[Torcs-devel] Cars which may need updating

[Christos D. <dim...@id...>]

I think there are a couple of cars which might need some updating, but I
am not updating data that can cause havoc on the CVS before I'm pretty
sure they won't cause trouble with stuff... so

One of them is the porsche-gt1, which has a much higher max torque than
is warranted, though its power is more or less OK.. it is possible to
just fix that on CVS without breaking anything.

So I think I'll do that if there are no objections.

The mclaren-f1 has a slightly different problem.  Its Aero section is
such that you can never reach its reported max speed of 380km/h +
firstly because there is too much air resistance and secondly because in
the Aero section all the balance is shifted to the front, making the car
oversteer a lot unless you add some rear wing.   My solution to fixing
the max speed without breaking all the other cars is to

a) Change its aero section such that when there are no wings it reaches
the max speed and is still handles quite well:

b) Add a small Front Wing, which has a default adjustment such that the
total force is approximately the same as that with the old Aero section.
This seems to work well enough not to make a difference with the robots,
since these don't set the "Front Wing" to anything in this car.

These are the actual changed sections:

  <section name="Aerodynamics">
    <attnum name="Cx" min="0.20" max="2.0" val="0.32"/>
    <attnum name="front area" unit="m2" min="1.0" max="3.0" val="1.8"/>
    <attnum name="front Clift" val="0.675"/>
    <attnum name="rear Clift" val="0.825"/>
  </section>

  <section name="Front Wing">
    <attnum name="area" unit="m2" val="0.5"/>
    <attnum name="angle" unit="deg" min="0" max="30" val="4"/>
    <attnum name="xpos" unit="m" min="1.0" max="2.5" val="2.3"/>
    <attnum name="zpos" unit="m" min="0.0" max="0.2" val="0.00"/>
  </section>



-- 
Christos Dimitrakakis
Homepage: http://www.idiap.ch/~dimitrak/main.html
Music: http://olethros.dmusic.com