Question on engine specs since TC3

[IrishTrainlad]

What has exactly changed for steam locomotive engine specs in the games since TC3 in 2008 since thats when i believe steam got a major update (2009, 2010, 2012, TANE and 2022)

i ask this because i see versions of engine specs that are rated for TANE but cant find exactly what changed between TANE and trainz 2012 on the wiki as its not documented, Same goes for Trainz 2019 cant find exactly what changed between TANE and 19

if possible, list the changes between a game

 

[2995Valliant]

I don't think there's ever been an official list of changes anywhere, but from observation and recollection:

TC3/2009/2010/earlyTS12 - all the same as far as I know* and completely different and vastly superior to earlier versions of the game.
TS12 SP1 altered the steam generating capacity of the boiler (apparently it corrected a bug where steam was being added from nowhere from what I recall being told at the time).
I'm not aware of any changes between TS12 SP1 and T:ANE - I didn't alter any of my specs.
TRS19 added and removed a couple of peripheral tags. I don't think the core steam physics were altered.

*At some point between 09 and 19 something altered in relation to the air drag calculations - specs which perform accurately in TRS19 and up won't do more than about 35mph in DCC mode in earlier versions of the game.

 

[IrishTrainlad]

I don't think there's ever been an official list of changes anywhere, but from observation and recollection:

TC3/2009/2010/earlyTS12 - all the same as far as I know* and completely different and vastly superior to earlier versions of the game.
TS12 SP1 altered the steam generating capacity of the boiler (apparently it corrected a bug where steam was being added from nowhere from what I recall being told at the time).
I'm not aware of any changes between TS12 SP1 and T:ANE - I didn't alter any of my specs.
TRS19 added and removed a couple of peripheral tags. I don't think the core steam physics were altered.

*At some point between 09 and 19 something altered in relation to the air drag calculations - specs which perform accurately in TRS19 and up won't do more than about 35mph in DCC mode in earlier versions of the game.

so a Trainz 2019 engine spec if downgraded to T:ANE via config file build number editing would perform fine in cab mode just not DCC from what i gather?

 

[2995Valliant]

Quite possibly.

In the case of my specs I made a large number of alterations to the steam container values between my TS12 SP1 and TRS19 specs (mostly around improving boiler behaviour) and I never tested them in T:ANE so I can't say for sure. Dropping the build number doesn't throw up any errors, but you'd have to test it to see how well it performed.

 

[IrishTrainlad]

Alright, will test later then with a fowler

Update: worked fine actually in AI control which i think uses DCC basically

Update: britannia and 9F specs only ran at limited speeds with britannia going at 17MPH so idk it prob depends on spec to spec than overall

 

[IrishTrainlad]

Also on another note: i've heard that using injectors will decrease pressure and shut the safeties up but that doesnt work for me for some reason

even if i have injectors on full, the pressure doesnt go down (hell i think from memory i think ive had cases where locomotives with water 0% or 100% still were blowing off)

 

[2995Valliant]

Adding water will cool the boiler....but Trainz doesn't calculate the steam used by the injectors so adding water when the loco is stationary will increase the apparent boiler pressure - until you move off when the pressure will drop very rapidly.

Which kuids were you using the for Fowler, Brit and 9F - if they're mine I'd have expected them all to behave the same way.....

 

[marmalade32]

Alright, will test later then with a fowler

Update: worked fine actually in AI control which i think uses DCC basically

Update: britannia and 9F specs only ran at limited speeds with britannia going at 17MPH so idk it prob depends on spec to spec than overall

I drove one of the express sessions in S&C yesterday in Cab Mode. Stalled a bit but a horrid screech started from I believe the AWS so I had to try to get back to speed.
If it's the default spec for the S&C Britannia good luck with keeping speed. She fought me yesterday. Maybe one day i'll not stall at a viaduct and cause a scream of anger from AWS...

 

[IrishTrainlad]

Adding water will cool the boiler....but Trainz doesn't calculate the steam used by the injectors so adding water when the loco is stationary will increase the apparent boiler pressure - until you move off when the pressure will drop very rapidly.

Which kuids were you using the for Fowler, Brit and 9F - if they're mine I'd have expected them all to behave the same way.....

it were the 2019 versions i think
these were the ones i remember acting up in AI control

<kuid:248163:103655>
<kuid2:248163:100146:15>

and the one that i remember working okay under AI control

<kuid2:248163:103575:1>

 

[IrishTrainlad]

I drove one of the express sessions in S&C yesterday in Cab Mode. Stalled a bit but a horrid screech started from I believe the AWS so I had to try to get back to speed.
If it's the default spec for the S&C Britannia good luck with keeping speed. She fought me yesterday. Maybe one day i'll not stall at a viaduct and cause a scream of anger from AWS...

i switched the spec afterwards to <kuid2:248163:100146:14> i think a t12 SP1 version of britannia

 

[2995Valliant]

I'm really surprised that the 9F spec didn't work as looking at the numbers it was one of the last I did to what was fundamentally still the TS12 SP1 standard - the drag and resisitance figures are identical.

The other two had different drag calculations, so may well not have worked.

NB all three of those are now obselete for TRS19/22.

I think it's also worth me pointing out here that none of my specs are designed to work with the default Auran/N3V rolling stocks specs and will not perform well with them as the drag figures are way too high.

Anything up to the early TS19 specs work best with Stovepipe's coach and wagon specs, anything with VB in the description is best used with my VB wagon and coach specs which are heavily based on Stovepipe's specs but with improved braking characterisitics.

 

[IrishTrainlad]

I'm really surprised that the 9F spec didn't work as looking at the numbers it was one of the last I did to what was fundamentally still the TS12 SP1 standard - the drag and resisitance figures are identical.

The other two had different drag calculations, so may well not have worked.

NB all three of those are now obselete for TRS19/22.

I think it's also worth me pointing out here that none of my specs are designed to work with the default Auran/N3V rolling stocks specs and will not perform well with them as the drag figures are way too high.

Anything up to the early TS19 specs work best with Stovepipe's coach and wagon specs, anything with VB in the description is best used with my VB wagon and coach specs which are heavily based on Stovepipe's specs but with improved braking characterisitics.

Ah yeah i think i could have seen VB

Also might have forgotten to adjust the tender's mass as i was tight on time at the moment so i'll resume my experiments later today when i am able to

 

[2995Valliant]

Tender mass won't make a huge difference but tender e-spec will.

 

[IrishTrainlad]

Fair enuff