[pgs]

Good night.
I have problems with the air compressor in all vehicles.
MP produces air very slowly, in absolutely all trains.
Do you have any idea what could be happening?
Thank you so much

[railguy]

OpenRails is designed to emulate real world air brake system behavior more realistically. For example, in real world railroading (U.S., in my example), an 80-100 car train can take up to 20-40 minutes to fully pump up the air on the train from 0 psi to fully charged. Another thing that OR emulates that is difficult to avoid: when the player couples his/her locomotive to a long cut of cars, when the air hoses are connected, the train line pressure can drop sufficiently to initiate an emergency brake application, emptying the air reservoirs on the cars completely. At that point, the locomotive air compressors much recharge the entire train line. Looking at the Alt-F5 screens will show if the cars are "in emergency." The shortcut "cheat" is to use the "initialize brakes" keystroke (Shift + /), which connects all brake hoses, sets all valves correctly, and instantly fully charges the air reservoirs. MSTS never modeled air brakes realistically--to be blunt, MSTS was mostly a "game"; OR is much closer to being an actual simulator.

[Weter]

The other tip: mechanically-driven compressor's efficiency is already tied with diesel's rotation speed, IIRC
You can set revercer to zero and increase throttle
(in real life, only some shunters have fourth, "Idle" notch of revercer for that, because "Neutral" revercer's position locks main controller's handle on it's "Zero throttle" notch, while reverce handle can be removed for change cab/immobilize locomotive).

[pschlik]

railguy, on 11 March 2024 - 07:42 AM, said:

Another thing that OR emulates that is difficult to avoid: when the player couples his/her locomotive to a long cut of cars, when the air hoses are connected, the train line pressure can drop sufficiently to initiate an emergency brake application, emptying the air reservoirs on the cars completely.

Mitigated this ages ago. I don't use the NewYear version so I don't know if that change has been brought over...but I would guess it has since this was taken care of months ago. Anglecocks will automatically open nice and gradually which will prevent an emergency application from killing all your brake pipe pressure, assuming the relevant options have been set to sensible numbers.

[pgs]

Good night.
I am a train driver in real life, so I know well how the brake system works.

For the purposes of filling and emptying the brake pipe, I adapt certain .eng so that they resemble reality as much as possible, but the loading of the main tank by the compressor is extremely slow from time to time.....

Obviously with the Shift+/ command I initialize the brakes, but I lose 100% of reality.
Also otherwise, if I brake twice hard, the MP drops below the threshold and the brake pipe is not able to reach the pressure to release the brakes.

Let's see if anyone knows or can give me a hand.

Thank you so much.

[pgs]

Hello, good afternoon.

I use the MG 150.3 version.

I'm testing in MG and in the official version and the same thing happens to me....
Both with own vehicles and with added ones...

Tnks.

[pgs]

Good afternoon.
While doing tests, I have noticed that changing the .eng file of a locomotive solves the problem I have with the compressor.
I don't know if it happens to others... (it didn't happen to me before)
It seems that the new versions, both MG and official, ignore this line:
AirBrakesAirCompressorPowerRating()
I have tried to eliminate it and the compressor does not work.
If I replace it with this other line:
ORTSMainResChargingRate() my problems disappear, adjusting the value more or less produces a realistic load of the MR.
From that moment on everything is solved in that vehicle.
I have also noticed that many electric locomotives have the line value: AirBrakesIsCompressorElectricOrMechanical( 1 )
And I have doubts.
1=Electrical or 1=Mechanical
IOW,
Value 1=electric
Value 0=mechanical
That's my doubt...
I don't know if it's like that or the other way around...
Greetings

<admni comment
It would be great, if You would care to correct discovered mistakes in Your previous posts, as well, as merge You adjacent posts together.
That's the way, posts are easier to read for others, and space usage on page will be more efficient.
In some cases, posts have to stay separate, but it's quite rare, so, please, try to be accurate and sensible.>

[Weter]

Hello.

Quote

AirBrakesIsCompressorElectricOrMechanical()
Value 0=electric
Value 1=mechanical

Manual by Rudolf Richter says, that's so.
Mechanical is driven by crankshaft (so efficiency SHOULD depend on throttle setting)
Electrical is being driven by dedicated motor) has constant power.

[cesarbl]

MSTS TechDocs tell the opposite (0 = electric, 1=mechanical), and that's also how OR is behaving.

[slipperman]

Hi Weter,

Sorry, mate, but you've got it wrong!
Attached is a screenshot from Rudolf Richter's manual which shows it agrees with the TechDocs document.

Cheers,
Ged

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