Security ... think about it!
Undaunted, Shawyer is moving forward with his plan to build an unmanned demonstration vehicle, defying gravity thanks to four of his Emdrives. Shawyer says those four modules will silently lift the 1000-pound vehicle, and it'll be propelled forward with jet engines, reaching a speed of 230 knots. This tech could also have scary military implications, allowing weapons to be launched with no exhaust plume, making them undetectable. In 10 years the scientist wants to build a space plane that can make the 10,000 mile trip from London to Sydney in under three hours, or take 40 tons of cargo to the moon in four days.