Vacuum Brakes - Latest Development for Steam Locos

Have you given it a go? Post your experiences, particularly things that worked well. Let the team know what works and doesn't work as they cannot test the software with every combination of routes, activities and content available for MSTS. OpenRails is actively being improved and is quickly approaching v1.0. This is a great place to discuss what you can do with OpenRails.

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DarwinS
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Vacuum Brakes - Latest Development for Steam Locos

Post by DarwinS »

It is now possible to have a separate large ejector on steam locomotives. It is also now possible to have functional independent "steam brakes" on vacuum braked steam locos.

There is an example activity on the Coals to Newcastle website:

https://www.coalstonewcastle.com.au/phy ... vity/#act7

Thanks to SteamerCTN for adding this to the OpenRails code.

This will allow more realistic braking control for BR, GWR, LMS and MR locos.

In the near future I will be releasing some OpenRails updates to some of the excellent MSTS cab views by Hans Nooyen and Lew Price to include a large ejector control and high resolution gauges.
Regards

Darwin
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DarwinS
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Posts: 1335
Joined: Fri May 28, 2004 10:08 am
Location: York

Re: Vacuum Brakes - Latest Development for Steam Locos

Post by DarwinS »

There is now a second tutorial on the Coals to Newcastle website. This one uses a locomotive (LNER V2) with a combination ejector of the type that was common on the LNER, SR and many of the pre-grouping companies.

https://www.coalstonewcastle.com.au/phy ... vity/#act8

Another example will shortly be provided as a tutorial for GWR brakes.

The latest round of developments mean that brake valves in Open Rails now behave in a much more appropriate way for vacuum brakes.

These changes do not automatically work with old MSTS files, but a simple cut and paste can significantly improve the functionality of vacuum brakes in old MSTS steam locomotive models.

If you still wish to use MSTS as well as OR you will need to make a copy of the MSTS eng file and put it into an OpenRails sub folder.

Open the copy in the OpenRails sub folder and find the train brake part in the file - this is from the default Flying Scotsman

Brake_Train ( 0 1 0.01 0.65
NumNotches( 3
Notch(0 1 TrainBrakesControllerReleaseStart )
Notch(0.4 1 TrainBrakesControllerRunningStart )
Notch(0.5 1 TrainBrakesControllerApplyStart )
)
)


Replace the entire of the section with:

Brake_Train ( 0 1 0.2 0.2
NumNotches( 3
Notch( 0.0 0 TrainBrakesControllerReleaseStart )
Notch( 0.2 0 TrainBrakesControllerRunningStart )
Notch( 0.4 1 TrainBrakesControllerVacuumApplyContinuousServiceStart ) ) )


and you should find that vacuum brakes on your steam loco work in a similar way to how they used to work with MSTS and probably even better!
Regards

Darwin
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DarwinS
Very Active Forum Member
Posts: 1335
Joined: Fri May 28, 2004 10:08 am
Location: York

Re: Vacuum Brakes - Latest Development for Steam Locos

Post by DarwinS »

The final variation of vacuum brakes on steam now has a demonstration loco and activity.

https://www.coalstonewcastle.com.au/phy ... vity/#act9

The demonstration uses a Hall class locomotive, with both large and small ejector controls as well as the driver's brake valve.

For those who like the GWR there it is now possible to include the brake controls as well as the vacuum pump for most types of GWR locos.

The same features will also allow improved brake models for MR/LMS and LNWR/LYR vacuum brake systems.

Together with the models above this gives fairly comprehensive coverage of vacuum brake systems for steam locomotives.
Regards

Darwin
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