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A high-pressure steam locomotive is a steam locomotive with a boiler that operates at pressures well above what would be considered normal for other locomotives. Most locomotives operate with a steam pressure of 200 to 300 psi (1.38 to 2.07 MPa). [1] In the later years of steam, boiler pressures were typically 200 to 250 psi (1.38 to 1.72 MPa).
The Lancashire and Yorkshire Railway (L&YR) Class 7 was a class of Atlantic passenger steam locomotives to the design of John Aspinall. Forty were built between 1899 and 1902. They were known as "High-Flyers" as a result of having a high-pitched boiler that was supposed to increase stability at speed.
Union Pacific 4014 is a preserved 4884-1 class 4-8-8-4 "Big Boy" type steam locomotive owned and operated by the Union Pacific (UP) as part of its heritage fleet.Built in November 1941 by American Locomotive Company (ALCO) in Schenectady, New York, it was assigned to haul heavy freight trains in the Wasatch mountain range.
The DRG H 02 1001 was a high-pressure steam locomotive built by the engineering firm of Berliner Maschinenbau (formerly L. Schwarzkopff) to the design of Dr L. Löffler. [1] The aim was not only to improve fuel economy—the usual reason for adopting high steam pressures—but also to increase the amount of power that could be produced within ...
Superheated steam was widely used in main line steam locomotives. Saturated steam has three main disadvantages in a steam engine: it contains small droplets of water which have to be periodically drained from the cylinders; being precisely at the boiling point of water for the boiler pressure in use, it inevitably condenses to some extent in the steam pipes and cylinders outside the boiler ...
The Midland Railway 2000 Class was a class of 40 0-6-4T steam locomotives designed by Richard Deeley.They were known as "flatirons" or "hole-in-the-wall tanks" because of their distinctive shape; their side tanks extended to the front of the smokebox and they had a distinct cut-out in the side tanks to access the motion.
Two of the 0-6-0 locomotives built in 1906, nos. 898 and 900, were the first British locomotives to be provided with Schmidt superheaters when new, the purpose being to increase the temperature of steam produced in the boiler so the minimum of energy was lost. After months of trials, 20 further locomotives with the Schmidt superheater were ...
A steam locomotive operating at 350 psi (2,400 kPa) would have a temperature of about 220 °C (400 °F), and a specific enthalpy of 960 kJ/kg (440 kJ/lb). [6] Since standard pressure saturated water has a specific enthalpy of just 420 kJ/kg (190 kJ/lb), [ 7 ] the difference between the two specific enthalpies, 540 kJ/kg (240 kJ/lb), is the ...