Railroad locomotives using both steam and gas turbines have been built and tested but both were considered unsatisfactory.
Gas turbines move huge amounts of air which must exhaust to the atmosphere. One of the unacceptable issues with the UP turbine locomotives was damate (and potential liability) caused by the high velocity and high volume of hot exhaust gasses.
Experiments with steam turbines were performed in the late 1940s through the late 1950s by the PRR, N&W and C&O in conjunction with GE and Westinghouse. Reliability was an issue at that time but modern technology should easily deal with such issues. Of course, it is highly unlikely that this technology will be again considered for rail traction because steam generation requires lots of water and the railroads removed all watering infrastructure decades ago.
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Today's Featured Article - Oil Bath Air Filters - by Chris Pratt. Some of us grew up thinking that an air filter was a paper thing that allowed air to pass while trapping dirt particles of a particles of a certain size. What a surprise to open up your first old tractor's air filter case and find a can that appears to be filled with the scrap metal swept from around a machine shop metal lathe. To top that off, you have a cup with oil in it ("why would you want to lubricate your carburetor?"). On closer examination (and some reading in a AC D-14 service manual), I found out that this is a pretty ingenious method of cleaning the air in the tractor's intake tract.
... [Read Article]
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