Flying wing is the generic designation given for a fixed-wing aircraft configuration which is capable of stable, controllable flight without the aid of lifting surfaces other than the main wing itself, that is, without auxiliary surfaces such as "tails" and "canards". Additionally, the term is usually applied to aircraft in which most of the payload is transported inside the main wing, the latter comprising most of its structural volume. A variation of such configuration in which a payload bearing fuselage is present is usually known by the less restrictive designation of "tailless aircraft".