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  #1  
Old 09-24-2010, 10:47 AM
southbay southbay is offline
 
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Sail-less sail boat
Several years ago, I saw a show that features a fairly large sailboat that had a thick mast, but no sails. The mast was some type of wind turbine or whatever. Does anyone know about that boat, when it happened or its name? Would appreciate any input. You can respond directly to cougarmarineusa@rgv.rr.com
Thanks
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Old 09-24-2010, 10:51 AM
jehardiman jehardiman is offline
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Flettner rotor, look it up on wiki.

Edit to add, though wind provided the driving power to the hull, the rotor was driven by a motor, so it is not a true "wind powered" vessel.
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Old 09-24-2010, 11:17 AM
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PAR PAR is offline
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Ah yes, the Magnus effect, but the motor used to drive the rotors would have driven the hull faster.
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Old 09-24-2010, 11:25 AM
jehardiman jehardiman is offline
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Originally Posted by PAR View Post
Ah yes, the Magnus effect, but the motor used to drive the rotors would have driven the hull faster.
Not on the Baden-Baden, they were only 37 kW each on a 100m, 2000 ton ship. Now on some of the smaller demo platforms.....
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Last edited by jehardiman : 09-24-2010 at 11:33 AM. Reason: Baden-Baden was 2000 tons vice 1000
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Old 09-24-2010, 11:59 AM
jehardiman jehardiman is offline
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here is an intersting site on early articles about Flettner.

http://www.rexresearch.com/flettner/flettner.htm
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  #6  
Old 09-24-2010, 12:27 PM
apex1
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Ah yes, the Magnus effect, but the motor used to drive the rotors would have driven the hull faster.
Both wrong, you and (to some extend) jehardiman.

The power required to drive the Rotor is close to nothing compared with the power provided by the Rotor.

We have a entire thread here, started by Rwatson a few weeks ago.

Everything Old is new again - Flettner Rotor Ship is launched

Regards
Richard
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  #7  
Old 09-24-2010, 02:01 PM
southbay southbay is offline
 
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Gee! Thanks everybody, especially you, jehardiman. I write articles for magazines regarding boats, boating safety and other stuff. Had a great idea for an article about the evolution of boating since some guy crawled onto a drifting log, up to now. But then it's going into what to expect between now and 2030.
Again, Thanks!
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Old 09-25-2010, 08:34 AM
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yipster yipster is offline
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oops missed most of Rwatsons thread, have to read up
only showing here the rotor works vertical as well
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  #9  
Old 12-03-2010, 08:43 AM
parrottdesign parrottdesign is offline
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Alcyone
The best example I've seen of this is the Cousteau Society's Alcyone.

D.
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  #10  
Old 12-03-2010, 09:09 AM
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Doug Lord Doug Lord is offline
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Originally Posted by yipster View Post
oops missed most of Rwatsons thread, have to read up
only showing here the rotor works vertical as well
=============
Yipster, do you have a link to that unmanned plane?
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  #11  
Old 12-03-2010, 12:42 PM
Clarkey Clarkey is offline
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Some video now up on YouTube of the quadruple-rotor 'Enercon E-Ship 1' sailing.

http://www.youtube.com/watch?v=2pQga7jxAyc

ETA - Here is the link to the aircraft in Yipster's post:

http://www.fanwing.com/
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