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Model Railroading > largest radius curve on 5 X 9 ho layoutDate: 09/10/20 06:52 largest radius curve on 5 X 9 ho layout Author: bluesboyst Anyone know the largest radius curve I can have on a 5' X 9' HO layout?
Thanks Date: 09/10/20 06:57 Re: largest radius curve on 5 X 9 ho layout Author: Rmosele Math is your friend: 5 ft X 12 in = 60 in. less 2 in. assuming you want to have at least an inch from the outside rail to the edge of the layout on each side leaves you 58 inches for trackwork to make a half circle. Divided by 2 = 29 inch radius.
Date: 09/10/20 07:08 Re: largest radius curve on 5 X 9 ho layout Author: bluesboyst Thanks....
Date: 09/10/20 09:50 Re: largest radius curve on 5 X 9 ho layout Author: ts1457 Rmosele Wrote:
------------------------------------------------------- > Math is your friend: 5 ft X 12 in = 60 in. less 2 > in. assuming you want to have at least an inch > from the outside rail to the edge of the layout on > each side leaves you 58 inches for trackwork to > make a half circle. Divided by 2 = 29 inch radius. I always assumed that the radius was measured from the track centerline. Have I been wrong for years? Date: 09/10/20 09:56 Re: largest radius curve on 5 X 9 ho layout Author: jimleighty Actually, it would be a maximum 28" radius (to the center of the track) if you want to keep the track edge 1" in from the edge of the layout. I am allowing a 2" ROW width, not just track tie width.
Jim Date: 09/10/20 10:03 Re: largest radius curve on 5 X 9 ho layout Author: jsnoy If you can, try to expand the layout so that the mainline would be 30". I have found that operations seemed much, much less troublesome after I moved to 30" (and #6 turnouts). I had trouble with 24, 26 and 28 inch radii when running long wheel-base locos and rolling stock. GP locos don't seem to mind tight radii. Passenger cars and autoracks get finicky on tight radii.
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