Trevithick Dredger Engine at The London Science Museum
I landed at Heathrow at 6am, dropped my bags at the BNB, then caught 2 buses to the Science Museum. Not jet lagged, but on a high, to see the only intact Trevithick Dredger Engine known to exist.
The room which houses the Trevithick, also contains 4 large beam engines, a Parson’s turbine (of “Turbinia” fame), and a very large 2 cylinder compound.
Disconcertingly, the first atmospheric beam engine, with wooden beam, was partly obscured by a souvenir stall and racks of clothes for sale. WTF! Don’t they realise the historical importance and rarity of these engines. And 3 further moans, to get them out of the way. The descriptive labels on all items had minimal information. Nothing like dimensions, power, etc. The attendants knew virtually nothing about the engines. And often, items were behind glass or perspex which was reflective, and prevented good visualisation or photography. To be fair entrance was free, but to get past the entrance desk it seemed pretty clear that a “donation” of 5 pounds was expected, (which I was happy to contribute). Those complaints aside, I have to say that the collections were fabulous.
I could see the Trevithick at the far end of the room, so to curb my mounting excitement, I forced myself to not rush up to it, but to try to look at every exhibit on the way.
Eventually I was there and it was there in front of me.
The con rods, stands, standard cross tie, and chimney are not original, but were added when the engine was restored in ~1875. But that is now part of its history.
So there you are. Fascinating to me. Interesting enough I hope to you. I could see no evidence of wooden lagging at all, but i still intend to install some on my model to slightly improve its efficiency.
i have heaps more photos of other exhibits which I may post later.