The high-pressure water-tube boiler of the experimental LNER W1 10000 Hush-Hush steam locomotive. Rated at 450 psi (3.10 MPa), the boiler has 2.5 times pressure than its contemporary, the Gresley A1.




Previously:

LNER A4 Mallard locomotive - photo
Portable straw-powered boiler - GIF and video
Steam cleaning the inside of a boiler - GIF