• posted
Where is the measurement of a curve track taken? At the inside rail? The
outside rail? Or the center point of the two rails?
• posted
For most track it's the radius at the centerline. However, for Lionel O-scale stuff, I think it's the inside rail and it may be the diameter, rather than the radius, which is indicated. I hope an O-scaler replies and clarifies that. -- Bill McC.
• posted
Regular Lionel O makes a 31" diameter exterior measured circle... so it is just under 15" radius as measured by conventional methods(centerline) taking in to account the 1.25" gauge and some tie overhang.
And then so it goes with O-27, O-42, O-54, O-72, all referring to outside diameters. Super O and FasTrack is 0-36.
Rob
• posted
Normal model railway practice is to measure at the center-line of the track gauge.
• posted
Thank you. I am drawing a layout plan and that little bit of info will help keep it on track.
John
• posted
In article snipped-for-privacy@ihug.co.nz, Gregory Procter at snipped-for-privacy@ihug.co.nz wrote on 1/11/05 3:44:
In a related vein, is there a mathematical formula one could use to determine the easement when laying track? Everybody knows the formula to calculate the area of a circle, for example, but what about determining the easement for a given curved track? I would want to be be able to plug in the relevant figures and derive a usable value from that.
Dieter Zakas
• posted
Years back I wrote a Basic program for calculating end displacement of coaches on curves. From this I can calculate set radius curves of one coach cord length which when strung together (and averaged) create a practical easement into a specified radius curve. There are other tables and programs around, but it depends what you want to achieve. The reasons I wrote my one were twofold, to avoid the appearance of passenger coach corridor connections looking completely unconnected, and to assist in loco chassis design for my overly sharp layout curves.
Regards, Greg.P.
• posted
determining the