Diesel Mechanical Locomotive
#11
Posted 13 February 2022 - 10:13 AM
#12
Posted 13 February 2022 - 10:53 AM
darwins, on 13 February 2022 - 12:58 AM, said:
Britain (and USA) - horsepower hp = 0.7457 kW
France - cheval vapeur cv and Germany - pferdestarke ps = 0.7355 kW
We recently had a request (from Frank Stendel) for German Horsepower and also Atmosphären-Überdruck (atü).
Given Open Rails approach to units, they should be easy to include.
#13
Posted 13 February 2022 - 12:52 PM
#14
Posted 13 February 2022 - 12:56 PM
Hello.
There is something wrong with the calculations here. If the Throttle is 50%, the engine speed should be 1000Rpm. All the more so because in such old locomotives, a simple rod or bowden wire connected the controller to the diesel engine feeder.
If I count 1500Rpm instead of the maximum speed of 1350Rpm then if Throttle is 50%, the speed should be 1063.
How will this become 1402Rpm?
Sincerely, Laci1959
#15
Posted 13 February 2022 - 02:17 PM
The throttle works on a simple principle of controlling the admission of fuel to the engine. More fuel produces more power and torque. The speed of the engine depends on the load. So if the load is light the speed will continue to increase. If the load is heavy then the acceleration is slower and the maximum rpm achieved is less.
The train, bus or truck should be able to accelerate to the maximum speed in any gear with less than full throttle as shown in diagrams like the one on this web page:
Torque Curves
(In the motor car you do not need to push the accelerator all the way to the floor before you can change up a gear.)
I have attached some papers I used to try to help Peter design the ORTS model for the admission control throttle.
Attached File(s)
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Engines.zip (9.08MB)
Number of downloads: 202
#16
Posted 13 February 2022 - 07:08 PM
darwins, on 13 February 2022 - 10:13 AM, said:
Existing MSTS or Legacy configurations with GearBoxOperation( Manual ) will continue to use legacy code. To use the new functionality, ORTSDieselTransmissionType ( Mechanic ) needs to be included in the ENG file.
cjakeman, on 13 February 2022 - 10:53 AM, said:
Given Open Rails approach to units, they should be easy to include.
Is this for input of parameters only, or also for display in the HuD? AT the moment as far as I am aware we only display in metric, imperial uk, and imperial us.
#17
Posted 13 February 2022 - 07:19 PM
Weter, on 13 February 2022 - 12:21 AM, said:
This is an existing MSTS parameter so it will be the same as for MSTS. I am not sure how much of the MSTS functionality works in OR.
#18
Posted 14 February 2022 - 12:23 AM
Quote
I guess because of the video of the GANZ motor car.
darwins, on 13 February 2022 - 02:17 PM, said:
I was a little scared to exceed the spectacular speed.
I will set ORTSDieselEngineGovernorRpM to max speed (1350Rpm). The GANZ description gives 1000Rpm the speed available in each gear, so I will set the DieselEngineMaxRPM to 1000Rpm.
The description defines the speed to be achieved on a given incline with 1 trailer. I'll see what I get with it.
#19
Posted 14 February 2022 - 01:07 AM
#20
Posted 14 February 2022 - 01:36 AM
If " ORTSGearBoxType (B) " is ORTSMainClutchType (Friction) then I don't think you should switch. On the one hand because the gears are tensioned, on the other hand I think there is a mechanical latch that does not allow shifting. Protects the transmission from crashes. Using the freewheel [ORTSGearBoxFreeWheel (1)] also requires full throttle.
The GANZ transmission works in two steps, almost like a manual car transmission for a person. There is a zero position between two consecutive gears.
Is this possible?