Comparison of crank based leg mechanism/extra simple walker

The "extra simple walker" based on http://www.instructables.com/id/Extra-simple-walking-mechanism/ is not relevant enough for its own wikipedia article. However: Being very simple makes it a good base line. The mechanism is by no means ideal, but it is possible to build a vehicle around it. The basic mechanism looks like this: The vehicle looks like this: So. lets look at the walking vehicle: The green base plate is going up and down a lot. It would be a very hard ride, just from the up and down. Not as easy to see is the speed variation: Now take a very close look at the animation: Gallery