コアンダ効果
An unusual design feature of the An-74 (as well as An-72) is the use of the Coandă effect to improve STOL performance, utilizing engine exhaust gases blown over the wing's upper surface to boost lift. The powerplant used is the Lotarev D-36 turbofan engine. The An-74 bears some resemblance to the unsuccessful Boeing YC-14, a prototype design from the early 1970s which had also used overwing engines and the Coandă effect.