Boy oh Boy. This is a good one. Checked several dynamic sites and boiler groups, and TRAINS magazine site. General opinion is steam engine will maitain its efficiency at low or high. When the atmosphere is too thin for good complete combustion, that is when they start to loose. Diesels are a whole different kettle of fish. Yes the higher they go they start to starve. They need turbos just to get up there. In really high railroads like in South AmericA the diesel engines needed to be pushed by the old steam locomotives just to move a few cars. After the design engineering people really put some big equipment on the front of those diesels did they get some performance out of them. Same as WWII with super high altitude fighters and bombers. With out superchargers they were worthless low level escorts. On this subject go on line and do some reading. Lots of yes and no and what if.
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Today's Featured Article - Chores - by Frank Young. The ceaseless passing of time! It is at once our friend and our enemy. It measures our progress and it makes us old. Like most features of our life, few things are all good or all bad, and most such judgments depend on our own perspective or viewpoint. In our particular hobby, we enjoy the nostalgic return to the days of our youth as we recreate many of the scenes that took place on the family farm that served as the stage for the first few acts of the play that is our live
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