Hi --

Dave is absolutely correct about this.   I build almost all of my turnouts in 
place because then the track “flows” as it is not being forced into a standard 
geometry.   With our sharper than prototypical curves, this makes a big 
difference in looks and operation.

FYI, I have a curved turnout on a 75 / 78” pair of curves, and from the tip of 
the points to the heel of the frog is about two feet.   It takes at least 
another two feet to gain full separation of the tracks.   Generally, it’s 
easier to stick a bit of something less curved on the outer leg and then 
tighten up the curve a bit after the frog if you need rapid divergence.   You 
can see this in the photo (I hope you can see it) in the track just behind the 
caboose on the right.   The left hand caboose is sitting on a constant 75” 
radius, and the area behind the right hand caboose is probably a bit less than 
72” radius leading to the 78” radius.  The turnout joining the two tracks is 
curved just after the narrow gauge frog, though between the points and that 
frog it is straight on the right side.   (This is kind of the other side of the 
coin relative to Dave’s straight through the frog...) 

In any case, I can recommend trying to build a turnout from scratch.   It might 
take a couple of tries, and a large capacity soldering gun, but you can build 
whatever you want whenever you want once you get some skill.

Good luck and have fun!
Bill Winans
---------------------------------

Curved turnouts can be tricky to lay out. I've found it easier to draw the 
routes I want the track to take then just see what kind of turnout is needed to 
fit them instead of trying to place a stock turnout into the track plan. Going 
from inside to outside tracks usually is easier if you use a straight section 
thru the frog to increase the rate of separation, a completely curved turnout 
can take a lot of space to diverge the 3 inches necessary for S scale double 
tracks. 
...DaveBranum 

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