The Sopwith Camel is a British First World War-era single-seat biplane fighter aircraft that was introduced on the Western Front in 1917. It was developed by the Sopwith Aviation Company as a successor to the Sopwith Pup and became one of the best known fighter aircraft of the Great War.
The Camel was powered by a single rotary engine and was armed with twin synchronized Vickers machine guns. Though difficult to handle, it was highly manoeuvrable in the hands of an experienced pilot, a vital attribute in the relatively low-speed, low-altitude dogfights of the era. In total, Camel pilots have been credited with downing 1,294 enemy aircraft, more than any other Allied fighter of the conflict. Towards the end of the First World War, the type also saw use as a ground-attack aircraft, partly because the capabilities of fighter aircraft on both sides had advanced rapidly and left the Camel somewhat outclassed.
The main variant of the Camel was designated as the F.1. Other variants included the 2F.1 Ship's Camel, which operated from aircraft carriers; the Comic night fighter variant; and the T.F.1, a "trench fighter" armoured for attacks on heavily defended ground targets. A two-seat variant served as a trainer. The last Camels were withdrawn from RAF service in January 1920.
When it became clear the Sopwith Pup was no match for the newer German fighters such as the Albatros D.III, the Camel was developed to replace it, as well as the Nieuport 17s that had been purchased from the French as an interim measure. It was recognised that the new fighter needed to be faster and have a heavier armament. The design effort to produce this successor, initially designated as the Sopwith F.1, was headed by Sopwith's chief designer, Herbert Smith.
Early in its development, the Camel was simply referred to as the "Big Pup". A metal fairing over the gun breeches, intended to protect the guns from freezing at altitude, created a "hump" that led pilots to call the aircraft "Camel", although this name was never used officially.