Boeing Truss-Braced Wing

SUGAR Volt is the hybrid aircraft concept proposed by a team led by Boeing's Research & Technology division.

It is proposed that SUGAR Volt would use two hybrid turbofans that burn conventional jet fuel when taking off, then use electric motors to power the engines while flying.

Relying partly on electric power might reduce specific fuel consumption (SFC) compared to a standard turbine-only design (turbofan or lower-consumption turboprops).

SUGAR Volt is designed with a long, braced, high aspect ratio wing that decreases induced drag due to lift.

Using a shortened MD-90 airframe, a full-scale Sustainable Flight Demonstrator (SFD), designated X-66A,[1][2] should fly in 2028, outlining a possible family of 130-to-210-seat aircraft.