My local waterworks at Blagdon has a preserved Woolf Compound Rotative pumping engine, originally one of a pair requirings a specially built branch line to coal 4 Lancashire boilers, now gone. For resilience each engine and boiler pair were accommodated in separate buildings, both posh. The engine itself weighs 17 tons and produces 170HP from 4.5 tons of coal per day, with 2 or 3 men working round the clock. Taken together the installation looks massively powerful, and there are lots of polished metal moving parts, super paintwork, levers, dials, valves and catwalks.
Last time I visited they were swapping out one of the 3-phase motors that drives the modern pumping system, which is not an obvious feature of the site at all. I think it lives in a hole in the ground. The old motor was laid on the grass. Apart from the cooling fins and shaft it looked more like a medium sized oil-drum than a proper motor – a grey cylinder about 2 foot in diameter and bit under 3 foot long. Although the plate gave the output as 150kW, which is about 200HP, woof woof, it was totally charmless.
Modern stuff may be far more effective, but steam will always be drop-dead sexy. It looks good, smells good and by golly it does you good.
Dave