One of the reasons that the Americans didn't have that many deep-stall accidents was that after the 1-11 accident BAC decided to share it's knowledge with the American manufacturers. Several people from BAC went to visit Boeing and McDonnell Douglas and others, and explained all the data and experiences to them. This saved the Americans from having to try it for themselves..... .. .The VC10 is one of the few t-tailed aircraft to have a natural nose-down pitching tendency at the stall. In just one extreme configuration did the certification pilots have doubts on whether the pitching moment would be strong enough, and to cater for this extreme case the CAA wanted the stick pusher fitted. Brian Trubshaw explains the phenomenon in his book 'Test Pilot'.. .. .On Trident G-ARPI: apart from captain Key's heart attack the main reason that the aircraft got itself into the deep-stall situation was retraction of the LE slats at too low a speed (since known as a configuration stall). The full report can be found on: <a href="http://www.aaib.dtlr.gov.uk/formal/garpi/garpi.htm." target="_blank">http://www.aaib.dtlr.gov.uk/formal/garpi/garpi.htm.</a> I think the report on the 1-11 crash is also somewhere on that site.. .. .<a href="http://Fly.to/VC10" target="_blank">http://Fly.to/VC10</a>