"BTIZ" wrote in message
newsK_Ic.259$gQ2.161@okepread03...
...snip...

as I said MY original response.. I'd have to go back and find the article
I
read it from



Since the post, I did a little googling, and found the FAA AIM has basically
the same quote:

http://www.faa.gov/ATpubs/AIM/Chap7/aim0703.html

7-3-3. Vortex Strength

a. ...snip... The greatest vortex strength occurs when the generating
aircraft is HEAVY, CLEAN, and SLOW.

(this time the emphasis is theirs)