quadruplane

Example:Historical records show the early pioneers of aviation preferred biplanes over quadruplanes.

Definition:An aircraft with two sets of wings, one above the other, typical of early aeroplanes.

Example:Some experimental designs of the early 20th century featured triplanes and quadruplanes, although these were not common.

Definition:An aircraft with three sets of wings, typically with one above and two below or vice versa, used in early aircraft designs.