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ORTS FBL GP38-2 are real SMOKERS

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    ORTS FBL GP38-2 are real SMOKERS

    Hi all,

    These locos are real smokers. No matter what I do with the four lines in the ENG file that describe the smoke I still get dark black smoke. I've even set them all to zero and still get lots of dark black smoke. Any help would be appreciated.

    Fred

    #2
    Do you have 3DTrains diesel smoke texture files installed in your main GLOBAL folder....you can download it from the wayback machine at the internet archive, link is below.

    3dtrains, virtual railroads, railroading, railfans, microsoft train simulator, auran trainz, computer trains, computer railroads, train simulations, commercial addon content, 3rd party develop, railroad games
    Cheers, Gerry
    "A mind is like a parachute. It doesn't work if it is not open." Frank Zappa
    It's my railroad and I'll do what I want! Historically accurate attitude of US Railroad Barons.
    Forever, ridin' drag in railroad knowledge.
    Audi, Vide, Tace, Si Vis Vivere In Pace

    Comment


      #3
      Also, if you are using the OR Diesel Engine Definition, you can adjust the color of the exhaust...it is a HEX code sequence.

      ExhaustColor ( 20161819 )
      ExhaustTransientColor ( 40212324 )​

      Switching to an OR diesel engine will give you more control over exhaust dynamics, plus better engine simulation.
      Code:
      Comment ( VER3 Standard ORTS Diesel Engine for EMD GP38-2 )
      Comment ( Car and Locomotive Cyclopedia of American Practice 4th Editon 1980 Pages760-761 )
      Comment ( GM EMD Locomotive Specification-8090 January 3, 1982 Model GP38-2 Revised-July 1975 )
      Comment ( EMD GP38-2 Operator's Manual, 6th Edition, April,1979 )
      Comment ( Derek Morton Train physics )
      Comment ( Maximum Speed 76mph Gearing 60:17 )
      Comment ( Power Rating == Gross HP 2150 == Traction HP 2000 == Rail HP 1708 )
      Comment ( Continuous Tractive Effort 55350lb @ 11.42mph==85.4%eff. == Starting Tractive Effort 67788lb )
      Comment ( Mass 255516lbs = 115.9t == metric, Adhesion Factor = 26.53% )
      Comment ( Mass×Adhesion Factor = Starting Tractive Effort )
      Comment ( Brake HP -- bhp = Power-at-the-shaft = Gross HP or MaximalPower )
      Comment ( Diesel Consumption Tab from www.gatx.com )
      Comment ( include ( "..\\..\\..\\..\\..\\Common.inc\\Locomotives\\Std_EngV3_GP38-2.inc" ) )
      
      ORTSDieselEngines ( 1
      Diesel (
      IdleRPM ( 235 )
      MaxRPM ( 950 )
      StartingRPM ( 135 )
      StartingConfirmRPM ( 285 )
      ChangeUpRPMps ( 90 )
      ChangeDownRPMps ( 57 )
      RateOfChangeUpRPMpSS ( 14 )
      RateOfChangeDownRPMpSS ( 9 )
      MaximalPower ( 1603255W )
      IdleExhaust ( 1.2 )
      MaxExhaust ( 2.2 )
      ExhaustDynamics ( 1.6 )
      ExhaustDynamicsDown ( 0.8 )
      ExhaustColor ( 20161819 )
      ExhaustTransientColor ( 40212324 )
      DieselPowerTab (
      0 0
      318 200593
      408 401187
      498 601034
      588 801628
      678 1002221
      768 1202814
      858 1402662
      950 1603255
      )
      DieselConsumptionTab (
      0 0
      235 14.4
      318 26.5
      408 60.6
      498 118.8
      588 177.1
      678 241.5
      768 314.5
      858 389.1
      950 463.3
      )
      ThrottleRPMTab (
      0 235
      12.5 318
      25 408
      37.5 498
      50 588
      62.5 678
      75 768
      87.5 858
      100 950
      )
      DieselTorqueTab (
      0 0
      318 48142
      408 37522
      498 30741
      588 26036
      678 22580
      768 19934
      858 17843
      950 16115
      )
      MinOilPressure ( 30psi )
      MaxOilPressure ( 90psi )
      MaxTemperature ( 120degc )
      Cooling ( 3 )
      TempTimeConstant ( 720 )
      OptTemperature ( 71degc )
      IdleTemperature ( 55degc )
      )
      )
      ORTSEmergencyCausesThrottleDown ( 0 )
      ORTSWheelSlipCausesThrottleDown ( 0 )
      ORTSMainResChargingRate ( 0.4psi/s )
      ORTSBrakePipeChargingRate ( 200psi/s )
      ORTSEngineBrakeReleaseRate ( 38psi/s )
      ORTSEngineBrakeApplicationRate ( 34psi/s )
      ORTSBrakePipeTimeFactor ( 0.003 )
      ORTSBrakeEmergencyTimeFactor ( 0.1 )
      ORTSBrakeServiceTimeFactor ( 1.009 )
      ORTSAirBrakeMainresvolume ( 28.35ft^3 )
      TrainPipeLeakRate ( 0.0833psi/s )
      TrainBrakesControllerMaxReleaseRate ( 10psi/s )
      
