KM wrote:
OK now focus here Doug, the math is not in dispute. The question is
whether a glider could exert this force while on tow.

If both aircraft are in a steep dive from a high altitude upset, and
the glider pilot panics and pulls the sitck, it certainly can. But it
really doesn't matter--using a dockline as a tow rope means it won't
break before one of the aircraft does.

But what makes you think the dive would be "Unrecoverable" just because
the tow plane is past its manurering speed?

The dive after an upset will be unrecoverable as long as the glider
stays attached to the towplane.