- Interplane strut
caption=Metal interplane struts of a Bücker Jungmann
An interplane strut is an aircraft
airframecomponent used on biplanes and other aircraft with multi-wing designs. They are designed to transmit lift and landingloads between wing panels, which are often braced with wires, they also maintain the correct angle of incidencefor the connected wing panels. Very early aircraft designs used interplane struts made from Bamboo[Taylor, 1990. p. 71.] which were later replaced by streamlinedstruts made either from Spruceor Ash, woods chosen for their strength and light weight. More modern or higher performance aerobaticbiplanes often feature metal interplane struts.
The most common configuration is for two struts to be placed in parallel, one behind the other. These struts will usually be braced by wires running diagonally between them, and more than one of these strut pairs may be placed along the span of the wing, creating multiple "bays" (see below). Other common arrangements include N-struts, where the diagonal bracing wires are replaced by an extra wooden or metal member running diagonally from the top of one strut to the bottom of the other in a pair; V-struts, where the struts from the upper wing converge to a single point on the lower wing (commonly used when the lower wing has a considerably smaller chord than the upper wing), and the I-strut, where the pair of struts is replaced by a single, thicker strut. Some biplane wings have been braced with struts forming a
The compartments created by adding interplane struts are known as 'bays', this relates to only one side of the aircraft's wing panels. For example, the
de Havilland Tiger Mothis a single-bay biplane where the Bristol F.2 Fighteris a two-bay biplane. [Taylor, 1990. p. 76]
* Taylor, John W.R. "The Lore of Flight", London: Universal Books Ltd., 1990. ISBN 0-9509620-15.
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