quadruplanen.
/ˈkwɒdrᵿpleɪn/, U.S. /ˈkwɑdrəˌpleɪn/ 1. Mathematics. A structure consisting of four rigid plane pieces, each in the form of a right-angled V, hinged end to end to form a closed chain.
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1875 J. J. Sylvester in Nature 15 July 214/2 Another recent kinematical invention..which..I propose to term the Quadruplane.
1877 A. B. Kempe How to draw Straight Line 36 The four foci of the quadriplane shown in the figure.
1940 National Math. Mag. 14 190 First noticed by A. B. Kempe who was thus led to the quadruplane and skew pantograph.
1994 E. A. Dijksman in J. Lenarčič & B. Ravani Adv. Robot Kinematics x. 412 (caption) Quadruplane inversor of Sylvester and Kempe.
2. Aeronautics. An aeroplane with four sets of wings, one above another. Now historical.
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society > travel > air or space travel > a means of conveyance through the air > aeroplane > [noun] > with more than one wing either side
biplane1874
triplane1908
multiplane1909
quadruplane1909
1909 A. Berget Conquest of Air 141 Naturally we can make triplanes or quadriplanes, but one must not proceed too far in this direction.
1909 Times 17 Aug. 10/5 Major Baden-Powell will attempt a flight with his quadruplane.
1919 Jane's All World's Aircraft 60 a (caption) Experimental Armstrong-Whitworths.—Two of the F.K.10 Type Quadruplanes.
1987 H. S. Villard Contact! x. 214 His quadriplane was overtaken by the rapid development of monoplanes and biplanes.
1999 New Scientist 14 Aug. 52/2 Over the next few years, Pratt's workers made parts for torpedo seaplanes and flying boats..—even an experimental quadruplane.
This entry has been updated (OED Third Edition, December 2007; most recently modified version published online March 2022).
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n.1875