HollySugarSW1 Wrote:
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> First, I did NOT claim "the 4014 could operate
> anywhere on the UP". I stated "No problem
> operating on any UP mainlines."

And, of course you were STILL WRONG!


I'm sure there
> are many non-mainline tracks the UP would not run
> the 4014.

OK, now you are dealing in semantics, as you previously stated that "No problem operating on any UP mainlines.", which is STILL wrong, as previously pointed out, i.e the former MoPac, MKT, and C&NW lines.


> This is MY opinion: Union Pacific has been in
> business for a long time. They built and rebuilt
> their mainlines probably several times over. And
> I'm sure each time, they've made sure to leave
> plenty of room between tracks for WHATEVER is run
> on their tracks, be it a big locomotive or
> specialty rolling stock. I stand by my original
> statement.

OK, stand by it, but it is still incorrect.


> It sounds like there are TWO potential concerns
> with the 4014:
> 1) Swing-out clearance.


And there in lines the problem.


> 2) The ability of a 4-8-8-4 locomotive to
> negotiate a curve radius. (MY opinion: if a
> locomotive with a single set of 8 drivers could
> make a curve, a locomotive with TWO sets of 8
> drivers could make the curve, due to articulation.

The pedestal type tender is the more limiting factor. But, you are forgetting the rigid wheel base of a 4-8-4 with 80" diameter drivers, vs. the rigid wheel base of the 4-8-8-4 with only 68" diameter drive wheels, plus the swinging ability of the front engine and boiler swing-out.