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

[Bernhard W. <be...@bl...>]

Hi Christoph

I am not sure if the car was properly parameterized in test1. But to 
adopt it to the new tire temperature model I did quite some 
test-driving, here you can see a part of it, see:

https://youtu.be/Ou4Q2Ygzm8A

After the tires got warmed up it was a pretty pleasant ride, even with 
the horrible imprecise game pad.

Kind regards

Bernhard

On 05.01.2018 13:02, Christoph Gröver wrote:
 >
 > 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
 >