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6 comments:
And because most people don't know how locomotives go around corners (after all, solid axles and no steering wheel), here's my explanation :-
http://www.savory.de/blog_sep_09.htm#20090904
A real piece of history, and I've actually seen it sitting at Pomona... sigh
I saw 4012 decades ago, when Steamtown was in Vermont.
Having stood next to the tracks about 4 years ago when UP 844 steamed by, I find it impossible to comprehend just how big UP 4014 really is. 844 was impossibly huge...and 4014 is about 150% larger in most numbers.
How are they going to resolve that number problem? The last time that happened (844) they made the 4-8-4 8444 until they finally retired the Geep that was carrying 844. That might have been before they decided to have a steam program.
Now, one might think they'd honor their heritage and keep 4014 on the Big Boy and give the SD70 something else. What are the rules for road numbers, and who makes them?
LRod
ZJX, ORD, ZAU retired
Ole Phat Stu's right, with a couple of additions:
On larger engines with 4 or more driver sets, one set is usually "blind", with no flange. That makes a slightly smaller radius possible.
In articulated engines, with two sets of drivers and pistons, one set is hinged to the other. As the engine goes around a sharp curve, you can see the front end of the boiler swing way out over the outside rail.
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