BVE: Train.dat Acceleration Problems

[TrainUKer]

Hi all - I need help!

I have located a graph showing the acceleration rates of the CR4000 tram, and I am starting to build a 'train' for my tramlink route. However, I do not know what to input, as I dont really understand how this section works. The deceleration looks simple - I have calculated that from 80km/h to 0 takes 18 secs, therefore the deceleration is 4.4. Have I put in the correct figure?

As for acceleration, I have got the following figures, but I dont know what to do with them. I would like to have 3 acceleration levels (ie p1, p2, and p3)

0-20km/h in 5 secs
0-40km/h in 11 secs
0-60km/h in 19 secs
0-80km/h in 40 secs

Any help is appreciated.

Thanks in advance,

Ricky.

[Take the tram_2]

RE: Train.dat Acceleration Problems

>Hi all - I need help!
>
>I have located a graph showing the acceleration rates of the
>CR4000 tram, and I am starting to build a 'train' for my
>tramlink route. However, I do not know what to input, as I
>dont really understand how this section works. The
>deceleration looks simple - I have calculated that from 80km/h
>to 0 takes 18 secs, therefore the deceleration is 4.4. Have I
>put in the correct figure?
>
>As for acceleration, I have got the following figures, but I
>dont know what to do with them. I would like to have 3
>acceleration levels (ie p1, p2, and p3)
>
>0-20km/h in 5 secs
>0-40km/h in 11 secs
>0-60km/h in 19 secs
>0-80km/h in 40 secs
>
>Any help is appreciated.
>
>Thanks in advance,
>
>Ricky.

Hiya.

Excellent mews there for you to have these timings!
Basically coding a train.dat requires trial and error and I'm constantly tweaking mine.

My .dat looks like this....

BVE2000000
#ACCELERATION
2.3,0.14,160,80,3.97 - P1
4.6,0.14,160,80,3.98 - P2
7,0.13,160,80,3.99 - P3
0,0,0,0,4 - P4
0,0,0,0,4 - P5
0,0,0,0,4 - P6
0,0,0,0,4 - P7
0,0,0,0,4 - P8

I guessed it was 7 as my maximum acceleration rate on teh simple factor of running the train on straight track and timing it with a stopwatch to 20, 40 and 80 kph. Then when I ahd my maximum figure I divided it by 3 to get throttle 1 and timesed it by 2 to get throttle 2.

As for 0.14 and 0.13 I'm not sure, and the 160 was simply double 80, and the 80 is the max speed teh train will ever get, 3.97 is the brakes...all very good so near to 4!

#PERFORMANCE
9 - Dunno why, just seemed right!
0.58 - Adhesion pretty good inbetween

[TrainUKer]

RE: Train.dat Acceleration Problems

Thanks Nick!

Your explanation was very helpful. I have used the figures you have suggested, which I will tweak slightly, but thanks for providing me with a starting block.

Ricky