: an airplane with three main supporting surfaces superposed
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Design, safety, and range Matrix uses a lift-and-cruise compound wing design with a triplane layout and a six-arm structure.—Aamir Khollam, Interesting Engineering, 6 Feb. 2026 Towards the nose, there's a front triplane wing, and a large S-duct with adaptive flaps built into the carbon fiber front hood to help things along.—New Atlas, 18 Oct. 2024 Exhibits include fi rearms, artillery pieces, uniforms, armored vehicles, and even a Fokker triplane.—Smithsonian, 26 May 2017