The Armstrong Whitworth AW.15 Atalanta was a four-engine airliner designed and produced by the British aircraft manufacturer Sir W.G. Armstrong Whitworth Aircraft Limited at Coventry. The Atalanta was specifically developed to fulfil the needs of the British airline Imperial Airways, who sought a new four-engined airliner to serve its African routes. A monoplane configuration was adopted largely due to its low drag qualities, which led to a substantially different configuration to that of the preceding Armstrong Whitworth Argosy airliner. Upon its review of Armstrong Whitworth's proposal, Imperial Airways opted to order it into production before a prototype had even been assembled, much less flown.