Tackling the PR Challenge
The PR is not a difficult model to figure out. In the challenge, the pointers (two orange tips) will be pointing toward the right, and your robot must rotate the PR so that it points to the left. This will simulate redirecting the power obtained from the solar array (see Chapter 4) to Mars Base.
There is no danger to your robot from this device other than the possibility that it could get caught up in the structure. Notice also that there are two large rubber tires in front of the PR; should your robot bump into these, it is possible that the robot could be bumped off course or briefly caught, because the tire surface can be tacky and stick to plastic surfaces.
You will definitely want to take a measurement or two that ...
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