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   Post reply ( Re: Italian Variation on a Wye )
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Topic Summary
Posted by: 130_MM Posted on: Jan 30th, 2017, 12:25pm
Don't know if this has been posted before, but it is a variation on a Wye (called a track "star"?) where each switch is a spring switch. Therefore no one has to get off to throw any of the switches. It is located in Carbonia, Sardinia, Italy. It may be the last one left in the world.
Posted by: Henry Posted on: Jan 30th, 2017, 12:56pm
They had to REALLY want to turn an engine there to build one of those!
Posted by: Norm_Anderson Posted on: Jan 30th, 2017, 4:12pm
That's quite ingenious!  Looks like it consumes less space, and allows broader curvatures, than a conventional wye, and what with the spring switches, it's probably faster than a turntable.
The do-it-yourself Wye-O-Matic . . .
Posted by: George_Harris Posted on: Jan 30th, 2017, 9:40pm
WOW!!  Five turnouts, all with spring switches and three crossing diamonds, all curved, plus more total length of track.  You really wanted to save space badly.  This thing would have certainly cost two to three times as much, maybe even more to build and maintain as a normal wye.  However, it would not save as much space as you might think, as it requires not one, but three tail tracks having a length of whatever cut of cars plus engine that you would but through it.  
One of the much more normal varieties of the wye, which is sometimes and in some places call a triangle, rightly so had three spring switch turnouts.  One example up to the end of passenger service, early to mid 1960's, was the approach to the Missouri Pacific passenger station in Hot Springs, Arkansas.  If I have it in memory correctly, coming in from the east, the Little Rock direction, cross a turnout, facing point, lined for the left side, pull through over a turnout, trailing direction, springing the points.  Stop back across same turnout facing direction, turnout lined left.  This puts you in the wye going toward the station.  At the other end of the wye track go across the turnout at the throat of the wye, trailing direction, springing the points.  Continue on into the platform track.  End of run.  When ready to depart, pull out.  The turnout is already lined for the departure side of the wye.  Go around the wye, springing the turnout on the departure end of the way.  You are now on the the way you came in.  You have gone over thee turnouts twice, once in each direction, without having to throw any switches.