Some time back I saw a magazine article about something mysterious
called "pan turbulence" that bit airliners in clear air, often
somewhere in the middle of the USA.

Could this have been plain old rotor by any chance?

I was reminded to ask this by the message about the "Rodeo In The Sky"
TV program.
--
martin@ : Martin Gregorie
gregorie : Harlow, UK
demon :
co : Zappa fan & glider pilot
uk :