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 - Talk of the Town: What's The "Stuckest" You've Ever Been? - by Edited by Kim Pratt. Another great discussion from the Tractor Talk Discussion Forum. The discussion started out with the following post: "I was about 14 (part of the problem) when I got stuck. I was disking with a cab equipped IH 966. The window was dirty and I was driving into the evening sun. It was hard to see and it was my first pass down the field. I got the tractor so stuck that the underside of the tractor was resting on the ground. My uncle wanted
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