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- From: whoward@lamont.ldgo.columbia.edu (Will Howard)
- Subject: Re: Gybing Centreboards
- Message-ID: <1992Dec23.150941.20653@lamont.ldgo.columbia.edu>
- Sender: news@lamont.ldgo.columbia.edu
- Organization: Lamont-Doherty Geological Observatory
- References: <1992Dec18.224526.3054@atlastele.com> <BOWERS.92Dec22122726@rigel.dfrf.nasa.gov>
- Date: Wed, 23 Dec 1992 15:09:41 GMT
- Lines: 16
-
- In article <BOWERS.92Dec22122726@rigel.dfrf.nasa.gov>
- bowers@rigel.dfrf.nasa.gov (Al Bowers) writes:
-
- >The killer with this arrangement is that a perfect seal between a
- >gybing board and the bottom of the hull (board case) is near
- >impossible to achieve. This results in large amounts of water
- >sloshing around in the board case. This is wasted energy.
- >
- >You dinghy types can try a simple experiment. Remove your board next
- >time on a downwind run in low to moderate winds. As you remove the
- >board, look down into the case. Lots of water sloshing about. Bad.
- >Very bad. :-) That, my friends, is the definition of drag.
-
- That's why in a boat like a Laser in which you can remove the daggerboard
- completely, you really want to leave it in the slot, raised. Unless you've have
- some sort of gaskets that close over the slot.
-