The Sopwith Triplane was a British single seat fighter aircraft designed and manufactured by the Sopwith Aviation Company during the First World War. It has the distinction of being the first military triplane to see operational service. The Triplane was developed by the firm's experimental department as a private venture, the project was headed by the designer Herbert Smith. Aside from its obvious difference in wing configuration, the aircraft shared many similarities with the company's successful biplane fighter, the Sopwith Pup. The prototype Triplane performed its maiden flight on 28 May 1916 and was dispatched to the French theatre two months later, where it garnered high praise for its exceptional rate of climb and high manoeuvrability. During late 1916, quantity production of the type commenced in response to orders received from the Admiralty. During early 1917, production examples of the Triplane arrived with Royal Naval Air Service squadrons. The Triplane rapidly proved to be capable of outstanding agility, and thus was quickly deemed to be a success amongst those squadrons that flew it. Praise for the type extended to opposing pilots; Imperial Germany extensively studied the Triplane via captured examples and produced numerous tri-winged aircraft shortly thereafter. Nevertheless, the Triplane was built in comparatively small numbers to that of the more conventional Sopwith Pup. It had been decided to withdraw the Triplane from active service as increasing numbers of the Sopwith Camel arrived in the latter half of 1917. Surviving Triplanes continued to serve as operational trainers and experimental aircraft until months following the end of the conflict. Development Background During the First World War, the Sopwith Aviation Company became a prominent British manufacturer of military aircraft. It was amid this conflict that one of its employees, Herbert Smith, designed the Sopwith Pup, a single-seat biplane fighter aircraft which was described by aviation author J.M. Bruce as being "one of the world's greatest aeroplanes". While it was a capable fighter that possessed impressive handling qualities for its era, from an aerodynamic perspective, the Pup was an entirely conventional design. Certain figures, including those within Sopwith's experimental department, sought to develop a successor which would instead pioneer new concepts for such an aircraft; out of such ambitions would emerge the Triplane. Early on, Sopwith decided to pursue development of the Triplane concept as a private venture initiative. The design, which was passed by the company's experimental department on 28 May 1916,