HELICOPTER
A heavier-than-air aircraft supported in flight chiefly by the reactions of the air on one or more power-driven rotors on substantially vertical axes.
HELICOPTER
A heavier-than-air aircraft supported in flight chiefly by the reactions of the air on one or more power-driven rotors on substantially vertical axes.
comment
A heavier-than-air aircraft su ...... n substantially vertical axes.
label
HELICOPTER