The Armstrong Whitworth Argosy was a three-engine biplane airliner designed and produced by the British aircraft manufacturer Armstrong Whitworth Aircraft. It was the company's first airliner. The Argosy was developed during the early-to-mid 1920s in response to a statement by Imperial Airways that new multi-engined airliners were being sought to replace its single-engined counterparts then in use. Armstrong Whitworth proposed a relatively large biplane airliner, powered by three Armstrong Siddeley Jaguar engines; its construction largely composed of plywood and fabric supported by steel tubing. Imperial Airways opted to initially order a pair of aircraft to serve its European routes, while the Air Ministry ordered a single example as well. On 16 March 1926, the first Argosy, G-EBLF, performed its maiden flight. Following the delivery of the second aircraft to Imperial Airways, the Argosy performed its first passenger flight on 16 July 1926, flying from London to Paris. Using the type, Imperial Airways inaugurated the world's first named air service, the luxury 'Silver Wing' service, between these two cities. The type would be operated by the airline for nine years, during which time a total of three Argosies would be lost in accidents, although only one of these resulted in fatalities. In addition to Imperial Airways. During 1935, Imperial Airways opted to retire all remaining aircraft in favour of the next generation of airliners, which were larger and equipped with four-engines instead. All operators had withdrawn the type by the end of 1936. Design and development Background The origins of the A.W.154 Argosy can be heavily attributed to the release of a specification by the British airline Imperial Airways in 1922. This specification sought a new airliner to serve on its Middle East routes, amongst the requirements listed was a range of 500 miles, even when flown into a headwind of 30 mph, as well as stipulating the use of multiple air-cooled engines; the airline would subsequently declare a policy for all its airliners to be multi-engine on the grounds of safety. In order to achieve this, Imperial Airways would need to procure replacement aircraft for much of its fleet, which largely consisted of aging single-engine de Havilland-built aircraft which Imperial Airways had inherited from its constituent companies, such as Daimler Airway. Although the company had no prior experience of designing airliners, Armstrong Whitworth decided that it would respond with its own proposal. It was a relatively large biplane, possessing an