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Rolobot is a cylindrical robot that doesn't use wheels and moving parts aren't exposed to regolith. There are 3 sections, the center tube (T), the storage compartment (C), and the caps (E). The storage compartment has a hatch (H) which scoops up regolith. The tube inside the compartment contains motor (M3) and a ballast which moves to tilt and turn Rolobot. Motors (M2) move the tube to rotate the hatch. Inside the caps are RTGs which provide power to the robot and turn the motors (M1) which shift the RTGs, and gravity will pull it down and roll the robot. The caps and center tubes are sealed from the storage compartment.