Re: [Speed-dreams-devel] Trac ticket #100: Rework 36GP for Simuv2.1

[Speed D. <no...@so...>]

#100: Rework 36GP for Simuv2.1
----------------------------+-----------------------------------------------
 Reporter:  kakuri          |       Owner:  kakukri     
     Type:  defect          |      Status:  accepted    
 Priority:  major           |   Milestone:  2.0.0       
Component:  Cars            |     Version:  1.4.0 beta 1
 Keywords:  36GP downforce  |  
----------------------------+-----------------------------------------------

Old description:

> I woiuld expect those cars to have almost 0. One can catch it from the
> cockpit by applying a constant amount of brake at high speeds, and if the
> amount is chosen well the tyres do not lock right after pressing the
> brakes, but they lock later as speed and downforce decrease. Which is
> physically correct, just unexpected in these cars. Looking at the xml
> files it turns out that their Clift values are roughly the same as LS1's,
> and roughly the half of supercars' clift (sidenote for 2.0: I guess LS1
> and supercar should have roughly the same value, LS1 having a bit more),
> and almost twice as much as GP1600. I think realistically they should
> have somewhat less than GP1600, so around 0.1-0.15.

New description:

 I would expect those cars to have almost 0. One can catch it from the
 cockpit by applying a constant amount of brake at high speeds, and if the
 amount is chosen well the tires do not lock right after pressing the
 brakes, but they lock later as speed and down-force decrease. Which is
 physically correct, just unexpected in these cars. Looking at the xml
 files it turns out that their Clift values are roughly the same as LS1's,
 and roughly the half of supercars' clift (side note for 2.0: I guess LS1s
 and Supercars should have roughly the same value, LS1 having a bit more),
 and almost twice as much as GP1600. I think realistically they should have
 somewhat less than GP1600, so around 0.1-0.15.

--

Comment(by pouillot):

 Here's my (modest driver) feedback after spending 2 or 3 hours drive-
 testing these "old clunkers" on Brondehach (Steering Wheel + Pedal, Pro
 mode, ABS On, TCS Off) :
  * Autounion : Very unstable on throttle, quite strong brakes,
  * Silber : weaker brakes, easier to master,
  * Tridenti 6c34 : rear very unstable on brakes,
  * Tridenti V8Ri : on the contrary ; too much grip ? (strong brakes)
  * Milano 12c36 : Very powerful (as Autounion), but very well balanced
 behavior / brakes
  * Milano Typo P3 : Less powerful, but also well balanced. But way too
 much brakes ?
  * Ettore T59 : slow in turns, seems it never turns ... under-steery at
 low speeds
  * Century : as expected, a bit slow ; same unstable rear on brakes as
 Tridenti 6c34
 The whole set seems quite well balanced as far as lap times are concerned
 (surprisingly).

 As far as realism is concerned, IIRC, we had stated that we were targeting
 at the same time realistic behavior _and_ realistic parameters in the XML
 files ; that is avoid unrealistic tweaking of these parameters to get
 realistic behavior ... and probably using the skill level in order to make
 the car better drivable (through more grip).
 Are these setups on this line ?
 Just for my knowledge, no criticism here :-)

-- 
Ticket URL: <http://sourceforge.net/apps/trac/speed-dreams/ticket/100#comment:16>
Speed Dreams <http://sourceforge.net/projects/speed-dreams>
An Open Motorsport Simulator forked from Torcs in order to deliver a better user experience through nicer and more consistent car sets, visually improved tracks and enhanced physics realism.