It certainly would look different.
I'm a BIG fan of different.
I did not realize this until you mentioned flutter, but there is the redundancy aspect. If the elevator (all-moving stab) were to flutter and fall off, or just plain break off, the plane would still be controllable since the fixed stab would still be there. (This is just an observation as I'm not one to include mechanical or structural failure in my designs)
-Q.
Originally posted by Gizmo3D
Drag has various forms, one of which is induced (or vortex) drag. Vorticies predominantly form at the tips of flying surfaces such as wings and tails so having two horizontal tail surfaces ( and therefore 4 tips) would effectively double the induced drag produced by the tail i guess.
But would this be noticeable? I doubt it!
I can't see much in the way of an advantage from this setup, and all flying surfaces are prone to flutter if not done properly but having said that it would look a bit different wouldn't it?!
- Martin