Waverley is powered by her remarkable triple expansion steam engine which delivers 2,100 horsepower. Steam is produced in two boilers by burning marine gas oil (similar to diesel). Steam passes from the boilers to the engine and expands through three cylinders of increasing size – high pressure, medium pressure, and low pressure – extracting energy at each stage. This step-by-step expansion makes the engine more efficient. Each cylinder drives a piston, which moves up and down, turning the massi

The mighty Sir William Prescott engine is the world’s largest working triple-expansion steam engine. For over half a century it pumped 19 million gallons of water every day for the people of London. You can see it in action at our next steaming weekend on the 18th & 19th May. #steam #steamengines #massive #massiveengineering #london #hiddenlondon #museum #vintage #heritage #titanic | Kempton Steam Museum