The Planet and Samson Locomotives: Their Design and Development

Robert Stephenson's Planet class locomotive was the first true design of mainline express passenger locomotive. Delivered less than a year after Rocket it was one of the most successful early locomotive designs. Planet set the mold for British locomotive design for more than the next century featuring a multi tubular boiler; inside cylinders; crank axle; and the first use of proper frames. The Planet class, and its 0-4-0 Samson derivative, found use across Britain with examples being suppli...