 Joined: 19/09/2022(UTC) Posts: 459 Location: Kaarina
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Hi, In order to fit smoke unit to some retrofit diesel locos, the standard tube shape will not fit, so I thought I’d make one myself. Here’s the schemantics:  So it’s a coiled wire that is connected to the decoder. The coil is wrapped with a cotton swap that is soaked with smoke fluid. The whole thing is assmbled to a shallow pool that will fit to the US brand diesel locos. What material should the coil be and can I connect it between U+ and Aux1? What about Aux1 and ground instead? What about the cotton swap? Is it a bad idea or should the smoke fluid just be freely in the pool/container with the coil in it? Thanks! -Eino
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 Joined: 11/07/2018(UTC) Posts: 217 Location: Aruba (general), Oranjestad
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Not a good idea Eino!
The styrene and cotton will catch fire due to the heat of the coil....
Did you ever feel how hot a smoke generator gets in a steam lok?
Regards
Jean-Pierre
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 1 user liked this useful post by cintrans
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 Joined: 22/01/2009(UTC) Posts: 14,875 Location: On 1965 Märklin Boulevard just around from Roco Square
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Originally Posted by: cintrans  Not a good idea Eino!
The styrene and cotton will catch fire due to the heat of the coil....
Did you ever feel how hot a smoke generator gets in a steam lok?
Regards
Jean-Pierre Isn't this the whole idea to get real smoke out of the generator  |
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1 user liked this useful post by river6109
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Joined: 19/09/2022(UTC) Posts: 459 Location: Kaarina
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Yeah  But there’s a lot of videos online where people make these in plastic bottle caps… -Eino
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 Joined: 05/12/2008(UTC) Posts: 1,802 Location: Crozet, Virginia
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There are a lot of videos online of people doing many things that I would not recommend, and this is one. |
Regards,
Jim
I have almost all Märklin and mostly HO, although I do have a small number of Z gauge trains!
So many trains and so little time. |
2 users liked this useful post by dickinsonj
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Joined: 19/09/2022(UTC) Posts: 459 Location: Kaarina
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So let’s forget about all the plastics and replace them with metal parts.
What would the plan looklike then?
-Eino
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 Joined: 28/09/2019(UTC) Posts: 119 Location: Rogaland, Haugesund
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Interesting idea… must admit it has occurred in my mind to…
Still I think it might be too challenging.
I think I remember having measured the resistance of a smoke generator to approx 45 Ohm. At 12 volt dc this would require 0,26 Amps. Then I do not know if resistance in coil measured when cold will change when heated. Normally I think these coils are made from nickelchrome wire as used in styrofoam cutters. But I have not found info of resistance pr m wire. 0.1 mm wire is possible to procure…
Also other materials may be used that I do not know of.
Still. Keep us in the loop if you go further with your idea.
Regards
Thor
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1 user liked this useful post by Tie
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Joined: 19/09/2022(UTC) Posts: 459 Location: Kaarina
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Maybe the biggest question here is what should I do / not do in order to keep the decoder alive and not burn it in process.
-Eino
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 Joined: 18/02/2008(UTC) Posts: 1,334
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Isn't it easier to use a normal Seuthe smoke generator and just do a metal adapter to the locomotive?
You can use screws or glue to fit the adapter to the locomotive body. the screws will look worse, but I don't know if there is any glue that can support the high temperatures.
Maybe others have a better idea to attach the adapter to the locomotive body.
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Best regards,
Miguel
Mostly Märklin H0.
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Joined: 19/09/2022(UTC) Posts: 459 Location: Kaarina
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Originally Posted by: mbarreto
Isn't it easier to use a normal Seuthe smoke generator and just do a metal adapter to the locomotive?
You can use screws or glue to fit the adapter to the locomotive body. the screws will look worse, but I don't know if there is any glue that can support the high temperatures.
Maybe others have a better idea to attach the adapter to the locomotive body.
This would be the case with older Märklin locos that are mostly empty inside, but the locos I have, got centrally mounted motors with dual flywheels and a big frame for weight. So there is maybe 8mm space between the hull and the plastic body of the loco. -Eino
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1 user liked this useful post by einotuominen
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Joined: 18/02/2008(UTC) Posts: 1,334
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Ok, I understand there is not much space inside. You can take a look (in case you didn't already) at the Seuthe several products (link to the page below) to check if some fit, although probably not if the space is really small: Seuthe H0 smoke units |
Best regards,
Miguel
Mostly Märklin H0.
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1 user liked this useful post by mbarreto
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Joined: 28/09/2019(UTC) Posts: 119 Location: Rogaland, Haugesund
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Whatever You do… I assume some testing prior to installation in loco would be required.
Regards
Thor
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1 user liked this useful post by Tie
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Joined: 19/09/2022(UTC) Posts: 459 Location: Kaarina
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Originally Posted by: Tie Whatever You do… I assume some testing prior to installation in loco would be required.
Regards
Thor Absolutely!
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Joined: 28/09/2019(UTC) Posts: 119 Location: Rogaland, Haugesund
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New idea: if the goal is smoke, not a homemade smoke generator… you cold drill a hole in the metal frame and mount a smoke generator vertially. (Type with cables to decoder. Then extend outlet with a silicontube to top of loco.
Regards
Thor
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Joined: 19/09/2022(UTC) Posts: 459 Location: Kaarina
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Originally Posted by: Tie New idea: if the goal is smoke, not a homemade smoke generator… you cold drill a hole in the metal frame and mount a smoke generator vertially. (Type with cables to decoder. Then extend outlet with a silicontube to top of loco.
Regards
Thor This will work on some cases yes. It depend on the loco and the location of the smoke exhaust. On some points there maybe a flywheel too close etc. But will work on some locos yes. -Eino
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Joined: 28/09/2019(UTC) Posts: 119 Location: Rogaland, Haugesund
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I just compared with my br218. Think it would work. Cold also 3d print the outlet to get twin exhaust.
Regards
Thor
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1 user liked this useful post by Tie
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