The Short SB.4 Sherpa was an experimental aircraft designed and produced by the British aircraft manufacturer Short Brothers. Only a single example was ever produced. The Sherpa was developed during the 1950s for the purpose of testing a novel wing design, referred to as an . It was believed that this wing design could possess favourable qualities for producing tailless aircraft, and that the Sherpa would validate the characteristics of the wing for such aircraft to be produced in the future. While such a wing had been flown on the earlier Short SB.1, an unpowered glider, it was deemed valuable to use a powered aircraft instead. The design of the Sherpa is largely based upon that of the SB.1, to the extent that it incorporated numerous elements of this aircraft.