grumman needs a polish

[catseye]

Man escapes serious injury after light plane crashes south of Canberra

[Walking Ballast]

Good news on the Pilot.

But what exactly is a "'sink hole' of air pressure"?

I must have skimmed over that bit in my books.

[FoolCorsePich]

One less AgCat around the traps. That one was a pretty good example.

[roundsounds]

Air pressure "sink holes" are described in detail in the Manual of Meteorology. They are the reportedly the prime cause of "plummeting" - aka "death dive" and "tail-spin"

[Walking Ballast]

Huh.....Thanks Rounds, I really did skim, and it was a long time ago! No excuse.

I will have to go back have a better look.

And while I don't wish to thread hijack, makes me wonder how many ppl have forgotten a lot of the theory over the years.

[FoolCorsePich]

These sink holes you describe are probably more like mountain rotors.