Sara Reardon, reporter
Don't stomp on this little robot - not yet, anyway. VELOCIRoACH, a small cardboard hexapod modelled on a cockroach, can run at 2.7 metres per second, placing it among the fastest robots in the world.
Boston Dynamics' LS3, which can trot at up to 3.2 m/s, still holds the speed record for a self-powered robot. VELOCIRoACH ties for second with the company's six-legged RHex. But VELOCIRoACH is by far the fastest for its size: in 1 second, it can skitter 26 times the length of its body.
Duncan Haldane at the University of California, Berkeley, presented VELOCIRoACH this week at the Society for Integrative and Comparative Biology meeting in San Francisco. To maximise the robot's speed, Haldane and colleagues studied the anatomy of a cockroach, which can run at 1.5 m/s, and scaled its body plan up to a workable size.
The secret to VELOCIRoACH's speed is its thin, C-shaped legs. They mimic a roach's legs by acting as springs as they hit the ground 15 times per second. To stay stable as it runs, the robot has three legs on the ground at all times, forming tripods. Its approach to obstacles mimics a roach's as well - rather than trying to avoid them, it runs into them head first, then pops up onto its end and goes over the top.
Elsewhere at the meeting, Nick Kohut, who works with Haldane, presented a similar robot with an added tail. By swinging its tail to the side, TAYLRoACH, which looks more like a lizard than a roach, can make a 90-degree turn in less than a quarter of a second without slowing down from a run.
Haldane says he's now working to improve VELOCIRoACH's body plan so it can withstand an indoor insect's most deadly nemesis: the human foot. The robot can already carry four times its body weight, but Haldane plans to design its materials to pop back up after being flattened. But despite being faster and stronger than a real roach, Haldane says it's unlikely that the robot would outdo its namesake by surviving a nuclear blast.