Robert Stephenson and Co: Planet
1831 Engine built by Robert Stephenson and Co for the Liverpool and Manchester Railway[1] or the Stockton and Darlington Railway. The engine driver was Joseph Gladdon. [2]
A working replica of Planet was completed in 1992 by the Friends of the Museum of Science and Industry in Manchester. It was aimed to follow the original design as far as was consistent with modern construction methods, materials, and safety standards. The boiler pressure was 100 psig rather than the original 50 psig, and the cylinder bore diameter was reduced from 11" to 8" to compensate. The inner and outer frames were interconnected to take the frame load through the frame rather than the boiler.[3]