Re: [Paddlewise] planing

From: Michael Daly <michaeldaly_at_rogers.com>
Date: Fri, 18 Jan 2002 16:12:48 -0500
From: "Michael Edelman" <mje_at_spamcop.net>

> How about, "when a boat displaces significantly less water than 
> its actual weight". Of course, then we need to figure out what 
> "significantly" means....

This is exactly what is measured when we see the CG rise.  In very
general terms, semi-planing is when the boat is displacing less 
than the maximum and planing is when it reaches maximum.  Trim 
changes as well and the nature of resistance changes from wave
and skin friction dominated to spray and skin friction dominated.
None of this defines planing, but describes its behavior.

But remember, the real issue is not what planing is, but what the
difference between planing and surfing is.  I think most folks 
can accept the definition of planing.  They've been talking around
it for a while.

Mike

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Received on Fri Jan 18 2002 - 13:25:34 PST

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