Fastrack O72 Wye Queston

I am sure it so u msn be. 

Romiller49

 

I tried to say, I am sure it would be.

No.  The track starts out as a pair of O-72 1/2 sections but at the point of the frog, the track straightens out.  There are three mini sections of "filler" track that can be used get the length to math the O-72 curve piece but these aren't curved and two of the piecs have 1/2 road bed and the other had no side slope.  I'll see if I can round up two more sections of O-72 curve and try a test overlay.

Unfortunately it is not, just like the normal O72 curve switches actually are not (at least not when you include the required fitter)

 

FasTrack  was not designed (at least not the O72) with the same paradigm of tubular where a like named switch could easily drop in for a same diameter curve. 

 

Based on all the discussions I've read over the years, the FT design seems to be spacing centric instead.  (so as to work out Yard tracks and parallel track arrangements)

 

-Dave

I just tried some test fits.  Out of the box, no.  

 

The first part of the wye up to the frog is a dead on match for O-72, I think its a 1/2 O-72 section.  Unfortunately in turns into a straight from that point on.  I don't have all of the 1/2 or 1/4 curve sections available to try subbing in to get the additional 11 1/4 degree turn plus you would have to deal with the lateral offset on the return side of the curve (aka more small pieces).

Darn.  Oh well I think I can make it work with a normal switch but the Wye would have worked out better.  

Thanks for checking Chuck.  This is what makes this forum so great.  Everyone is willing to help out!

Each leg of the wye is equivalent to a 11.25 degree curve but the legs are mostly straight. They do not exactly match the curve of a o72 section.
IMO this doesn't really matter but I guess it depends on your application.

If you were willing to try to surgically modify a section (1/32 of a circle out of box, or 11.25 degrees) of O-84, it looks like using roughly a half section (approx 5.625 degrees) would make the curve almost meet up.

 

In the pic below, the quarter circle started as pure O72.  In both views, the O72 piece pulled out is to the upper right of the curve, a standard O84 piece is to the lower left of the curve.  The common end of the wye is obviously connected where the curve was removed from the quarter circle.

 

It looks like if you cut an O84 to match the proper length it would match up relatively well to the center rail position of the wye.

 

  

 

-Dave

RealTrax O-72 turnouts follow the exact O-72 curve geometry.

Here is the wye on my layout.