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Quoth Overmod, speaking of the tests of the N&W J on the PRR: "Note that what failed at 115mph on the PRR test plant was the valve drive, and THAT was probably due to unbalanced forces on the valves -- poppets, for example, would have fixed the problem there, even if they introduced other issues elsewhere..." According to the N&W guy who was on the engine when it failed (the 610), the valve froze in the cage due to lubrication failure. When the engine was hauled back to Roanoke and the cylinders and valve chambers opened up, the liners were colored yellow. It was felt that some component of the PRR boiler water didn't agree with N&W lubricants. But there was no failure of the engine due to design or production problems. Mr. Big Ol' UP Man: If you would remove your head from your nether aperture, learn to read, and go through the literature you'd find some surprising (to you, anyway) data about the 2-6-6-6 and its comparison to the N&W 2-6-6-4. The data is out there; all you have to do is read it, and I'm not going to trouble this list with repeating it. I did ask you for some data to compare UP's performance with N&W's, but I see you'd rather blather than do the research - oh, I forgot - you'd have to learn to read. But I remain, Your buddy, the Redneck Hickabilly Trailer Trash Old Timer. Oh, yes - being president of the UP today is like being Emperor of the North Pole. But I guess you don't remember Lee Marvin and Ernest Borgnine, either . . .
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