V-Tail vs. Conventional Tail
These are drawings to show the efficiency of the two different tail configurations. Because the V-tail is not deflecting directly up, it has counteractive yaw. The right ruddervator gives some left yaw, and the left ruddervator produces some right yaw. This is a waste of control surface movement because it isn't doing anything. As the physics shows, the conventional tail is more efficient. It actually has 125% the authority of a V-tail. This means less travel is needed on a conventional tail. This means less drag, which causes less loss of speed in the turns.
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