An aƫroplane with two main supporting surfaces one above the other.
Having, or consisting of, two superposed planes, aƫrocurves, or the like; of or pertaining to a biplane; as, a biplane rudder.
An airplane with two sets of wings, one on top of the other. Historically the biplane configuration was used as it improves the bending stiffness of the wing that was otherwise difficult to achieve in early monoplane designs. Search for biplane books on Amazon.co.uk
Airplane with two wings, one wing above the other
A fixed-wing aircraft having two superimposed wings.
An aircraft with two pairs of wings, one pair above the other. Biplanes were popular until the 1930s.
An airplane having two wings on each side of the fuselage, one usually slightly forward and above the other.
An airplane with two wings on each side of the body, usually one several feet above the other.
old fashioned airplane; has two wings one above the other
An aeroplane or glider which has two mainplanes (main wings) one above the other.
An aeroplane with two sets of wings, one above the other.
An aeroplane with two similar-sized wings (or pairs of wings), exactly or approximately in vertical alignment.
An airplane with two sets of wings. The first airplane ever built had two sets of wings, one on top of the other.
A biplane is a fixed-wing aircraft with two main wings of similar spans, normally one mounted above, and the other level with the underside of the fuselage. The upper wing normally overlaps the lower wing, and vertical or slightly raked slender struts are often positioned symmetrically on either side of the fuselage (connecting the rigid sections of the upper and lower wings into a strong box structure). When the upper and lower wing overlap only partially, this is known as stagger; it is designed to minimise aerodynamic interference between the two wings.