How much horsepower does a diesel train engine have?
Elements of the diesel locomotiveThe diesel engine may operate on the two-stroke or four-stroke cycle. Rated operating speeds vary from 350 to 2,000 revolutions per minute, and rated output may be from 10 to 4,000 horsepower.
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Most yard-switching and short-haul locomotives are equipped with diesel engines ranging from 600 to 1,800 horsepower; road units commonly have engines ranging from 2,000 to 4,000 horsepower.
The locomotives weigh between 100 and 200 tons (91,000 and 181,000 kilograms) and are designed to tow passenger-train cars at speeds of up to 125 miles per hour (200 kph). Siemens' modern engines produce up to 4,200 horsepower, and the generator can turn this into almost 4,700 amps of electrical current.
Similarly, a typical train might haul 3,000 tons of freight 500 miles and consume approximately 2,885 gallons of diesel fuel. The efficiency of this freight haul would be calculated as: (3000 tons x 500 miles) / (2,885 gallons) = 520 ton-miles per gallon.
High-speed trains can generally reach 300–350 km/h (190–220 mph). On mixed-use HSR lines, passenger train service can attain peak speeds of 200–250 km/h (120–160 mph).
Rather, the term is more specific: A freight train can move one ton of weight about 450 miles on a single gallon of gas. To match this mileage, a one-ton car would have to get 450 mpg, and a two-ton vehicle would have to get 225 mpg. To car owners, this seems unbelievable. How can railroads do it?
Mechanical transmission is the simplest type; it is mainly used in very low-power switching locomotives and in low-power diesel railcars. Basically it is a clutch and gearbox similar to those used in automobiles. A hydraulic coupling, in some cases, is used in place of a friction clutch.
Power plant capacity is far greater than any individual locomotive uses, so electric locomotives can have a higher power output than diesel locomotives and they can produce even higher short-term surge power for fast acceleration. Electric locomotives are ideal for commuter rail service with frequent stops.
Modern locomotives use electric traction instead of gears as electric traction is much more flexible than gears. Diesel fuels generators from the combustion engine and transform the energy using an alternator, which runs the traction motors.
Biodiesel & Renewable Fuels: Traditionally, locomotives have run on petroleum diesel fuel, but railroads are now using renewable diesel and biodiesel blends to power them. Both renewable diesel and biodiesel are made from renewable energy sources and don't rely on fossil fuels.
Modern electric and diesel-electric locomotives can go in either direction. Their wheels are designed with traction motors to allow forward, backward, or to stay neutral. As a fail-safe, the reverser key is removable, once removed the train will not run.
Another reason why railroad transport is better than road travel is the fuel efficiency they offer compared to hiring vehicles. Railways can consume up to nine times less fuel for every ton they carry for a kilometer, making trucks fuel inefficient compared to railroad transport.
A foundation of Einstein's Theory of Special Relativity is that nothing can travel faster than the speed of light in a vacuum; this is the effective speed limit for the Universe!
The Glacier Express is the world's slowest train, taking more than eight hours to travel between Zermatt and St. Moritz in Switzerland at an average of 18mph. Along the way, it passes over nearly 300 bridges, travels through 91 tunnels and takes in endless stunning Alpine views.