Joe wrote:

DSK wrote in message ...

Joe wrote:

Remember that sail/MV that J. Cousteau's son had?
It had 3 big poles for sails.

They weren't "poles," they were Flettner rotors.


Thanks, I found a german sight with lots of information and pictures.
http://www.der-katamaran.com/Konstru...ner_rotor.html


Hey Joe! How about the NACA document from 1925,

http://naca.larc.nasa.gov/reports/19...aca-tn-228.pdf


Cheers
Marty