[/QUOTE] This probably wouldn't work in a total engine-out scenario, either. There the effectiveness of the empennage would be reduced, and it would be a wobbly-goblin.[/QUOTE]
With total engine out, there's no need for any more rudder 'effectiveness' than is already designed in any airplane?
[/QUOTE] The whole vertical fin moved, just like a slab.
Lighter, smaller, less wetted area, more authority available when needed. Coupled with a modern FBW system? Easier than a blown-tail.
But, I guess they couldn't take a lesson from an "antique" 1950s jet....[/QUOTE]
I would really doubt that any manufacturer could modify say a Boeing 777 with an all moving vertical stab that would be lighter and easier than a smaller vertical stab designed with Active Flow Control. The entire tail section would require modifications and huge structural pivot pin beams plus the actuation system required to move it? nope...