MOTA User Manual Additions --  for versions 4.4 / 4.42 / 4.44
        These are now superseded by the latest version 6.00 .

2. Installing MOTA
MOTA and all of its attachments were written originally for DOS and run best in this environment. All that is needed is to copy the files on the two distribution disks into a directory on the "C" drive and you are ready to run the various programs supplied. The same is true of WINDOWS environments. There is a file on the distribution disks called "install.bat" which may be used to create a new directory named MOTA444 on the "C" drive and copy all the files on the distribution disks into it.
To use the auto-install, move onto the "A" drive with either disk loaded, then type "install" and then press "Enter" in DOS, or click the "install" icon in WINDOWS 3.x or in WINDOWS '95. You will be prompted to change disks at the appropriate time.
If you want to install MOTA into a directory other than C:\MOTA444 do so manually, but first, please read the remainder of this item. If MOTA version 4.44 is an upgrade to a previous version you had purchased, we consider it advisable to install the new version in a new directory and NOT to simply overwrite the files of the previous version. This is because the format of the Engine Data Files has changed with this new version of MOTA and so, by retaining your old version in a separate directory, you retain the ability to examine your old Engine Data Files. This may be very helpful when you create replacement Engine Data Files using this MOTA version 4.44 upgrade. The benefit of the change in the Engine Data File format is explained under the README menu selection: "Update Details - v4.42 to v4.44"

3. Users with Windows 3.x - Running MOTA under DOS
If your computer runs under the Windows 3.x operating system, install MOTA as described above and then, to run MOTA, select the "MSDOS" icon from the control panel. When the DOS prompt appears, type "CD \MOTA444" with a space between the "CD" and the "\" and press "Enter" You are now ready to run MOTA under DOS by typing "MOTA" and pressing "Enter". The procedure for printing graphics screens is the same as that outlined in section 5 below.

4. Users with Windows 95 - Running MOTA under DOS
The recommended method of running MOTA once it is installed is to go to the SHUTDOWN button under the START menu, and then select "RESTART COMPUTER IN MSDOS MODE". This should bring you to the C:\WlNDOWS prompt. Type "CD \MOTA444" with a space between the "CD" and the "\" and press "Enter". You are now ready to run MOTA under DOS by typing "MOTA" and pressing "Enter"

5. Printing Graphics Screens Under DOS
MOTA allows you to obtain a black/white reproduction of a graphics screen. With a graphics screen displayed, press the F2 key to provide a black/white display on your screen. Now press the "Shift PrtSc" combination to output this screen to your printer. The colour display is restored by again pressing the F2 key once printing is completed. To output a graphics screen to your printer successfully, first ensure that your "autoexec.bat" file contains either the command C:\DOS\GRAPHICS or the command C:\DOS\GRAPHICS [switch], where the "switch" is dependent upon the printer you have connected to your computer system. For many dot matrix and inkjet printers no switch is required. As an exampie, if you have a Hewlett-Packard LaserJet Printer, the command you require in your "autoexec.bat" file is C:\DOS\GRAPHICS LASERJET. If you do need to modify your "autoexec.bat" file in this way, be sure to reboot your computer before attempting to print a graphics screen.

6. Running MOTA under WINDOWS 95 / 98
MOTA will run under WINDOWS 95 / 98, but you may notice some flickering as the screens change between the various options. If you wish to pursue this option, start by creating a shortcut to MOTA. To do so, click on the "Start" button and go to "Programs", then select "Windows Explorer". Click on the folder (directory) that contains your MOTA program files and then click on MOTA.EXE. Next click on "File" and select "Create Shortcut". This will put a shortcut command in with your MOTA files. Click on this and then drag it up and drop it onto the Desktop, the folder at the top of the All Folders list.

It is also necessary to change the Properties of the MOTA simulator, MOTA SIM.EXE. To do this move to the MOTA444 directory and click once on MOTA_SIM.EXE. Select "File" then "Properties" and then "Screen". Now make sure that the "Full Screen" option is selected (this is the default window on many systems). If a change is made be sure to select "Apply" before closing the screen. You can now run MOTA by double clicking the MOTA icon on the Desktop.

