International Railroad Discussion > How to change the side of narrow gauge inside a broad gauge track

Hi, I live in a area with dual gauge tracks. Sometimes it is necessary to change the side of the narrow gauge inside the broad gauge track in function of something that can be an obstruction to circulation of the trains. A special device is used in this application called "Pombinho" in the railroad engineering words. Here in my town, due to the circulation of the log trains with flat cars wider than normal, it was necessary to install a "Pombinho" to prevent these kind of cars hit a wall in a curve in the yard. The job is doing this week and is almost finished. In general, the "Pombinho" has two sides; one to allow the train change the side and than go back to the normal side after to pass the obstruction. The pics show the "Pombinho" in construction here in EVP yard.
 

Pedro Rezende
Vespasiano MG,




Edited 1 time(s). Last edit at 07/22/18 07:51 by pedrop.

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Interesting. Distant cousin of gantlet track.

A low view of the device.

Pedro Rezende
Vespasiano MG,
https://youtube.com/c/minasgeraisrailways1

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It can ve adjusted from TR57 to TR68 rails

Pedro Rezende
Vespasiano MG,
https://youtube.com/c/minasgeraisrailways1

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A view in the opposite direction.
Pics taken with cell phone, so not good quality.

Pedro Rezende
Vespasiano MG,
https://youtube.com/c/minasgeraisrailways1

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More details.

Pedro Rezende
Vespasiano MG,
https://youtube.com/c/minasgeraisrailways1

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mile250 Wrote:
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> Interesting. Distant cousin of gantlet track.

Not even close to ganlet track. 

It would more likely be a cousin to a   pointless switch.

The builde's plate

Pedro Rezende
Vespasiano MG,
https://youtube.com/c/minasgeraisrailways1

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Another view of the device.

Pedro Rezende
Vespasiano MG,
https://youtube.com/c/minasgeraisrailways1

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Is this near a Wye or a Reversing Loop?
These' transition' rails are necessary when a train or engine is reversed and the narrow gauge aligned the entry route.

James R.(Jim) Baker
Whittier, CA

No, Sometimes it is necessary to change the side of the narrow gauge inside the broad gauge track in function of something that can be an obstruction to circulation of the trains. A special device is used in this application called "Pombinho" in the railroad engineering words. Here in my town, due to the circulation of the log trains with flat cars wider than normal, it was necessary to install a "Pombinho" to prevent these kind of cars hit a wall in a curve in the yard. The job is doing this week and is almost finished. In general, the "Pombinho" has two sides; one to allow the train change the side and than go back to the normal side after to pass the obstruction. 
JimBaker Wrote:
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> Is this near a Wye or a Reversing Loop?
> These' transition' rails are necessary when a
> train or engine is reversed and the narrow gauge
> aligned the entry route.

Pedro Rezende
Vespasiano MG,
https://youtube.com/c/minasgeraisrailways1

Some notes on the picture

Pedro Rezende
Vespasiano MG,
https://youtube.com/c/minasgeraisrailways1

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The ballast train arrived today afternoon, so tomorrow they will add balast to these tracks. I will try to register and watch the first train passing through the device.

Pedro Rezende
Vespasiano MG,
https://youtube.com/c/minasgeraisrailways1

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Thanks Pedro. Your posts are always interesting and informative!

Jim B

Pedro, is there a speed restriction with this device? Thanks for the photos. Love the dual gauge stuff

Yes, speed restriction of 20 km/h while crossing the 200 meters long device.

CPRR Wrote:
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> Pedro, is there a speed restriction with this
> device? Thanks for the photos. Love the dual gauge
> stuff

Posted from Android

Pedro Rezende
Vespasiano MG,
https://youtube.com/c/minasgeraisrailways1

Now that would be cool to model, thanks for the pics.

Modelers should e careful to monitor their truck's back-to-back wheel measuremnt to pass sucessflly through the frogs.

James R.(Jim) Baker
Whittier, CA

Wouldn't be any different than the gauge in a regular switch.

JimBaker Wrote:
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> Modelers should e careful to monitor their truck's
> back-to-back wheel measuremnt to pass sucessflly
> through the frogs.