Editing Robot locomotion (section)

===Rolling===
In terms of energy efficiency on hard, flat surfaces, wheeled robots are the most efficient. This is because an ideal, non-deformable rolling (but not slipping) wheel loses no energy. This is in contrast to [[legged robot]]s which suffer an impact with the ground at [[Heel strike (gait)|heel strike]] and lose energy as a result.[[Image:Segway 01.JPG|thumb|right|[[Segway PT|Segway]] in the Robot museum in [[Nagoya]]]]
For simplicity, most mobile robots have four [[wheel]]s or a number of [[continuous track]]s. Some researchers have tried to create more complex wheeled robots with only one or two wheels. These can have certain advantages such as greater efficiency and reduced parts, as well as allowing a robot to navigate in confined places that a four-wheeled robot would not be able to.

Examples:
[[Boe-Bot]],
[[Cosmobot]],
[[Elmer (robot)|Elmer]],
[[Elsie (robot)|Elsie]],
[[Enon (robot)|Enon]],
[[HERO (robot)|HERO]],
[[IRobot Create]],
[[iRobot]]'s Roomba,
[[Johns Hopkins Beast]],
[[Land Walker]],
[[Modulus robot]],
[[Musa (robot)|Musa]],
[[Omnibot]],
[[PaPeRo]],
[[Phobot]],
[[Pocketdelta robot]],
[[Push the Talking Trash Can]],
[[RB5X]],
[[Rovio (robot)|Rovio]],
[[Seropi]],
[[Shakey the robot]],
[[Sony Rolly]],
[[Spykee]],
[[TiLR]],
[[Topo (robot)|Topo]],
[[TR Araña]], and
[[Wakamaru]].