Now that you’ve built Bobo, run a few test with it. Did you notice
some of the things that make Bobo a good design? Did you notice some
of Bobo’s disadvantages? Bobo doesn’t always go straight.
Sometimes Bobo seems to go too slowly. Well, if speed and stability
are more important than maneuverability or the ability to change modules
on the fly, then we’ll teach you how to make your second robot,
Roger. Roger was designed to be more stable than Bobo. Roger was also
designed to have a little more speed. You want to watch out, however:
sometimes Roger can go too fast for its sensors. Roger would be a good
choice in games where agility isn’t as important as stability.
Roger is based on a 4-wheel drive design. This makes it able to follow
a straight line. However, because of the stable 4-wheel design, Roger
doesn’t turn as quickly as Bobo.