*From:* Pat Flannery
*Date:* Fri, 31 Oct 2008 17:37:37 -0600

Rick Jones wrote:
Wish I fully understood it I wonder what is done in
Merlin-1C/Falcon[19] wrt the issue?


It will make your scrotum vibrate painfully; that's all I had to
understand to rule out any flights on a large rocket for me. :-D
Seriously, it generally occurs with larger engines or clusters of
engines; so Falcon 9 would probably be more prone to it than Falcon
1, as all nine engines firing at once could generate interesting
harmonic effects among them.
Saturn I apparently didn't have many pogo problems though, and
that's probably about the closest analogy to Falcon 9 in design, at
least as far as clustered engines go.

Pat

Surely the closest booster to the Falcon 9 in design is the
Vostok/Voshkod/Soyuz booster?