Health Care Reform, Insurance Reform, Quality

NACA 64-421 Airfoil

The NACA 64-421 airfoil and the circular wire above create the same drag.

A rigid wing may present less drag than the bare pole, roller furled jib and rigging wires in most sailboats.  As a wing may be up to 2.2 times as powerful as soft sails for the same area, a wing may be 1/2 the area for the same amount of drive. You may find the Web sites below helpful.

Feel free to browse around my site. Let me know if you know of any other technical sites that I could find useful. If you have comments or questions please drop me a line at wingsailorflorida@yahoo.com.

• http://www.youtube.com/watch?v=2XOdXPCaQBE&NR=1
  Vestas Speed Sailing Record - The Build Up.
• http://www.youtube.com/watch?v=EfJK5ycx_hg
  Vestas Speed Sailing Record - The Record - The Crash
• http://adg.stanford.edu/aa241/airfoils/images/HighCLSections2.gif
  The best foil ever designed
• http://regenpress.com/
  How foils work
• http://travel.howstuffworks.com/airplane8.htm
  How foils work
• http://www.ayrs.org/
  The Amatuer Yacht Research Society located in England
• http://www.eaa.org/
  The Experimental Aircraft Association sells many technical publications
• http://www.tspeer.com/
  Grasshoppers, enter and learn.
• http://www.soe.ucsc.edu/~elkaim/
  Professor Elkaim built a remote controled wing sailed catamaran
• http://www.homebuilt.org/
  Aircraft related but these home builders know how to build wings
• http://cavity.ce.utexas.edu/kinnas/cavphotos.html
  Photos of foil cavitation -- why boats with stuff in the water loose control.
• http://www.fluidlab.naoe.t.u-tokyo.ac.jp/Research/CavPictures/
  Pictures of cavitation.
• http://www.nalsa.org/
  Land sailing association.  Some interesting designs.
• http://www.team-invictus.co.uk/
  Little America’s Cup winged catamaran.
• http://www.littleamericascup2003.org/
  It is a shame they now sail the Little America’s Cup with soft sails.
• http://www.mastersofspeed.com/
  Speed sailing site.
• http://ybw.com/auto/newsdesk/20040010114004ywnews.html
  British Little Americas Cup Team.
• http://www.homebuilt.org/
  Home built airplane site with lots of information about wings.
• http://www.macquarie.com.au/speedsailing/design.htm
  Speed sailing with a big wing. Trying to best Yellow Pages.
• http://www.miswislandiceyacht.com/
  Miss Wisconsin ice boat.
• http://www.catsailor.com/forums/showflat.php?Cat=&Board=Test&Number=26923&p age=2&view=collapsed&sb=5&o=&fpart=1
  Interesting news group -- winged catamarans.
• http://home.swipnet.se/ansar/s.html
  Man in wing on skates.
• http://www.wingo.com/multihulls/ensta/
  Foils & Wings.
• http://www.thirtythousandfeet.com/home.htm
  Aircraft site.
• http://www.windjetproject.com/
  Speed Week.
• http://www.wingsails.com.au/
  Wing sails in Australia.
• http://www.idra.unige.it/~irro/profilo1a_e.html
  Fluid Flow over a Foil.
• http://www.nasa.gov/centers/langley/news/factsheets/Riblets.html
  Smooth vs. Rough Surface
• http://syr.stanford.edu/SAILFLOW.HTM
  How soft sails work
• http://syr.stanford.edu/CTRResearchBriefAndrew2002.pdf
  High aspect ratio soft sails
• http://www.arvelgentry.com/
  How soft sails work