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MSTS parameters in OR 'RunUpTimeToMaxforce' Request Rate Topic: -----

#1 User is offline   Coolhand101 

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Posted 03 September 2016 - 10:10 AM

Recently, we are getting more MSTS parameters being implemented in OR.

One of these MSTS parameters was RunUpTimeToMaxforce. This allowed the tractive effort to slowly build up in seconds to the max force. In MSTS, this parameter randomly worked. ie the seconds were ignored then worked another time.

What this parameter did not do was run down the tractive effort in seconds.

In OR, full tractive effort is instantaneous if the throttle is open fully. This does suit certain electrics but not diesels.

Adding tractive tables can help slightly, or using a very low RPM rate. But this only works from idle.

It normally takes a diesel engine up to 20 seconds( or more ) for the tractive force to reach maximum. Another thing is to bring the throttle to a very low setting, watch the tractive effort drop to minimum, then close the throttle.

As we have no true AMP reading in OR, my AMP gauge/dials read the tractive effort.

Any thoughts?

Thanks

#2 User is offline   Lindsayts 

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Posted 03 September 2016 - 02:33 PM

In EMD diesel electrics, the time to Max tractive effort can be set within the machines control system over a specfic time range. In loco's purely used for pass work this is usually set fairly long so the carriages do not receive a jolt, For freight loco's particularly loco's doing a lot of shunting this time often is set quite short.

Lindsay

#3 User is offline   Coolhand101 

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Posted 03 September 2016 - 06:09 PM

 Lindsayts, on 03 September 2016 - 02:33 PM, said:

In EMD diesel electrics, the time to Max tractive effort can be set within the machines control system over a specfic time range. In loco's purely used for pass work this is usually set fairly long so the carriages do not receive a jolt, For freight loco's particularly loco's doing a lot of shunting this time often is set quite short.

Lindsay


For different locos, the time can be adjusted to suit the required range.

Before i make a blueprint to request this feature, would running down the tractive effort used the same time as run up? The 'RunUpTimeToMaxforce' could be used for both?

Thanks

#4 User is offline   sim-al2 

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Posted 03 September 2016 - 08:00 PM

 Coolhand101, on 03 September 2016 - 06:09 PM, said:

For different locos, the time can be adjusted to suit the required range.

Before i make a blueprint to request this feature, would running down the tractive effort used the same time as run up? The 'RunUpTimeToMaxforce' could be used for both?

Thanks


I imagine that run down time can vary from run up time, depending on requirements. Certainly, it would be useful to have the option in OR, for example older electric-powered equipment cut power with a circuit breaker, while run-up takes a number of seconds for the resistors to be cycled through.

#5 User is offline   Coolhand101 

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Posted 04 September 2016 - 08:35 AM

 sim-al2, on 03 September 2016 - 08:00 PM, said:

I imagine that run down time can vary from run up time, depending on requirements. Certainly, it would be useful to have the option in OR, for example older electric-powered equipment cut power with a circuit breaker, while run-up takes a number of seconds for the resistors to be cycled through.


Placing the throttle from a power setting to off, would override this parameter, as in MSTS. Most diesel and electric engines have a notch before 'off'. In the UK, its 'ON' '1' or 'RUN BACK'. Even with thyristor control locos, it was always good practise to lower the T.E before shutting off.

Even with just the basic implementation, it would allow the T.E to rise, rather than instantaneously with the throttle.

Thanks

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