Here is another robot that can climb steep slopes and grip onto rough surfaces. The T-RHex has microspines on its feet to grip onto bricks, concrete, and other surfaces. It can hang from vertical walls. As the researchers explain:
The microspines are embedded in 3D printed “toes,” which are in turn glued into laser-cut acrylic leg slices. Each slice is stacked into a fwheg, or forked wheel leg. The body of the robot is bent aluminum sheet, and it includes a hot-formed acrylic tail which we developed to assist in climbing. Each leg is actuated by a Dynamixel MX-64 servo motor, and the tail is actuated by a Dynamixel MX-106.
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