1968 – Iron Mule Train – R. A. Morrison (American)

Although referred to as the "Iron Mule Train", only one carriage was built for test purposes. I believe it was Frank Tinsley's original idea in extending Space General's original Moonwalker that inspired Morrison into promoting this third variant (the other being the Moonwalker disability walker after NASA's cancellation of the earlier unmanned moon rover programme.)  …

1961 – Iron Mule Train (Concept) – Frank Tinsley (American)

Although published in 1962, the illustration is dated 1961. Frank Tinsley's concept pre-dates A. J. Morrison's "Iron Mule Train" by about 7 years. Given the cancelled Space programme for an un-manned lunar misssion, I wouldn't be surprised that Tinsley's concept inspired Morrison in resurrecting the Moonwalker project (having already had a second life as a Disability walker) …

1961 – Moonwalker Lunar Rover – Space General Corp. (American)

Space General designers have built an insect-like vehicle with six legs, two arms, a triangular body, a solar-cell panel, and an antenna. The left arm, ending in a claw, picks up objects to examine. The right one holds a TV camera to do the looking – and to see where the vehicle is walking. This …

1940 – Walking SuperTank – Hutchinson and Smith (British)

This demonstration model was remotely controlled by means of flexible cables: the operator used one limb to control each leg.  The British firm W. H. Allen & Company, with A. C. Hutchinson and F. S. Smith, designed the first military related walking machine in 1940. The proposed armoured fighting machine in a partly engineered state. …

1957-60 – Walking Machine(s) – Joseph Shigley (American)

There are at least two variations of the walking machines attributed to Prof. Joseph E. Shigley, then from the University of Michigan.  The first relates to the pantograph leg with some descriptions suggesting up to 16 legs were to be used – 4 gangs of 4 legs so a leg was on the ground at any …