Where does the "word" 3D come from? In regards to 3D rc planes? 3 dimensional?

Non traditional flying, hanging on the prop, flying in a stall like harriers and hovering.

Once upon a time QQ called it" flying beyond the stall". In other words, the plane was flying on the prop and not the wing. It is the 3rd dimension of flying.

David

The military airplanes call it super-manuverability, super-agility etc.

Ameyam

So 3D isthe 3rddimension. Right.
What's 2D? 1D?

Duh !!! 1st demension & 2nd demension !!! Sorry couldn't help it. To good of a set-up to pass on !!