Antonov An-990 -

The taxi test was a disaster. The weight of the central fuselage caused the asphalt of the taxiway to liquefy. The first and only "hop"—a 20-foot rise off the runway at 180 knots—reportedly shattered every window in the control tower and stripped the roof off a nearby maintenance shed due to the exhaust wake of the 14 engines. The aircraft landed immediately, its rear triple-fuselage joint cracked.