A steam diesel hybrid locomotive is a railway locomotive with a piston engine which could run on either steam from a boiler or diesel fuel.
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It is fuelled by burning combustible material (usually coal, oil or, rarely, wood) to heat water in the locomotive's boiler to the point where it becomes gaseous and its volume increases 1,700 times.
The diesel engine drives an alternator, which produces electricity to run electric motors mounted on the locomotive's axles. The internal combustion engine was a dramatic improvement in efficiency over the steam locomotive, making substantial savings possible in maintenance and the elimination of widespread facilities.
There the economic edge ended, however, as diesels were far cheaper to operate. Fuel costs were less, for openers, but that was just the beginning. Typically, steam spent far too little time on the road and far too much in the shops and engine terminals being serviced and inspected.
Steam locomotives are no longer used to transport passengers or products because electric and diesel locomotives are faster, more efficient, and easier to maintain. The locomotives that are still running are a piece of history dating back to the 1800's that really put into perspective just how far we've come!
Each motor drives a small gear, which meshes with a larger gear on the axle shaft. This provides the gear reduction that allows the motor to drive the train at speeds of up to 125 mph. Each motor can weigh over 6,600 pounds (3,100 kilograms) and draw more than 700 amps of electrical current.
Diesel engines are much more efficient than steam engines, but the combustion in the steam engine's firebox can be more carefully controlled and, so, possibly produce less of the types of pollution caused by imperfect combustion.
Normal Operating Power for the steam engines was about 1700 Hp per shaft, 3400 Hp total. Max Power output of the engines was about 2500 Hp per shaft, 5000 Hp total.
The Flying ScotsmanBuilt in 1922, Flying Scotsman has been described as the world's most famous steam locomotive. Since it was first built, few parts of the locomotive have survived as many of its components have been renewed and replaced several times over.