thread

Skin Friction reduction
John Umlah -- Monday, 1 October 2001, at 10:26 a.m.

Re: Skin Friction reduction
Brian Nystrom -- Monday, 1 October 2001, at 12:02 p.m.

Re: Skin Friction reduction
Nick Schade -- Tuesday, 2 October 2001, at 10:18 a.m.

Re: Skin Friction reduction
Pete -- Thursday, 11 October 2001, at 11:20 a.m.

Re: Skin Friction reduction
garland reese -- Monday, 15 October 2001, at 5:08 p.m.

Re: Skin Friction reduction
john Umlah -- Tuesday, 16 October 2001, at 10:18 a.m.

Re: Skin Friction reduction
Nick Schade -- Wednesday, 17 October 2001, at 10:15 a.m.

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