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Just when I was all sure of myself being able to identify MOST locomotives by sight, this happens. While down at the U.P. yard today here in Salina, KS (which when I think about it, has quite alot to offer - street running, a turntable that's used every day, cabooses, & lot's of varied power-everything from GP7's & U-Boats to SD90MAC's & AC600CTE's)I spied a lash-up of what I thought was a SD40-2 & a SD45-2. But upon closer inspection I found that I was half right. The SD40-2 was indeed that but with a R designator (SD40-2R).The SD45-2 proclaimed itself to ALSO be a SD40-2 even though it had the (I thought) immistakable flaired air intakes of a SD45-2 (not counting the new SD70's). So after ALL THAT, my questions are: a. What does the R denote? b. What's up with a SD40-2 looking like a SD45-2? The road #'s by the way were U.P. 3559(SD40-2R) & U.P. 4736(SD40-2). I looked up 4736 on U.P.'s locomotive roster at their web-site & it says 4736 is indeed a SD40-2. Can someone PLEASE help!!??? Most confused in Kansas, Matt
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