was contemporary to the Sopwith L.R.T.Tr. project, which never progressed beyond the prototype stage; Bruce speculated that Smith may have been inspired by the L.R.T.Tr.'s atypical wing configuration to adopt the iconic triplane configuration for the new project. Beyond the obvious difference in terms of wing configuration, the Triplane's design largely conformed with that of the Pup. It has been described as being a "remarkably simple aircraft". Into flight The initial "prototype of what was to be referred to simply as the Triplane" first flew on 28 May 1916, with Sopwith test pilot Harry Hawker at the controls. Within three minutes of takeoff, Hawker startled onlookers by looping the aircraft, serial N500, three times in succession. Hawker noted that this was due to his high confidence in the aircraft despite its radical design. The Triplane was very agile, with effective, well-harmonised controls. When maneuvering, however, the Triplane presented an unusual appearance. One observer noted that the aircraft looked like "a drunken flight of steps" when rolling. While initially lacking any armament, N500 was subsequently furnished with a single Vickers machine gun, which was mounted centrally in front of the cockpit. In July 1916, N500 was sent to Dunkirk for evaluation with "A" Naval Squadron, 1 Naval Wing. Being put into action within 15 minutes of its arrival to intercept enemy aircraft, N500 quickly proved to be highly successful. According to Bruce, it demonstrated exemplary maneuverability and a phenomenal rate of climb for the era. The second prototype, N504, performed its maiden flight in August 1916. Its primary difference from the first prototype was the installation of a 130 hp Clerget 9B engine. N504 was eventually dispatched to France in December of that year. This aircraft served as a conversion trainer for several squadrons. Production Between July 1916 and January 1917, the Admiralty issued two contracts to Sopwith for a total of 95 Triplanes, two contracts to Clayton & Shuttleworth Ltd. for a total of 46 aircraft, and one contract to Oakley & Co. Ltd. for 25 aircraft. Seeking modern aircraft for the Royal Flying Corps (RFC), the War Office also issued a contract to Clayton & Shuttleworth for 106 Triplanes. Quantity production of the type commenced in late 1916. The first Sopwith-built Triplanes were delivered to Clayton & Shuttleworth, who delivered their first Triplane on 2 December 1916. A renewed urgency amongst the Allied Powers for high performance combat aircraft