From: "Ron and Marlene Brice" <rbrice@inter-linc.net>

David,

You forgot to consider negative "G's".

That's a far likely scenario than pulling enough positive "G's" to separate
the wings.

Doesn't take nearly as much negative, less than ½.

See:
 http://www.thestarpress.com/tsp/news/local/03/may/0528planecrashnews.php
Wait for this one to load, it's a newspaper article:
http://www.thepeoplesentinel.com/index2.html
http://www.ntsb.gov/ntsb/brief.asp?ev_id=20030520X00696&key=1

Ron