MIT developed a two-legged planar running machine called Planar Biped. It has a flexible body, uses single-legged algorithms and is used to study movements on rough topography.
Developed at the Delft University of Technology, Phides is a 2D running robot with actuated knees and hips that are connected to a boom construction. Phides has achieved a successful flight phase, which is a phase in a running stride wherein the feet…
Less sophisticated than the Spring Flamingo, Spring Turkey was mothballed in 1996. The planar bipedal robot had an un-actuated boom to prevent roll and lateral movement.