Large Scale Central

Turnouts and radius?

What are your recommendations for turnouts going into a 36" radius curve,
as well a turnout going into a 48" radius?

The turnout from the switch would be part of the mainline,
not turning out going into a siding.

would it be a #6 turnout going into a 36" radius mainline curve,
as well,
a #8 turnout for going into a 48" radius mainline curve.

I hope I explained this ok,
Thanks again,
Randy

Why numbered?

Check for curved turnouts (R1, R3, R5 LGB for example) here:

http://www.rrtrack.com/html/g-gauge_track.html

Here are the “radii of the closure rails” (RCR) for O gauge numbered (4 thru 10) turnouts: (Source: NMRA.org)

30" 52" 83" 98" 132" 175" 228"

Multiply by 1.4 to approximate G guage RCRs:

#4 42"

#5 73"

#6 116"

#7 137"

#8 185"

#9 245"

#10 319"

The RCR is the sharpest radius a loco or other rolling stock will encounter going through the numbered turnout.

Randy -

Also note that for many of the larger switches, #6’s for example, The diverging route is a straight track. The smaller switches, R1 and up through Aristo’s Wide switch have curved diverging routes and will fit in a circle of track. Some will need a short fill section to directly replace a curved section.

A good way to figure out what you need is track planning software. You can get a crippled version of RRTrack for free. It won’t save your track plan, but can be used to work out sectional track plans.