what type of train is thomas the tank engine
Thomas the Tank Engine Thomas the Tank Engine is a fictional steam locomotive in The Railway Series books by the Reverend Wilbert Awdry and his son, Christopher. He became the most popular character in the series, and is the title character in the accompanying television spin-off series Thomas & Friends.
High-pressure steam locomotive Another way to avoid scaling in the HP boiler is to use steam alone to transfer the heat from the fire; steam cannot of course deposit scale. Saturated steam from an HP steam generator was pumped through HP superheater tubes which lined the firebox. There it was superheated to about 900 °F (482 °C) and the pressure raised to 1,700 psi (11.72 MPa). Only a quarter of this was fed to the HP cylinders; the rest was returned to the steam generator where its heat evaporated more water to continue the cycle.