How to Change Smoke Color

[sumit7tnp]

Dear All

Greetings..!!!

Thank You for your kind support extended to me in past.

I wanted to understand the procedure to change color of steam smoke from white to black.(However it is not real but i would like to do it)

My requirement is to change steam color from white to black in attached file.

If any senior can guide me, Will be a great help.

Before asking here , What i studied is :- In case of steam we have following lines in .eng file

SmokeCombustion ( 1 )
SteamSmokeUnitsPerPoundOfFuel( 0 )
SteamMaxSmokeUnitsReleaseRate( 1 )

In case of diesel smoke , I found this in .eng file
DieselSmokeEffectInitialMagnitude ( 0.5 )
DieselSmokeEffectMaxMagnitude ( 1.5 )
DieselSmokeEffectInitialSmokeRate ( 0.1 )
DieselSmokeEffectMaxSmokeRate ( 8 )

So in my case when I want to change steam color from White to black, Is it really possible to do or not.

Kindly advice.Or provide any manual where i can study how to do it.

Thanks & Best Regards
Sumit Mehrotra

[ebnertra000]

Steam engine smoke's color is dependent on the state of the fire in the boiler. If I recall, it will only be black if the fire isn't hot enough, or if there's too much fuel and it's incompletely burning. To my knowledge, it cannot be manually changed to a certain color.

As for diesel engines, if you want to see what OR can do with diesel figures, including exhaust color, download one of Tyler Bundy's recent engine sets, like the GP11s uploaded a week or two ago. I know those have the smoke color changed, but I don't recall offhand how it's done (those are on a different computer)

[R. Steele]

Just to backstop ebnertra000 post...the characteristics of diesel smoke for OR are contained in the "ORTSDieselEngine" block of parameters as follows: [from IC_GP11_8701.eng found in OpenRails folder ---TS library file ic_gp11_90s_pk2.zip]

ORTSDieselEngines( 1
		Diesel(
		     IdleRPM ( 275 )
			MaxRPM ( 800 )
			StartingRPM ( 100 )
			StartingConfirmRPM ( 303 )
			ChangeUpRPMpS ( 45 )
			ChangeDownRPMpS ( 39 )
			RateOfChangeUpRPMpSS ( 10 )
			RateOfChangeDownRPMpSS ( 5 )
			MaximalPower ( 1380kW )
			IdleExhaust ( 1 )
			MaxExhaust ( 3 )
			ExhaustDynamics ( 2 )
			ExhaustColor ( 206B787D )
			ExhaustTransientColor ( 40212324 )
			DieselPowerTab (
				275       0
				341     69000
				406     172500
				472     345000
				538     532680
				603    662400
				669    873540
				734    1210260
				800    1380000
			)
			DieselConsumptionTab (
				0       0
				275     3.5
				800    111.1
			)
			ThrottleRPMTab (
				0   275
				12.5   341
				25  406
				37.5  472
				50  538
				62.5  603
				75  669
				87.5  734
				100 800
			)
			DieselTorqueTab (
				0       0
				275     25000
				800    200000
			)
			MinOilPressure ( 16 )
			MaxOilPressure ( 50 )
			MaxTemperature ( 120 )
			Cooling ( 3 )
			TempTimeConstant ( 720 )
			OptTemperature ( 71 )
			IdleTemperature ( 55 )
			)
		)

AFAIK the complete block must be included in the engine portion of the include file found in the OpenRails folder.
The lines you are interested in are these:
IdleExhaust ( 1 )
MaxExhaust ( 3 )
ExhaustDynamics ( 2 )
ExhaustColor ( 206B787D )
ExhaustTransientColor ( 40212324 )
Exhaust Color and TransientColor use standard HEX to express the values. For more information please review section "8.2. Engine – Classes of Motive Power" page 82 in the manual.

Adapting portions of the diesel engine block (like the exhaust portions) for use in Steam is something I'm totally unfamiliar with...I wonder if it could be done?