On Fri, 24 Mar 2006 11:48:11 -0500, clare at snyder.on.ca wrote:

You haven't driven much on "salt belt" highways, eh??
Washboard/frost-pocked roads are rougher than a LOT of aircraft!

I live in Vermont Clare, we call that stuff "frost heaves" and what we
have here is legondary. I've seen guys dent their roofs from being
bumped by the frost heaves. Imagine mile after mile of close together
speed bumps.

But that kind of bumping is not like the frequency at which a prop
vibrates. Whole different thing. Besides, folks slow down for them,
or loose their suspension.

Or at least that's my take.

Corky Scott