      MaxForce ( 301506N )
      MaxContinuousForce ( 246209N )
      ORTSSpeedOfMaxContinuousForce ( 11.42mph )
      ORTSMaxTractiveForceCurves (
      0 (
      0 0
      4.17 0
      6.26 0
      8.94 0
      12.07 0
      15.65 0
      19.67 0
      24.14 0
      29.06 0
      33.53 0
      38.00 0 )
      0.125 (
      0 37689
      4.17 37689
      6.26 25112
      8.94 17578
      12.07 13021
      15.65 10045
      19.67 7990
      24.14 6511
      29.06 5409
      33.53 4688
      38.00 4136 )
      0.25 (
      0 75377
      4.17 75377
      6.26 50223
      8.94 35156
      12.07 26042
      15.65 20089
      19.67 15980
      24.14 13021
      29.06 10818
      33.53 9375
      38.00 8272 )
      0.375 (
      0 113065
      4.17 113065
      6.26 75334
      8.94 52734
      12.07 39062
      15.65 30134
      19.67 23970
      24.14 19531
      29.06 16226
      33.53 14063
      38.00 12408 )
      0.50 (
      0 150753
      4.17 150753
      6.26 100445
      8.94 70312
      12.07 52083
      15.65 40178
      19.67 31960
      24.14 26042
      29.06 21635
      33.53 18750
      38.00 16544 )
      0.625 (
      0 188441
      4.17 188441
      6.26 125556
      8.94 87890
      12.07 65104
      15.65 50223
      19.67 39950
      24.14 32552
      29.06 27043
      33.53 23438
      38.00 20680 )
      0.75 (
      0 226130
      4.17 226130
      6.26 150667
      8.94 105467
      12.07 78124
      15.65 60267
      19.67 47940
      24.14 39062
      29.06 32452
      33.53 28125
      38.00 24816 )
      0.875 (
      0 263818
      4.17 263818
      6.26 175779
      8.94 123045
      12.07 91145
      15.65 70312
      19.67 55930
      24.14 45573
      29.06 37860
      33.53 32812
      38.00 28952 )
      1.0 (
      0 301506
      4.17 301506
      6.26 200890
      8.94 140623
      12.07 104165
      15.65 80356
      19.67 63920
      24.14 52083
      29.06 43269
      33.53 37500
      38.00 33088 )
      )
      Cheers, Gerry
      "A mind is like a parachute. It doesn't work if it is not open." Frank Zappa
      It's my railroad and I'll do what I want! Historically accurate attitude of US Railroad Barons.
      Forever, ridin' drag in railroad knowledge.
      Audi, Vide, Tace, Si Vis Vivere In Pace

      Comment


        #4
        If you are referring to, for example, FBL GP38-2 #1657, look toward the bottom of the .eng file. You should see this line:
        Include( "../NAVS_AUDIO/EMD_8_16-645E/Physics/EMD_16-645E-4.inc" )

        That points to the NAVS "include" file that defines the locos's physics. In that .inc file, the exhaust color, rate, dynamics, etc. are defined. That is where the exhaust for the locomotive can be adjusted. With that "include" line in the ,eng file, OR is ignoring the exhaust parameters in the .eng file.