7. Printing Graphics Screens in Windows 95 / 98
MOTA aIlows you to obtain a black/white reproduction of a graphics screen. With a graphics screen displayed, press the F2 key to provide a black/white display on your screen. Now press the "Shift PrtSc" combination to output this screen to your printer. The colour display is restored by again pressing the F2 key once printing is completed.

Before you attempt to make use of this feature complete the steps which follow to set up your computer.
To allow any DOS program to print a graphics screen in Windows 95 / 98 a copy of the DOS programs 'graphics.com' and 'graphics.pro' should be present in the WINDOWS directory on the C:\ drive.
If you do not have these programs, a copy from the DOS directory of another computer will do. You will need to know the version of the DOS providing these two graphics programs, so, with the source computer running under DOS, enter the command "Ver" and make a note of the version of DOS displayed.
Next, the line which follows should occur in your CONFIG.SYS file
DEVICE=C:\WINDOWS\SETVER.EXE
Add this line if it is not already present.
This line "enables" the DOS emulation program SETVER which must now be set at the version of DOS from which the two graphics files were copied. So, from the START button in the lower left of your Windows 95 / 98 desktop, select "Shut Down Computer" and then select "Restart in MS-DOS mode" you will be given the prompt C:\WINDOWS>. To this prompt, and with the "_" character indicating a space, type
_SETVER_C:\WINDOWS\_GRAPHICS.COM_6.00
and then press Enter. ( in the case where the two "graphics" programs were copied from DOS version 6.00)
A warning message will be displayed, followed by the message "Version table successfully updated" and a note that this will take effect the next time the computer is restarted.

Finally, to output a graphics screen to your printer successfully it is necessary that your WINDOWS "autoexec.bat" file contains either the command C:\WINDOWS\GRAPHICS or the command C:\WlNDOWS\GRAPHICS [switch] where the "switch" is dependent upon the printer you have connected to your computer system. For many dot matrix and inkjet printers no switch is required. As an example, if you have a Hewlett-Packard LaserJet Printer, the command you require in your "autoexec.bat" file is C:\WINDOWS\GRAPHICS LASERJET
If you do need to modify your "autoexec.bat" file in this way, be sure to shut down and then reboot your computer before attempting to print a graphics screen. If MOTA then prints graphics, all is well - if it does not, check the version number of DOS from which the two "graphics" files were obtained, it could be such as 6.10 or 6.21, and then re-enter the "SETVER C .... " command described previously - with the correct DOS source version number.

8. Further Information on the Pipe Step Factor.
The flow of air, air/fuel mix and exhaust gases through an engine is modelled mathematically by the engine simulator in MOTA. This "fluid flow" model requires a user supplied value, known as the "pipe step factor", for its operation.
It may be useful to provide some insight into the choice of value of the pipe step factor MOTA requires a minimum of four equi-spaced points along the shortest "passage section" in an engine to model the gas flow adequately. Suppose that the shortest length "passage section" in an engine is a transfer duct whose length is 48mm. For this engine a good choice of pipe step factor is 48mm divided by 4, that is 12mm. Generally this value will provide a good compromise between run time, accuracy and gas flow imbalances in the ducts (see sections 5, 5.1 and 6.16.9 in the Users Manual for MOTA).
When running the engine simulator, you will be prompted for the value of the pipe step factor and provided with recommended upper and lower limits for its value. These limits will be based on some of the dimensions you have already provided in the engine data file.

As an example, for the Yamaha KT100J engine, the limits for the pipe step factor provided by MOTA are 9 and 2. At most engine speeds the use of the value 9 results in an unacceptably high gas flow imbalance in the exhaust duct whilst a pipe step factor of 5 gives acceptable results. In making your choice of value, bear in mind that halving the value of the pipe step factor will increase the time for the simulator to complete it's run on your computer by a factor of four

      Remember ..... MOTA  Version 6.00 for Windows® is now available , should you wish to upgrade.
The cost is AUD$125 including post within Australia or exported to most countries.

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