Possible air brake compressor bug in Monogame V105
#1
Posted 22 September 2021 - 08:25 AM
This also points out what I believe is another omission that has been present in OR loco operations with regard to air compressors. Prototypically, when locomotives are MU'ed together, ALL air compressors will run and feed air to fill the train pipe, etc.--their airflow is thus additive--more locomotives means more airflow. This also includes mid-train and rear distributed power--DP currently does not even respond to drops in train pipe pressure and start the DP air compressors. Again, this is not faithful to prototypical operation. Finally, I believe there should be a "main air reservoir leak rate" parameter available for each locomotive, in addition to the current TrainPipeLeakRate parameter. Main locomotive reservoirs do leak without affecting the train pipe, but will cause the compressor to run to replenish the main reservoir.
Thanks in advance for looking into this.
#2
Posted 22 September 2021 - 08:48 AM
#3
Posted 22 September 2021 - 11:30 AM
#4
Posted 22 September 2021 - 12:26 PM
#5
Posted 22 September 2021 - 03:21 PM
Quote
This is exactly correct!
At "Running" position (I mean real driver's valve now, not MSTS brake token) the pressure at BP is maintained on "normal" level, as well as at "Lap with feeding" position (keeps reduction step).
But leaks from both: brake and feeding networks are compensated by main reservoir's air deposite, so indeed MR's pressure decreases with time, causing compressor(s) to pump it up periodically.
WRT turned-off compressors, by default that must not be so, definitely!
Compressor can be turned off intentionally for saving its resource or for guarantee of having reserve, or may be so due to failure, but normally, all compressors are working together. Furthermore, it's complex to turn-off mechanical compressor - only by cut-off it from entry system by valve.
#6
Posted 23 September 2021 - 11:58 PM
railguy, on 22 September 2021 - 11:30 AM, said:
As you can't find the 10 minutes needed, I had to test myself. Below is the result with the actual testing version
As can be seen, only for the first locomotive the compressor state is shown. With 1.3.1 the compressor state is shown for all three locomotives.
I'd ask our physics expert to examine the issue, to avoid having this bug in the 1.4 release.
#7
Posted 24 September 2021 - 05:14 AM
#8
Posted 24 September 2021 - 08:55 AM
#9
Posted 25 September 2021 - 04:43 AM
In the test I did, the SLI ES44AC have a mechanical compressor accordingly to the .eng file, and so the state of the compressor is not shown (except for the player locomotive).
Moreover IMHO if mechanical compressors in diesels are always on, they should be shown in state ON in the HUD, rather than being not shown at all.
#10
Posted 25 September 2021 - 04:53 AM