May 10, 2011
Pulling an all-nighter and then some, the Cornell robot Ranger set a new world record May 2 by walking 40.5 miles on a single battery charge without stopping or being touched.
Ranger, built and programmed in the Biorobotics and Locomotion lab led by Andy Ruina, professor of mechanical and aerospace engineering, started on the Barton Hall track just after 2 p.m. May 1 and came to an abrupt stop at 9 p.m. May 2 after 30 hours, 49 minutes and 2 seconds of nonstop walking. It covered the 307.75 laps (0.13 miles per lap) at a 1.3 mph amble.
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