While the average car engine has about 200 horsepower, locomotive engines typically range from 2,000 to 4,500 horsepower.
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Traction. Traction when going around turns is not an issue because train wheels have flanges (projecting rims around the wheels) that keep them on the track. But traction when braking and accelerating is an issue. A locomotive can generate more than 60,000 lb-ft of torque.
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.
While the average car engine has about 200 horsepower, locomotive engines typically range from 2,000 to 4,500 horsepower. Train operators rely on diesel power across the full range of rail power applications.
Federal regulators limit the speed of trains with respect to the signaling method used. Passenger trains are limited to 59 mph and freight trains to 49 mph on track without block signal systems. (See dark territory.)
The most powerful locomotive engines (up to 4,500 horsepower) are primarily used for long distance freight train operations by America's five Class I railroads, short haul operators, and AMTRAK passenger rail locomotives.
The train travels at 40 mph. In one hour, it will travel 40 miles and consume 310 gallons of diesel fuel between the three locomotives, or 7.75 gallons for every mile. That's about 0.13 miles per gallon, hardly 400 miles per gallon.
The train travels at 40 mph. In one hour, it will travel 40 miles and consume 310 gallons of diesel fuel between the three locomotives, or 7.75 gallons for every mile. That's about 0.13 miles per gallon, hardly 400 miles per gallon.
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 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.
The mechanism of an emergency brake may differ, depending on railcar design. Emergency-braking a train (without track brakes) will give about 1.5 m/s2 (0.15 g) deceleration. The braking distance will be approximately 250 m (820 ft) at 100 km/h (62 mph) and 600 m (2,000 ft) at 160 km/h (99 mph).
Some locomotives collect electricity from overhead cables, while others take power from a third “live” rail on the track. It is very expensive to build the lines or rails that carry the electric current, but electric locomotives are cleaner, quieter, faster, and more reliable than steam or diesel engines.
Union Pacific reached out to EMD for more power, and the result was the behemoth EMD DDA40X. Often cited as both the largest and most powerful diesel-electric locomotive ever built, the 98-foot, 5-inch, 475,830-pound machine is staggering. The prime movers are a pair of EMD 16-645E3A diesels.
The Yellowstone was the largest steam locomotive ever built.While the Big Boy might claim the title of largest operating steam locomotive, the Yellowstone tops it in terms of weight. Relatively few Yellowstone locomotives were manufactured: only 72 in total, which were divided into five different classes.
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.