StoneRoad2013's photos with the keyword: pump

Originally, HMS Unicorn would have had a chain pump [basically an endless chain of narrow buckets] running from a sump [lowest point] in bilges, alongside the keel. The scooped up water is discharged over the side. One of the morning routines for the crew of the ship would be to "pump the bilges" - despite the tar & cotton caulking used to seal the seams between the planks, all wooden ships leak to some extent or other, and the water ends up in the bilges ... These days, Unicorn has a modern electric pump, operated by a float switch to cope with incoming water.

1924 built 7hp "National Gas Engine" {No. PP1667} Demonstration - using belt drive to power a pump [got the image angle a bit wrong, so cut off the edge of the pump]. The engine runs on Petrol / Paraffin.

This was running on compressed air during our visit. Majestic ! Built in 1893 as the second or south engine at Addington [Croydon] by Glenfield & Kennedy of Kilmarnock, as a mirrored pair to the original Easton, Anderson & Goolden {sp ?}. Pumping capacity 1.5 million gallons of water a day at 72 gallons per stroke, using 4 tons of coal. The engine weighs 100 tons, the flywheel is 18ft in diameter. Donated by Thames Water, which was arranged by the late George Rickard [the driver at Addington] who restarted it after installation at Strumpshaw. His family still maintain and run the engine.