Owen Duffy wrote in
:

An email correspondent suggested that there was no use for such a thing. If
your antenna didn't blow down last season, then it wasn't big enough!

Well, you could use the calculator to remove most of the uncertainty and be
quite confident it *will* blow down. To do so, use a safety factor well
less than 1, say 0.5 should be reliable, and use a low wind speed, so that
you don't need to wait long for the event.

Owen