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I finally got a TMCC Cab Forward blowing pretty serious steam (Mega Steam) -- so much so that it kind of soaked the area around the smokestack!  I assumed it was condensed steam fluid - i.e. oil - but I looked at it today (after 24 hrs) and it seems to be gone.  Evaporated.

 

Is it possible that the "wetness" was water vapor?  Doesn't make sense to me, but how else could all that steam residue go away?

 

I'm also curious if anyone has noticed a build-up of oily residue on their track, layout, furniture, etc. if they like a lot of steam coming  out of their locos -- does the stuff gradually accumulate on surfaces over time?

 

Boy, that engine (TMCC Cab Forward) sure is difficult to fill with smoke fluid -- it has a bar that runs right over the top center of the stacks.  You need a needle applicator to get the fluid past it, as the eyedropper supplied with Mega Steam just makes a huge mess and much of it did not even make it into the batting -- it was all over the *inside* of my loco.  I got all that cleaned up before testing and seeing the boiler soaking -- which may have been exacerbated by the bar over the stacks which blocks some of the smoke coming out.  At times it appeared to be "flowing" out of the stack and down the sides of the boiler, as if it were dry ice in there!

 

Thanks for your thoughts!

Last edited by Randy P.
Original Post

The light oil that makes the fake "smoke" (actually it should be referred to as "steam"

and "steam fluid", as real steam becomes white once it begins to condense, and coal/oil

smoke is essentially black, so I like your terminology) is harmless and will vaporize on

its own over a fairly short time. Not to worry. I have noticed it soaking a Dullcote

finish on some of my custom-painted steamers, but even that eventually just blends

into the delightful, dirty steam loco background ambience. 

 

But, a LOT of mess might call for you to dial the amount back; steam locomotives did not

always smoke that much - it depended on the fuel, the fireman and the immediate load/demand. A well-fired steamer (especially a coal-burner) running at a steady speed

with good fuel actually often produced less smoke than the early diesels. This can be

seen on film footage. Of course, so can the shots of them really smoking it up.

======== 

The "bar" on the stacks of the SP cab-forwards was a splitter to divert some of the force

of the exhaust away from the interior roofs of tunnels. According to what I have read, this steam blast could dislodge age-old oil (and some coal) exhaust residue, plus some rocks that might be verging on letting go (lots of vibration over time).

Last edited by D500

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