On Fri, 18 Feb 2005 12:11:05 -0500, "Jim Miller"
wrote:

Any concerns or recommendations?

Hi Jim,

The whipping action is due to vortex shedding - an imbalance of wind
pressure on each side which is oscillatory in nature. To cure it, the
simple resolution is to twist the line so that the face of the line
rotates every 12 to 18 inches.

73's
Richard Clark, KB7QHC

On Fri, 18 Feb 2005 10:06:15 -0800, Richard Clark
wrote:

On Fri, 18 Feb 2005 12:11:05 -0500, "Jim Miller"
wrote:

Any concerns or recommendations?

Hi Jim,

The whipping action is due to vortex shedding - an imbalance of wind
pressure on each side which is oscillatory in nature. To cure it, the
simple resolution is to twist the line so that the face of the line
rotates every 12 to 18 inches.

Dear Richard,

I haven't heard about vortex shedding since 1960 when I was working on
the sonar system that measured the flow over the Polaris Missile Hatch
Doors on the Polaris boats. Bad News!

Bob, W9DMK, Dahlgren, VA
Replace "nobody" with my callsign for e-mail
http://www.qsl.net/w9dmk
http://zaffora/f2o.org/W9DMK/W9dmk.html