Tonka 777, entry speed would be as LM said, 400 Knts minimum.
As for flap deployment, a certain Jagmate of a number plate disposition told me trim changes with flaps were not gentle, nor were trim changes with selection of burner or deselection and the air brake tail plane compensation wasn't great in some configuations (pitching up moments for extension and vice versa for retraction even with the minimal compensation by the autostab system).
The large tailplane movement was mainly to cater for the changes of handling with the flaps lowered.. That could cause problems in the more extreme areas of the flight envelope. That was written by a BAe test pilot.
Last edited by Alber Ratman; 7th Oct 2013 at 15:11.