The Royal Naval Air Service (RNAS) found interest in this newer dedicated Sopwith military development and procured the type in number with deliveries beginning in February of 1916. Requiring a steady stable of airplanes all its own, the Royal Flying Corps (RFC) joined in procurement of the type, eventually fielding it across nine complete squadrons - No. 37, No. 39, No. 43 (bomber), No. 44, No. 45 (bomber), No. 46, No. 70 (bomber), No. 78 and No. 143. RNAS No. 5 Wing, operating in France, became the first 1-1/2 Strutter squadron in April of 1916. The 1-1/2 Strutter was eventually in such great demand that other British concerns were charged with its production and license manufacture was also handled overseas in factories across France and Imperial Russia. The aircraft would prove to be a commercial success for Sopwith in that operators ultimately spanned the globe in wartime and post-war use - Afghanistan, Australia, Belgium, Brazil, Estonia, France, Greece, Japan, Latvia, Lithuania, Mexico, Netherlands, Poland, Romania, Russia (then later as the Soviet Union), Ukraine, the United Kingdom and the United States. For the United States, the 1-1/2 Strutter stocked the inventories of its US Signal Corps, the United States Navy and the American Expeditionary Force (the latter in action across Europe during World War 1). Civilian use extended to Argentina, France, Japan, Sweden, Switzerland and the United Kingdom.
In practice, the 1-1/2 Strutter compared favorably to the offerings of the Imperial German and Austro-Hungarian air services of the time. The type was utilized initially as a bomber escort and became an effective scout platform all its own. When armed with conventional drop ordnance, the 1-1/2 Strutter proved equally effective as a light two-man bomber. The fuselage eventually came in two flavors for its required roles - produced in twin-seat and single-seat fuselage forms. In 1916, the original Vickers-Challenger interrupter gear was replaced by the more effective Scarff-Dobovsky system. When utilizing a two-man crew, the aircraft was a capable "fighting scout" and benefitted from the "two heads are better than one" mentality. In its single-seat form, construction was simplified and the aircraft lightened to an extent, though more responsibility fell to the single operator now. Within time, a dedicated night-fighter form emerged to combat German incursions over British soil after dark and made up a critical portion of homeland defense squadrons.
Production of 1-1/2 Strutters included 1,439 built for British forces and an additional 4,200 to 4,500 examples built in France brining the combined reported total to nearly 6,000 units.
While quickly brought about to fight in a frontline role, the 1-1/2 Strutter suffered the fate of many-a-World War 1 aircraft - the evolution of technology in the period often led to once-proud mounts being quickly outmoded by arriving enemy designs. 1-1/2 Strutters were superseded by Sopwith Pups and Triplanes beginning to come online throughout 1916 and Strutters were therefore pressed into second-line roles thereafter. All of these designs eventually laid the groundwork for the war-winning Sopwith Camel of mid-1917. 1-1/2 Strutters proved a modest ace-maker as well, Englishman Geoffrey Cock leading the way with 13 confirmed kills.
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