Gears too high RPM + Dynamic Brake when switched cab

[Sebastian Juthe]

When DMU and with combined throttle/brake, the gears give too high RPM.
So, immediately when I activate gear 1, the projected speed goes up to about 200 kph, and that is only at 13% power.
This bug came after the X.1656 release a good few weeks back.
Also, when switching cab and going in the other direction the Dynamic Brake actually adds more power rather than braking the train.

The IC3 train with the same gearbox setup as my personal mod.
http://www.tog-sim.dk/downloads.php?did=803

The same thing occurs with the above download.

[Sebastian Juthe (s-juthe)]

It seems OR does not honor the different gearbox levels, it only uses one gear level, e.g 4. That explains the loss of power in climbings as well.

So, in this specific situation, it's either level 4 or N.

[Matej Pacha (matej-pacha)]

>>So, immediately when I activate gear 1, the projected speed goes up to about 200 kph, and that is only at 13% power.<<
I cannot get the same experience - everything works just fine: after 13% throttle setting, the projectec speed is about 7 kph. RPM always stays between min and max, except of the starting-up period when the clutch is active. Can you please check v1734 or later?

The dynamic brake problem is related to the direction vs. flipped flag and has been changed recently, what introduced this bug. Will have a look at it.

[Matej Pacha (matej-pacha)]

There is another issue with this DMU:
* MaxForce = 250 kN
* Mass = 45 t
you can never get 250 kN from 45 t vehicle with adhesive gauge. This is just too high. I think that 250 kN is for a whole DMU (two diesel cars).

the gearbox setting says:
* MaxPower = 700 kW
* GearBoxDirectDriveGear( 1 2 3 4 5 6 )
* GearBoxMaxSpeedForGears( 31 44 51 88 100 113 )
* GearBoxMaxTractiveForceForGears( 230kN 200kN 150kN 120kN 85kN 80kN )

In ORTS we are using 81% of torque at 100%RPM, what means that the forces at max speeds are:
MaxSpeeds converted into mps: 13.85 19.67 22.79 39.34 44.7 50.51
TractiveForces @ maxSpeeds: 186kN 162kN 121kN 97kN 68kN 64kN
Power result:

[Matej Pacha (matej-pacha)]

Power result: 2582kW 3186kW 2770kW 3824kW 3078kW 3273kW

Where is this power comming from? The two 700kW diesel engines?

[Sebastian Juthe (s-juthe)]

So, it could be a configuration problem?
It's odd though, it does not behave like this in MSTS or MSTSBin.
So what you're saying is that lowering the unrealistic kN would somewhat fix the issue here?

[Matej Pacha (matej-pacha)]

I'm just saying that MSTS allows these settings to be set and no error is produced. And players are satisfied, because their train is moving.
1) unfortunately, we don't have any MSTS code to see how such data are processed. Thus, the ORTS behavior will always be different from MSTS.
2) fortunately, we don't have any MSTS code. Thus, we are doing our best (avoiding MSTS mistakes) to have the simulator to be much more real than MSTS is.

There might be another difference between MSTS and ORTS. I've noticed that MSTS uses the power to be concentrated in the driven car instead the power is distributed to more cars (like METRO cars or the original Series 2000 from Tokyo-Hakone line). This leads to the ORTS cannot use this power, because the driven car is much more lighter than the whole train = the adhesion condition is broken. I'm sure there are a lot of fake settings around the MSTS world we will be facing.

Anyway - back to your problem. Do you have access to the ORTS SVN to get the most recent build? If so, can you please check out v1734 or higher, if the problem with the predicted speed remains? You can also watch the gears changing with the train speed (gearing up with the next GearBoxMaxSpeedForGears value found). I'm not able to reproduce your experience. The dynamic brake issue is confirmed and I'm working on it now.

Thank you.

[Matej Pacha (matej-pacha)]

v1736