Frisco Alco RS1 & S2 stacks

Discussion in 'RS1' started by meteor910, Jan 5, 2011.

  1. meteor910

    meteor910 2009 Engineer of the Year Staff Member Frisco.org Supporter

    The Frisco's Alco S-2 switchers and Alco RS-1 road switchers (AT&N) had SLSF-applied extensions added to their Alco 539 engine exhaust stacks. The S-2 stacks looked to be about double the height of the original Alco exhaust stack height. The RS-1's looked to be about three times the height of the original Alco stacks.

    Does anybody have a suggestion as to what tubing to get to add these extensions to the Atlas HO S-2 and RS-1 models so as to correctly do these Frisco units?

    The ex-NEO S-2's (and the one ex-NEO S-4) do not appear to have had these exhaust stack extensions installed after they were added to the Frisco roster.

    Suggestions? Thanks.

    Ken
     
    Last edited by a moderator: Jan 5, 2011
  2. TAG1014 (Tom Galbraith RIP 7/15/2020)

    TAG1014 (Tom Galbraith RIP 7/15/2020) Passed Away July 15, 2020 Frisco.org Supporter

    A doll house funnel, upside down? :D Seriously though, it's a cone (Actually a chopped off cone) with a longer tube. I've been trying to figure some kind of hobby/detail part, but coming up empty. There's probably some kind of styrene architectural "shape" out there or a combination of them that would work. Still looking...

    Tom
     
    Last edited by a moderator: Jan 5, 2011
  3. Karl

    Karl 2008 Engineer of the Year Frisco.org Supporter

    Several of the RS-1's had conical smoke lifters applied to their original stacks. This practice made have pre-dated the stack extension. I believe that the 109 was one of those units.

    As to the stack extension, I think that I'd remove the current cylindrical portion of the stack from the Atlas stack assembly, and replace it with the proper length of brass tubing. In order to obtain the small "flange" at the top of the stack, place the tubing into a drill chuck, and use a file to "turn" the tubing to the proper contour.
     
  4. meteor910

    meteor910 2009 Engineer of the Year Staff Member Frisco.org Supporter

    Karl - Can you post a pic of 109 with the stack smoke lifter on it? I'm not sure I have ever seen one of these.

    On many/most of the RS-1's, and S-2's, you can see the weld where the Frisco just added a stack extension to the Alco stack cylinder coming up from the "funnel".

    Ken

    ps - It's a rectangular funnel (inverted), not a round one. Alco used this manifold on all their S-1, S-2, S-3, S-4 and RS-1 models as the 539 engine was not turbocharged.
     
    Last edited by a moderator: Jan 5, 2011
  5. Karl

    Karl 2008 Engineer of the Year Frisco.org Supporter

    Page 35 in Marre and Harper show 109 with the conical smoke lifter/smoke deflector, which was similar to those that the Frisco placed on several classes of steam locomotives. The picture is dated 9/54.

    Page 16 in Frisco in Color, the 109 is shown again, but this time on Feb 3, 1961. The steam locomotive-styled smoke lifter has been replaced with the shotgun extension, which seemingly were applied to all of the RS-1 at some point during their careers.
     
    Last edited by a moderator: Jan 6, 2011
  6. meteor910

    meteor910 2009 Engineer of the Year Staff Member Frisco.org Supporter

    Ah! - now I see what you mean. Thanks Karl.

    Ken
     

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