The Biggest Operating Rotative Beam Steam Engine at Crossness

Crossness Pumping Station at east London ( ) near river Thames contains four big sewage pumping engines, one of them Prince Consort restored to working condition. Besides their pure size length overall approximately 68 ft (20. 4 mtrs) and height 72 ft (22 mtrs) they show two features of special interests: grasshopper counter beam and Corliss valve gear. The engines are threecylinder triple expansion engines upgraded from single cylinder Watt engines (1865) in 189