The overriding technical challenge of operating a rover near the Moon's equator is the intense, prolonged heat produced by solar radiation and the hot regolith over which the rover travels. All powered equipment inside the robot generates its own heat as well, which must be routed to the radiator for release into space. In the photo below, the team has a key composite part sealed in vacuum to achieve better bonding of the layers. This part, the motor strap, connects the heat-generating 28v brushless motor to other high-conductivity composite straps leading up to the radiator.

The schematic below shows where the motor strap fits into the design of one of the two drive motors, mounted in the "shoulder" of the robot. The motors power chain drives on either side of the robot that connect to the wheels. The rover steers by driving the two sides at different speeds, or reversing one side to turn in place.