Models built for the 'Walking Models' Secretary's Challenge
This challenge was to build a 'walking' model - not so easy!
There have, however, been quite a number of walking models published, including an impressive-looking 8-set model in the 1950 manual (an earlier version is also in a pre-war manual) and various models by Andreas Konkoly, including a Centipede, one version of which is powered by a Magic Motor.
There have also been attempts at some 'serious' walkers - I remember a 4-legged machine in the Meccanoman's Newsmag and a 2-legged one in a recent Constructor Quarterly.
Then there are the Meccanoids - nice models, but Bert Love was very critical of them. He thought that the gearing was wrong and that the feet were badly designed. He wrote an article on them - was it in an early Constructor Quarterly? -showing one of them rebuilt.
I suspect that the problem with a Walking Machine will be setting it up.