Biplane

A biplane is a fixed-wing aircraft with two main wings stacked one above the other. The first aircraft to fly, the Wright Flyer, used a biplane design, as did most aircraft in the early years of aviation. While a biplane wing structure has a structural advantage over a monoplane, it produces more drag than a similar unbraced or cantilever monoplan...
Found on http://en.wikipedia.org/wiki/Biplane

Biplane

• (a.) Having, or consisting of, two superposed planes, aerocurves, or the like; of or pertaining to a biplane; as, a biplane rudder. • (n.) An aeroplane with two main supporting surfaces one above the other.
Found on http://thinkexist.com/dictionary/meaning/biplane/

biplane

noun old fashioned airplane; has two wings one above the other
Found on https://www.encyclo.co.uk/local/20974

Biplane

Bi'plane adjective (Aëronautics) Having, or consisting of, two superposed planes, aërocurves, or the like; of or pertaining to a biplane; as, a biplane rudder.
Found on http://www.encyclo.co.uk/webster/B/55

Biplane

Bi'plane noun [ Prefix bi- + plane .] (Aëronautics) An aëroplane with two main supporting surfaces one above the other.
Found on http://www.encyclo.co.uk/webster/B/55

biplane

airplane with two wings, one above the other. In the 1890s this configuration was adopted for some successful piloted gliders. The Wright brothers` ... [3 related articles]
Found on http://www.britannica.com/eb/a-z/b/67

Biplane

An aeroplane or glider which has two mainplanes (main wings) one above the other.
Found on http://www.aeroplanemonthly.com/glossary/

biplane

An aeroplane with two similar-sized wings (or pairs of wings), exactly or approximately in vertical alignment.
Found on http://www.translationdirectory.com/glossaries/glossary370.php

Biplane

An airplane having two wings, one placed above the other.
Found on http://www.sportpilot.org/learntofly/glossary.html

Biplane

An airplane having two wings, one placed above the other.
Found on http://www.superglossary.com/Glossary/Technology/Aviation/

Biplane

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. Struts were used to maintain the angle between the upper and lower surfaces and wire braces used to tie the whole structure ...
Found on http://www.diracdelta.co.uk/science/source/b/i/biplane/source.html

biplane

biplane, aircraft, typically of early design, having two sets of wings fixed at different levels, especially in a vertical stack with the fuselage included between them. See airplane.
Found on http://www.infoplease.com/ce6/sci/A0807634.html

biplane

[n] - old fashioned airplane
Found on http://www.webdictionary.co.uk/definition.php?query=biplane
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