The two contending planes featured in "Battle of the X-Planes" make use of radically different wing designs: one uses a triangular-shaped delta wing; the other, traditional wings. Each design has ...

all of which require distinctive wing designs. But why aren't there any flightless bats that behave like ostriches—long-legged creatures that wade along riverbanks for fish like herons—or bats ...

This flying flivver (which is actually flying) has no ailerons, elevators or rudder. A movable wing, which can be tipped in any direction by a single steering-wheel, takes over the work of all three.