20-08-2010, 09:47 AM
The overspeed warning comes on at the maximum operating speed for a reason. It demands from the pilot immediate reaction to reduce speed. Maximum operating speed is set so that the pilot can react before the plane reaches the Design Dive Speed (Vd), which is 420 knots calibrated airspeed for a Boeing 767 (at sea level this is 420 knots true airspeed, 483 mph).
That is the highest speed at which the plane is required to remain controllable, higher than that all bets are off. Even between Vmo and Vd permanent structural damage is possible, which is why an inspection for structural damage is usually required if Vmo has been exceeded.
Hitting the buildings in the way is was done requires an extraordinary amount of control. To think that this could have been done in a speed range far beyond the highest speed at which the plane remains controllable is against my intuition.:dontknow:
That is the highest speed at which the plane is required to remain controllable, higher than that all bets are off. Even between Vmo and Vd permanent structural damage is possible, which is why an inspection for structural damage is usually required if Vmo has been exceeded.
Hitting the buildings in the way is was done requires an extraordinary amount of control. To think that this could have been done in a speed range far beyond the highest speed at which the plane remains controllable is against my intuition.:dontknow:
The most relevant literature regarding what happened since September 11, 2001 is George Orwell's "1984".