        Comment


          #5
          Indeed, if they have NAVS physics installed then that's where the adjustment should be made.
          Thanks Wade, that makes sense, I was off on the wrong track, had not downloaded them. Apologies to OP for confusion I introduced.
          Cheers, Gerry
          "A mind is like a parachute. It doesn't work if it is not open." Frank Zappa
          It's my railroad and I'll do what I want! Historically accurate attitude of US Railroad Barons.
          Forever, ridin' drag in railroad knowledge.
          Audi, Vide, Tace, Si Vis Vivere In Pace

          Comment


            #6
            I was looking at GP38-2 #1600. The ENG file has the line "Include( "../NAVS_AUDIO/EMD_8_16-645E/Physics/EMD_16-645E-1.inc" )". I looked at that file and found a line that said MaxExhaust 25.000. I changed the value to 2.000. Now I have a reasonable amount of exhaust. It will be a matter of fine tuning this number till the exhaust really looks good. Who would have thought to look in a sound file to change the engine physics.

            Thanks to all for your helpful comments.

            Fred

            Comment


              #7
              Originally posted by frliss View Post
              Who would have thought to look in a sound file to change the engine physics.
              Yup, that's unusual. That does not look like something Erick would do. I wonder if the file has been edited by someone else before uploading in the library. That's puzzling to me.
              Last edited by R. Steele; 06-07-2024, 04:50 PM.
              Cheers, Gerry
              "A mind is like a parachute. It doesn't work if it is not open." Frank Zappa
              It's my railroad and I'll do what I want! Historically accurate attitude of US Railroad Barons.
              Forever, ridin' drag in railroad knowledge.
              Audi, Vide, Tace, Si Vis Vivere In Pace

              Comment


                #8
                Originally posted by R. Steele View Post
                Yup, that's unusual. That does not look like something Erick would do. I wonder if the file has been edited by someone else before uploading in the library. That's puzzling to me.
                There's nothing unusual about it - as documented in the readme, these sounds are not compatible with MSTS engine files or OR engine blocks that do not specify a 5-1000 RPM max/min with engine tables controlling RPM at each notch. This is because the entire engine RPM range from 5-1000 RPM is modelled so that one sound set can be used for all possible RPM schedules across different locomotives without the need for individual frequency or volume curves for every schedule. It also eliminates the problems endemic to dedicated startup and shutdown clips. For this reason, a set of physics files that sets the correct parameters for retrofitting content made by other developers needed to be provided.

                I can guarantee that the actual root problem here is either a missing dieselsmoke.ace/dieselsmoke.dds or one that is way too opaque. Setting the max exhaust volume to 2 is simply incorrect. The correct maximum value for a 2-stroke engine should be the maximum RPM (in our case, 1000) divided by 40, or 25. This correctly synchronizes the exhaust pulses to engine RPM. The values as entered, coupled to a functioning dieselsmoke.ace/dieselsmoke.dds, should look like this:

                Click image for larger version

Name:	Correct.jpg
Views:	579
Size:	193.2 KB
ID:	2305263 I suspect that a screenshot of the original problem will confirm that the texture used for the particles is the culprit.
                sigpic

                Comment


                  #9
                  Great explanation, Erick. Is there a particular dieselsmoke.ace/dieselsmoke.dds that you recommend? One that would be compatible with other locomotive content? Thanks.

                  Comment


                    #10
                    The default trainsimulations one is fine, as are the light and medium 3DTrains textures. I am also in the process of testing a new set of diesel smoke textures and will probably upload them... eventually.
                    sigpic

                    Comment

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