Input Train Performance

The free version users can try this function but cannot save data.

Click 'Input Train Performance'.

The dialog box shown below pops up  and you select the running resistance type(1), input the  train pfofile(2) and numeric data(3).

[Open] button opens the existing data file.

[Save] button saves the inputted data to a file. The data folder is C:\Users\your user name\Documents\NotchManMini\Train\Yours

[Show Resistance] button shows the resistance curve inputted by the user.

[Show Performance] button shows the performance curve inputted by the user.

Usage of the grid control on this dialog box


Running Resistance

At first, select the running resistance.
There are 14 built-in running resistance equations and 2 user-defined data.

"Direct Input" enables users to input the numerical resistance force.

"User-defined (R=A+BV+CVV) enables users to input coefficients of the speed resistance equation, A, B and C.
Note that these coefficients differ according to the unit system used in the equation.
Units used in this application is specified  here.

Required fields on the right side vary according to the selection of the running resistance.

Users must fill out these field completely.
Units used here are also used specified here.

Train profile

Coefficients A, B and C are coefficients used in the standard running resistance equation  (R=A+BV+CVV), R is a running resistance and V is a train speed.
Note that these coefficients differ according to the unit system unit system used in the equation.
Units used in this application is specified  here.

"Track Gauge" specifies the trains track gauge type. 0 means narrow gauge and 1 means standard gaute.

"Moment of Inertia" specifies the ratio of the train's rotational inertia against the linear inertia expressed as a percentage. Usually, a simple trailer has a value about 5% and an electric multiple unit with large and heavy motors has a value about 10%.

Speed-tractive effort data input

The inputted data are linearly interpolated. So at least two data are required.

The most simple sample is the single speed direct drive turbine powered train, as a two shaft gas turbine has a linear torque characteristics with right shoulder dropping.

In this case, tractive effort data are only two, speed 0 and speed 140km/h (red arrowed in the above schema). The derived performance curve is shown below.

But other trains have more complicated tractive effort curves and much data must be inputted.
For example, an EMU shown below has two parts of the torque curve. At the speed range of 0 to 146km/h, the torque is flat and the more speed increases, the torque decreases, but not linearly. 

Below is the input sample, the flat part consists of two data (0,5000) and (146,5000). The decreasing part consists of 6 data.

The derived tractive effort curve is shown below.

This may be applicable to a rough simulation. If you wish more precise simulation, you should input more data.


Speed-running resistance input - Direct input mode

You can input numeric data directly. The next schema shows the added running resistance data to the above sample train.
The red-underlined part is inserted for the running resistance data because the starting resistance is far stronger than the rolling resistance.

The derived  performance curve is shown below.


Speed-running resistance input - Coefficient A, B and C input mode

In this mode, the column of the direct input running resistance is grayed out and you can get the running resistance by the equation R=A+BV+CVV, so coefficents A, B and C must be specified. 

 Click [Show Performance] button and then the dialog box shown below  pops up.
In this dialog box you can modify coefficients at the edit boxes located at the top of the graph and the change is directly reflected on the graph.


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