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Offline Zeno

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Weight handling tests
« on: July 05, 2013, 04:11:55 PM »
Hi there. I've setup three different rail tracks with a couple of locomotives, and I am testing how does the weight system work:

1) Way max weight=18t; locomotive BR-103 weight 114 t / 6 axle = 19 t/axle. Result: locomotive runs with a "too heavy" tooltip, at a speed of 93 km/h (maximum is 200 km/h).

2) Way max weight=18t; locomotive T2000 weight 74 t / 6 axle = 12.3 t/axle. Result: locomotive runs normally at its maximum speed of 160 km/h.

3) Way max weight=20t; locomotive BR-103 weight 114 t / 6 axle = 19 t/axle. Result: locomotive runs at maximum line speed (160 km/h).

4) Way max weight=20t; locomotive LKAB-IORE (x2) weight 180 t / 6 axle = 30 t/axle. Result: locomotive runs with a "too heavy" tooltip, at a speed of 16 km/h (maximum is 80 km/h).

5) Way max weight=50t; locomotive LKAB-IORE (x2) weight 180 t / 6 axle = 30 t/axle. Result: locomotive runs normally at its maximum speed of 80 km/h.

6) Way max weight=50t; locomotive RENFE 251 weight 123 t / 0 axle = 0 t/axle. Result: locomotive runs normally at its maximum speed of 160 km/h.

I think everything works fine, as far as I can see.

Other things I have realized are that the tilting mode seems to work, because the T2000 is a tilting train and can take turns at 160km/h in a 160km/h way, while at least another different train I've tested can't. I wonder though why those same trains can run at full speed in curves when I upgrade the track to a 280 km/h one. Does that make sense? I thought that was something train-dependant, not track dependant...

Offline greenling

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Re: Weight handling tests
« Reply #1 on: July 05, 2013, 04:45:42 PM »
Hello Zeno
have you get makeobj exp too work that you can this said?

Offline jamespetts gb

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Re: Weight handling tests
« Reply #2 on: July 06, 2013, 12:44:57 AM »
Thank you for testing - glad that all appears to work! As to tilting, can you give any further details? Tilting allows for the trains to go at a higher proportion of the speed limit of the way at the corner (a third faster than non-tilting trains). Are your setups identical for each test?

Offline Zeno

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Re: Weight handling tests
« Reply #3 on: July 06, 2013, 06:02:08 PM »
Actually the behavior described was with a non tilting train which turned faster in same curve angle of a faster track. Does the curve speed get calculated as a percentage of the max speed, based on the angle?

Offline jamespetts gb

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Re: Weight handling tests
« Reply #4 on: July 06, 2013, 09:39:11 PM »
Yes - that's exactly how it works.

Offline Zeno

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Re: Weight handling tests
« Reply #5 on: July 07, 2013, 02:13:19 PM »
Uhm, then it works as intended... I don't know how it works in real life, but I'd say that real locomotives have the same maximum curve speed on all tracks; it's not the track quality what improves the train max speed at curves but the bogie structure, number of axles, weight, height, etc., isn't it?

Offline jamespetts gb

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Re: Weight handling tests
« Reply #6 on: July 07, 2013, 02:17:37 PM »
The idea behind this, for the shallower curves (this does not affect the steeper curves) is that higher quality track is likely to be laid on a smoother course and/or have cant to allow higher speeds. This is partly because of the fact that we do not have a realistic range of angles available in Simutrans, so it is difficult to work out what the equivalent of various sorts of shallow corners actually is in real life.