Trainz Calculations for Loaded and Empty Railcars

[torino72]

How does Trainz calculate the empty and loaded weight of a railcar?

3 Examples:

Railcar 1 has a mass of 27000 and load size of 100000. It loads Grain HP which has a mass of 1. Trainz says the empty weight is 27 tons and the loaded weight is 127 tons. This seems simple enough. 27000 = 27 tons and 100000 x 1 = 100 tons. 100 + 27 = 127 (the loaded weight in tons).

Railcar 2 has a mass of 80000 and load size of 90000. It loads Grain HP which has a mass of 1. Trainz says the empty weight is 80 tons and the loaded weight is 170 tons. 80000 = 80 tons and 90000 x 1 = 90 tons. 80 + 90 = 170 (the loaded weight in tons).

Railcar 3 has a mass of 31025.7 and load size of 87996.9. It loads Cement which has a mass of 3.12. Trainz says the empty weight is 34 tons and the loaded weight is 336 tons. How does 31025.7 = 34 tons and how does all this calculate out to a loaded weight of 336 tons?

Obviously there are some very overloaded hopper cars here. As to the weights, just when I thought I has it figured out, I don’t.

 

[smash]

I dont know if this helps but trainz uses kilos not U.S. pounds and tons.

Edit: Look at this thread.
http://forums.auran.com/trainz/showthread.php?t=10347&highlight=maxweight
It Might shed some light on your question.
Kenny

 

[Pendolino]

How does Trainz calculate the empty and loaded weight of a railcar?

3 Examples:

Railcar 1 has a mass of 27000 and load size of 100000. It loads Grain HP which has a mass of 1. Trainz says the empty weight is 27 tons and the loaded weight is 127 tons. This seems simple enough. 27000 = 27 tons and 100000 x 1 = 100 tons. 100 + 27 = 127 (the loaded weight in tons).

Railcar 2 has a mass of 80000 and load size of 90000. It loads Grain HP which has a mass of 1. Trainz says the empty weight is 80 tons and the loaded weight is 170 tons. 80000 = 80 tons and 90000 x 1 = 90 tons. 80 + 90 = 170 (the loaded weight in tons).

Railcar 3 has a mass of 31025.7 and load size of 87996.9. It loads Cement which has a mass of 3.12. Trainz says the empty weight is 34 tons and the loaded weight is 336 tons. How does 31025.7 = 34 tons and how does all this calculate out to a loaded weight of 336 tons?

Obviously there are some very overloaded hopper cars here. As to the weights, just when I thought I has it figured out, I don’t.

Railcar 1 is OK.

Railcar 2 has the "mass" tag in the config set to an excessive value; it shoulf be between 25,000 and 30,000. Perhaps interactivity has been added as an upgrade and the value has not been properly modified.

Railcar 3 is puzzling: it looks like Trainz is doing some very rough rounding when it calculates the values. The overall load weight should be equal to 87,996.9 [litres] x 3.12 [kilograms/litre] = 274,550 kilograms, plus 31,025.7 = 305576 kilograms. The maximum amount of cement should be lowered to about 35,000 litres (even if the car is capable of carrying 90,000 litres, axle load would be 75 tons ) . Usually, hoppers are capable of transporting materials with very variable specific mass, so it is better to specify different maximum capacities for every type of load in the "queues" container.

 

[stagecoach]

A lot of wagons have just copied the config from an identical wagon and not allowed for the goods it carries. The same thing happens if you add products to a wagon that it was not realy built for. Question, 1 ton of Feathers or 1 ton of lead What would you use to transport them.

 

[whitepass]

The mass and load should be whole numbers so car 3 has errors that CM will not find.

 

[backyard]

I found this...

Hello Torino72, you are right in checking the mass and load weights for every piece of rolling stock.

The config.txt file mass & load weights are in kilograms whether the load is dry bulk or liquid.

The weights specified in game are metric tons.

So, your 127t(metric ton) car weighs 279,992-lbs. or 139.996-short tons. That would of course be 127000kg.

Here is a neet converter from Bell Software called Calc-It. Download the installer & run as administrator.

You will be using the tabs Mass, Capacity & Volume, plus the other tabs from time to time for whatever.