Wagon especs - Emergency applications and other Q's

[H222]

Hi guys, myself and a couple of others have been trying to improve some of our wagon/physics handling in Trainz. It is something that is severely underlooked at, and makes for a heck of a lot more immersive play when trains actually roll and brake a bit more prototypically. I have a couple of questions that some may or may not be able to help with.

Has anyone had any luck in "forcing" a train's BP/TP down to 0 quicker when an emergency application is made? Anyone know what Tag that is influenced by in the wagon's espec? Prototypically, most locos with a 26-L or newer can dump the entire train's brake pipe very, very quickly

The other question is in relation to the independent/bail off feature on loco's and avoiding it creeping up after you've bailed off the first time. Prototypically, once a minimum is made on a self-lapping brakestand and the bail off is held down for a couple of seconds, the independent will stabilize at 0, and will not creep back on unless you make a further reduction (then the expectation is you bail off again). In trainz, if the Train Pipe or Equalising Res is still reducing the independent will definitely reapply, and often it will reapply again even once your EQ and TP have equalized. Is there a tag in trainz that can increase the power or length of the #4 pipe/Bail off feature? Or is that something that may just need scripting to "force" one bail off command to last several seconds or something?

Cheers
Jamie

 

[2995Valliant]

I've done a very similar exercise for UK rolling stock not so long ago - look for a loco and wagon specs with VB in the title under my kuid (#248163) and try the values I've used in there as a starting point.

Although set up to replicate the sort of delays on a vac. system, I think you might find them closer to what you are looking for. Altering any tag with "vent" in the description to a larger value will help with the brake response time.

Also, getting the brake ratio values right is critical - the default 55000 is way over the top for most UK stock, but probably not so far out for the stuff I imagine you are looking at.

For a loco, take the weight on the braked wheels in kg and use somewhere between 85 - 100% of that figure. Wagons are more complicated as IRL modern wagons normally have different brake settings according to whether they are loaded or not, so It's either two different specs (at 100% of the respective weights) or just average the empty and loaded mass and use that figure. For steam era stuff in the UK that's close enough, but for modern high capacity bogie wagons it may not work so well.