C to K Track Adaptor Location

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Eddie7979		#1 Posted : 20 September 2024 02:11:36(UTC) Retweet
Joined: 01/07/2022(UTC) Posts: 139 Location: Western Australia, Bassendean		Hi everyone, I was wondering if anyone is able to explain a section from the Marklin locomotive manual. I am considering buying the new SNCF Mikado locomotive, before doing anything I wanted to check the manual to see if it will run on my layout since I have R1 curves in some places. The manual has this diagram: I have a curve using 2 x R4 and 1 x R5 C track, followed by the C to K track converter (24922), then a small section of straight track before going into a turnout. Can anyone explain what this means and what the 24 or 22 means? I recall recalling another manual where it was recommended not having the 24922 track before entering a turnout, so I made sure I didn’t do that. Feels like I can’t win 🙄
		Eddie Perth 🇦🇺 Marklin \| Roco \| Piko CS3+ & iTrain


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nhumps		#2 Posted : 20 September 2024 07:40:01(UTC) Retweet
Joined: 17/12/2018(UTC) Posts: 127 Location: Kapiti Coast		In the context of the diagram the 24... is the prefix for C track series items, the 22... is the prefix for the K track series. I think it is suggesting you should not have a curved piece of C track immediately following the 24922 adapter track. I presume this is because the elevation change of the adapter could cause issues immediately into a curved track. Maybe someone else knows of a specific reasoning beyond that. i would think that they advise this based on an abundance of caution for reliability around the track type transitions. I would think if you are not having any running problems around the transition then there should be no need to adjust you track configuration. Certainly an R5/R4 should be very gentle in the transition. Maybe an R1 at that point could cause some headaches.

3 users liked this useful post by nhumps		hxmiesa, Minok, ChrisKenna
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applor		#3 Posted : 20 September 2024 09:15:10(UTC) Retweet
Joined: 21/05/2004(UTC) Posts: 1,765 Location: Brisbane, Queensland		Originally Posted by: nhumps I presume this is because the elevation change of the adapter could cause issues immediately into a curved track. This. However if you were to have your K track roadbed at the same height as the C track, so that there was no elevation change, then you could have them adjacent without issues. The only other difference between C and K track is the rail height. C track is code 83 and K track is code 100 which I believe is 0.8mm vs 1.1mm rail height. The C track adaptor piece has the two different rail heights meet in the middle where they just sit flush with each other. Or if it's a permanent layout and you're capable with a dremel and willing to have a go (and need the geometry) then you can do some cuts and transition direct from any C to K track piece (assuming you keep the rail heights the same).
		modelling era IIIa (1951-1955) Germany


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H0		#4 Posted : 20 September 2024 10:37:56(UTC) Retweet
Joined: 16/02/2004(UTC) Posts: 15,432 Location: DE-NW		In the old days, that diagram came with some text: "Transfer rail / gradient and start of bend" A change of incline (gradient) in or near a curve can lead to problems. This can also happen if you have a change of incline when using only C track or only K track.
		Regards Tom --- "In all of the gauges, we particularly emphasize a high level of quality, the best possible fidelity to the prototype, and absolute precision. You will see that in all of our products." (from Märklin New Items Brochure 2015, page 1) ROFLBTCUTS

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