Re: sailing upwind? [postscript]

[brian whatcott <inet@INTELLISYS.NET>]

> I wrote a note to Professor Bose inviting him to explain the principle
> of his boat's ability to sail into the wind.
> If he responds, I'll share....

> Brian

Reply-To: <nbose@engr.mun.ca>
From: "Neil Bose" <nbose@engr.mun.ca>
To: "'brian whatcott'" <inet@intellisys.net>
Subject: RE: Sailing Into Wind
Date: Wed, 5 Jan 2000 08:37:40 -0330
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Dear Brian,

I suggest you have a look at one of my papers, or those
of similar workers.

See e.g.:

Bose, N., Windmills - ....  Roy. Inst. of Naval Architects
Symp on Wind Propulsion of commercial ships, 1980.

Bose and Small, G.H., 1985, Wind turbine drives - ....
J. of Wind
Engineering and Industrial Aerodynamics, 20, pp. 283-295.

Bose and Wilkinson, J., Performance tests on the Wind turbine
powered catamaran, Revelation, Wind Engineering, 9 (1), pp 9-23.

Neil Bose
Professor
Chair, Ocean and Naval Architectural Engineering
Director, Ocean Engineering Research Centre
Faculty of Engineering and Applied Science
Memorial University, St. John's, NF, A1B 3X5
Tel.: +709-737-8805
Fax: +709-737-2116
nbose@engr.mun.ca <mailto:nbose@engr.mun.ca>
www.engr.mun.ca/Naval <http://www.engr.mun.ca/Naval>
www.engr.mun.ca/OERC <http://www.engr.mun.ca/OERC>
www.engr.mun.ca/ECOR <http://www.engr.mun.ca/ECOR>



-----Original Message-----
From: brian whatcott [mailto:inet@intellisys.net]
Sent: Friday, December 31, 1999 6:48 PM
To: Dr. Bose
Subject: Sailing Into Wind


Dear Professor Bose,
I responded to a recent puzzle on a physics interest list
phys-l@lists.nau.edu
(inhabited mainly by physics teachers and professors)
which invited one to analyse the possibility of sailing
directly up wind.
I concluded that the only way I could see to do this was
to take advantage of a velocity gradient (moderating towards
water level) in order to have the upper wind spin the prop
to provide a net increase of air momentum through the disk.

I see from examination of a web site that you have direct
experience in this area. I would be most grateful if you
could sketch the momnetum or energy balance involved in sailing
directly into wind.

Thanks in anticipation.

-------------------------------------------------------------------





brian whatcott <inet@intellisys.net>
Altus OK