HO Track distance

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Alex H		#1 Posted : 16 October 2023 09:24:17(UTC) Retweet
Joined: 25/03/2017(UTC) Posts: 107 Location: England, Devon		Morning. - a basic question I expect, but in HO with two tracks running side by side, is there a recommended distance between the rails, outside rail to outside rail? Thanks


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H0		#2 Posted : 16 October 2023 09:30:54(UTC) Retweet
Joined: 16/02/2004(UTC) Posts: 15,275 Location: DE-NW		Hi! There are NEM specifications for the distance - measured centre to centre, so result is the same. Surprise, surprise: smaller radii require greater distances and longer coaches require greater distances. Which radii are you going to use? Which types of rolling stock will you run? The 77 mm used by the Märklin C track system are on the safe side for R1. It is 64 mm for R3 and larger. Depending on radius and rolling stock, smaller distances could be sufficient.
		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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Alex H		#3 Posted : 16 October 2023 09:34:00(UTC) Retweet
Joined: 25/03/2017(UTC) Posts: 107 Location: England, Devon		Originally Posted by: H0 Hi! There are NEM specifications for the distance - measured centre to centre, so result is the same. Surprise, surprise: smaller radii require greater distances. Which radii are you going to use? R1 and R2 mostly. yes I can understand smaller radii needing bigger distance !


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H0		#4 Posted : 16 October 2023 09:37:01(UTC) Retweet
Joined: 16/02/2004(UTC) Posts: 15,275 Location: DE-NW		The 77 mm used by the Märklin C track system are on the safe side for R1. It is 64 mm for R3 and larger. Depending on radius and rolling stock, smaller distances could be sufficient.
		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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Alex H		#5 Posted : 16 October 2023 09:38:18(UTC) Retweet
Joined: 25/03/2017(UTC) Posts: 107 Location: England, Devon		Originally Posted by: H0 The 77 mm used by the Märklin C track system are on the safe side for R1. It is 64 mm for R3 and larger. Depending on radius and rolling stock, smaller distances could be sufficient. Thanks for that info, very useful. I have also just found a specification sheet online. Cheers


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hxmiesa		#6 Posted : 16 October 2023 10:09:23(UTC) Retweet
Joined: 15/12/2005(UTC) Posts: 3,522 Location: Spain		That 77mm distance is for the 1:93,5 wagons to be able to negotiate parallel R1/R2 curves. It looks far too wide. Prototypcal distance is 4,7m. (54mm in H0) -or even as low as 3,8m for newer DB tracks. The K-track system use 57mm for the slim switches, which looks very nice. (R9 curves)
		Best regards Henrik Hoexbroe ("The Dane In Spain") http://hoexbroe.tripod.com
		WWW

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H0		#7 Posted : 16 October 2023 11:01:52(UTC) Retweet
Joined: 16/02/2004(UTC) Posts: 15,275 Location: DE-NW		Originally Posted by: hxmiesa That 77mm distance is for the 1:93,5 wagons to be able to negotiate parallel R1/R2 curves. It looks far too wide. It surely is far too wide, but the radii are far too small. In my experience, even coaches in 1:87 (316 mm) can safely be used with 77 mm spacing and R2/R3. Smaller distances can be used with either larger radii or shorter rolling stock.
		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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