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My thanks to John Colley and R Rinker (p.s. thanks for the trig solution :) <br /> <br />After looking at Marklin Z and comparing to quite a few N-scale Atlas Code 55 and Snap code 60 + Peco and others, I've seen curved thru to the end and what I remeber from the HO days: curved thru the frog and then straight. Man, I tell you how much I searched the Internet and the forums for whatever wording would get me turn-out specs. Figured I'd find an NMRA standard somewhere. <br />Got my idea of the factors from a friends prototype documentation where it listed the radius of the curve (point to frog section) and the angle of the frog. Took the 400+ ft radius x12 =inches / 220 for Z and got close. But I think R Rinker's Trig will get my CAD a bit closer. Marlkin uses 490mm/13.25" full radius in their switches, no straight ends (I remember even cutting off Atlas 20+ yrs ago for this ?) but their sectional track is 220mm (8.75") and 195mm (7.75")! In laying out my module, I was trying to use CAD and roughing it but I find that it will be much easier to just order the switches and use the worst case 220mm (8.75") to model. I'll then replace the sectional with closer to 12-13" flex to keep the radius more proto (that's 36" to you HO'ers). [:D] Switches on the way! <br />Thanks again for the help !
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