[Torcs-users] car1-ow1 in torcs-1.3.8-test1 ...

[Christoph G. <gr...@ma...>]

Hello List,

I downloaded version 1.3.8-test1, compiled it and tested it.
The behaviour of the open wheel car car1-ow1 has changed a lot.

Now it has horrible oversteer. It just flips sideways in full speed if I just
touch the steering wheel. 
So the car is going sideways through almost every corner - which is not very
realistic for F1.

I was able to find out that this is only due to the changes in the
car1-ow1.xml file.
If I copy the car1-ow1.xml from version 1.3.6, than everything is back to
normal - a stable car with decent downforce.

I tested some of the parameters and found out the following changes make the
car so very instable:

@@ -335,7 +335,7 @@
    </section>
    
    <section name="Front Axle">
-       <attnum name="xpos" unit="m" val="1.6"/>
+       <attnum name="xpos" unit="m" val="1.231"/>
        <attnum name="inertia" unit="kg.m2" val="0.0056"/>
        <attnum name="roll center height" unit="m" val="0.012"/>
        
@@ -346,7 +346,7 @@
    </section>
    
    <section name="Rear Axle">
-       <attnum name="xpos" unit="m" val="-1.35"/>
+       <attnum name="xpos" unit="m" val="-1.719"/>
        <attnum name="inertia" unit="kg.m2" val="0.0080"/>
        <attnum name="roll center height" unit="m" val="0.04"/>
 
I just changed these values to the old values and the car is working again.

So, why the changes? Are they done on purpose?

Greetings

-- 
Christoph Gröver, gr...@ma...