Air too Vacuum-How?

RobertM · Post by **RobertM** » Mon Dec 13, 2004 11:39 am

Hi all,

I was wondering how too change the Nene Valley Stock to Vacuum brakes so I can use them with the BATS SVR stock. I have changed the brake from Air too Vacuum but that doesn't work because when I apply the brakes nothing happens.

What else do I need too change in the ENG & WAG files?

RobertM

ianmacmillan · Post by **ianmacmillan** » Mon Dec 13, 2004 12:17 pm

Make a copy of the NVR_Whatever.wag file and rename it by adding _VB to the name so it becomes NVR_Whatever_VB.wag.

Open the SVR .wag file and look for the section. . . .

BrakeEquipmentType( "Handbrake, Vacuum_brake, Auxilary_reservoir" )
BrakeSystemType( "Vacuum_single_pipe" )
MaxBrakeForce( 18KN )
MaxHandbrakeForce( 15kN )
TrainPipeLeakRate( 0 )
AuxilaryLeakRate( 0.1 )
TripleValveRatio( 2.5 )
MaxReleaseRate( 14 )
MaxApplicationRate( 14 )
MaxAuxilaryChargingRate( 15 )
BrakeCylinderPressureForMaxBrakeBrakeForce( 21 )

Copy and paste this into the new NVR file to replace the air entry.

Copy and pasting like this is the best way to change brakes. It will ensure all the stock will perform in a similar way.

You could also use the same method to make air braked versions of the SVR stock using the NVR settings.

Ensure you match the coupling types as well.

Fodda · Post by **Fodda** » Thu Dec 16, 2004 3:05 pm

Make sure you catch all three mentions of air_single_pipe and change them all to vacuum_single_pipe in eng files.

A search in the eng file will get them all.

There are a lot more brake parameters than that in engines... It's not particularly easy to convert diesel engines to vacuum brakes as I've discovered... But changing the lines will do it... Just don't expect the gauges to work prototypically. That takes an age.

Easiest way to change the brakes of locos or stock is to use RouteRiter to do it all automatically. In fact you can do your whole Trainset directory in one big go if you really thought it was a good idea.

jbilton · Post by **jbilton** » Thu Dec 16, 2004 6:38 pm

Hi
I think Robert and Ian were discussing coaches.....not engines.
However I'm rapidly coming to the conclusion that msts doesn't actually allow a vacuum brake on a diesel...but you can nearly make the air brake act like a vacuum brake with carefull manipulation of the fiqures....and altering the cvf file...(if you want to drive with F6 on..like I do).
Strangely enough there is another thread running in the forums ATM, where the poster is complaining that his brakes are working like a vacuum brake....I've asked which loco this is...because I'm interested.
Cheers
Jon

Fodda · Post by **Fodda** » Tue Dec 21, 2004 10:25 am

Jon you're absolutely right. All the diesels on the ELR CD are vacuum braked and to be honest, that was the hardest part of all in getting the cabviews to work. You're right in that I think MSTS assumes that steamers have vacuum brakes and everything else gets along with air.

I was unlucky enough to make my first cabview a Warship which has just vacuum train-braking. That was my first delving into the eng file and after I'd put all the vacuum numbers in, it didn't work.

So I had to fudge the air figures to achieve a vacuum braking effect.

Doing air-brakes in a diesel engine is an absolute doddle compared with the shennanigans involved in modelling vacuum gauges.

Just one more little MSTS niggle that we've just come to accept now.

thenudehamster · Post by **thenudehamster** » Wed Dec 22, 2004 12:05 am

I think it's one of those 'Kuju never implemented it' situations.

Looking at the defaults, all the diesels are US, which are air-braked, along with the Golsdorf and all the Japanese MUs. Only the Scotsman is vacuum, so why make braking systems for something you're not using?

Somewhere in the depths of the code is the answer to this, as well as many other problems....