Boeing’s SUGAR Freeze plane concept runs on cryogenically frozen liquid natural gas

Come 2045, we might just be flying around in planes powered by cryogenically frozen liquid natural gas. Boeing has unveiled a new NASA-commissioned concept called the SUGAR Freeze — SUGAR stands for Subsonic Ultra Green Aircraft Research — that runs on liquid natural gas (LNG) and burns significantly less fuel than current planes. It’s based on an earlier concept called the SUGAR High, which was designed to show what an aircraft might look like in 2030. The original High design was a 154-seat plane that had a long span, strut-braced wing to improve aerodynamic efficiency, and the Freeze is largely the same — the difference is that it features new engine technology that runs on LNG, as well as two tanks at the front and rear to hold…
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