I may have been confused, the article wasn't in any of the newsletters that I can find, but these 2 links do discuss them on a 4.
http://bd-4.org/vortexgenerators.html http://bd-4.org/builderlist_sheet.php?id=131 Bob
I may have been confused, the article wasn't in any of the newsletters that I can find, but these 2 links do discuss them on a 4.
http://bd-4.org/vortexgenerators.html http://bd-4.org/builderlist_sheet.php?id=131 Bob