Notice to all visitors and members of the Train-Sim.Com message forums:
If you plan on using a signature banner in your posts, we would like to remind you that there is a maximum size for banners. That maximum is 450 pixels wide by 120 pixels high, and not to exceed 25k. Your compliance is appreciated. FORUM RULES Problems? There are two common reasons for problems with logging in and posting messages. The first is that you are running a firewall that prevents your messages from being sent to the server. The other is that you have cookies disabled; the DCForum software requires cookies to work properly.
Previous Topic | Next Topic
Printer-friendly copy Email this topic to a friend
Reading Topic #7254
We know from the comment above the engine variables what they are suppose to stand for, but how are they dervived?
EX:
GWR Green Tank 4-4-2
Comment (fire temp,water mass, boiler pressure, water level, tender_water_mass, tender_coal_mass, smoke_quantity, fire_condition, coal quality)
EngineVariables (760 1000 3000 160 0.5 13000 6600 400 1 2 )
Thanks for any help
Teacherpat
Printer-friendly page | Edit | Reply | Reply With Quote | Top
Coal Quality? It's possible to make bad coal with MSTS?
____________________________________________
Shawn K, shawnssk@yahoo.com
Texture dude for TKW & YLW, Forum Mod. Feel free to e-mail me.
The NYO&W.. Running from somewhere to nowhere, But never forgotten
____________________________________________
READ the forum rules!
Have a general question? Try Google
Looking for an answer to a Train-Sim Question? Search the Forum Archive First
Looking for a certain Trainsim add-on? See Here First!
Printer-friendly page | Edit | Reply | Reply With Quote | Top
Yes. Coal properties vary by huge amounts. Boilers were designed with this in mind. Kevin Arceneaux
DEFAULT IS FOR DUMMIES
Cry havoc and Let slip the dogs of war.
Lone Wolf Activities Forum and Activity Packs are on www.3DTrains.com
Printer-friendly page | Edit | Reply | Reply With Quote | Top
There are actually 10 Engine Variables, (There may be even more, but what they are is burried in the minds of Kuju)fire temp: This is the initial temperature of the fire, if you are starting the locomotive from the engine house (engine shed) you may want to use a low figure of say 700 deg F, if you start from the station on a train you may wish to use 900 deg F
fire mass:This is the quantity of coal in the firebox at the start, usually somewhere around the IdealFireMass is goodwater mass:This is understood to be the weight of the volume of water in the section of the boiler covered by the gauge glass, so I use MaxWaterMass divided by 1.3 for this entry which should correspond to a full gauge glass on level track.boiler pressure:The initial boiler pressure, I usually set this at 95% of the Max Boiler Pressure, but like fire temp a lower value for starting from the engine housewater level:1 = full gauge glass and seems a little redundent since "water mass" appears to have the same effecttender_water_mass:The number of pounds of water in the tender at start.tender_coal_mass:This is misnamed in the simulator, it appears to be a factor and 1.0 is a good value, but it will require a couple of other changes to get the best results which should allow clean firing without the thick black smoke when firing manually as follows:In the main .eng parameters:ShovelCoalMass ( 10lb )
SteamFiremanMaxConstantFiringRate( 3000 )SteamFiremanMaxPossibleFiringRate( 6000 )In the engine controllers:Shovel ( 0 1 1 0
NumNotches ( 6
Notch ( 0 0 Dummy )
Notch ( 0.25 0 Dummy )
Notch ( 0.5 0 Dummy )
Notch ( 0.75 0 Dummy )
Notch ( 1 0 Dummy )
Notch ( 2 0 Dummy )
)
)
smoke_quantity:This appears to be cosmetic, I have been using 100fire_condition:How effectivly the fireman is at keeping the fire burning for optimum performance I use factors from 0.8 to 1.0 depending on fireman's presumed skill.coal quality:This refers to the BTU's generated by the coal and is expressed as a factor, Best Welsh Steam Coal which is one of the world standards although not much is mined today gets a factor of 0.9, normal locomotive coal 0.85 and if you burn lignite or some other low grade you may go down to about 0.6As always, before screwing with the .eng file, save your original file elsewhere in case you need to recover it
Supergoods
[ Home | MSTS Forum | MSTS FAQ | File Library ] Copyright © 2002 by Nels Anderson. All Rights Reserved.
Restored from the Train-Sim.Com archive, captured October 28, 2003. About this archive.