When you depart an Aircraft from High Altitude unintentionally,or in an intentional Training Sortie,the Aircraft does NOT enter a flat spin,unless deliberately induced,although it can seem like that from inside the cockpit.It actually loses lift from different points along the wing and stabiliser,so enters a tumble of pitch yaw roll oscillation.If you used to watch "War in the Air" films of battle damaged B17s and B24s entering spins,these are rather more uncontrolled tumbles than actual spins.A flat spin is rather hard to get into especially in a large aeroplane,but a departure tumble can happen ,especially when flying through extreme Up and Downdrafts in Cbs.We used to do that in Training when deliberately exceeding Crit mach to show departure recovery.,albeit many years ago.Incidentally KLM used to use 2 Harvard Trainers up to the 70s or maybe longer to give Long Haul Captains Spin awareness Training,as Crews had not seen the manoevre for so long since initial Flight Training.I believe the Pilots Union had it stopped as it caused much trepidation to older Captains.To experience the like in a 200 Ton Airliner beggars belief.let alone trying to recover with normal controls,let alone a side stick in "Alternate Law"!!!
Last edited by FAStoat; 8th Jul 2009 at 12:31.