Steam locomotive Brunton's Steam Engine "Walking"

"Mechanical Traveler", also known as "Walking Steam Locomotive", also known as "Steam horse" — this was the name of one of the designs that preceded the classic steam locomotive.

In 1813 the English engineer William Brunton patented his invention (patent № 3700), and soon a steam locomotive was built at the Butterley Company factories (Derbyshire), where the inventor worked. The inventor attempted to compensate for the lack of adhesion of smooth wheels to the rails by using two mechanical "legs" — special supports with flexible joints that alternately clung to the track and, like two boat hooks, pushed the locomotive forward.

As a result of testing, Brunton's "Mechanical Traveler" design was not useful, since towing or breaking the adhesion between the wheels and the rails was avoided by achieving sufficient adhesion weight. In other words, the sum of the masses that falls on each driving wheel of the locomotive.