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Strange car behaviour #257

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Pawks666 opened this issue Sep 27, 2015 · 10 comments
Closed

Strange car behaviour #257

Pawks666 opened this issue Sep 27, 2015 · 10 comments
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@Pawks666
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I experienced a problem on skidpad 3, circuit track.
Sometimes car just becomes uncontrollable...on times it goes reverse in forward gears, other times it just wanders off even flying through the air, engine revs very high with none gas applied - strange stuff in general.
I haven't been able to figure out a pattern which triggers this, but I think that this only happens when tarmac tires are used in setup. At least i didn't notice this happening with gravel tires.

@lucatabaton
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I experienced the same. It looks like tires suddenly loose any kind of grip and/or friction. Infact if I brake it stops at least revving. It's strange as starting the stage for few corners it's normally working fine.

@paskalip
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Had the same issue in skidpad when I crashed in the invisible barrier that blocks the entrance to disabled areas. The car went into reverse no matter the gear and kept accelerating.

@ghiboz
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ghiboz commented Sep 28, 2015

where is the point that happens this?

@ghiboz ghiboz added the Bug Houston, we have a problem label Sep 28, 2015
@ghiboz ghiboz added this to the Physics milestone Sep 28, 2015
@IronFly74
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i can replicate it on skipad using keyboard, without touching any wall.

just accelerate until you can engage the 4th gear, around 100km/h, keep it steered to the center of skipad, lift the throttle just to manage a little the understeer, accelerate again.
the car will start to slide without any control and it will start to accelerate on its own.

you can even put to neutral and the car will still run back and forward, if you pull the handbrake, you will notice that the front wheels are running like the car was a TA or 4WD.
check replay:
https://drive.google.com/file/d/0By4gMxBMR6uiTU5PYlpnOHgzZFE/view?usp=sharing

@Pawks666
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another example: https://drive.google.com/file/d/0Bw53RWSU8dfYOHVhdkxza3pvTUU/view?usp=sharing
starts at around 2:20 onwards.

@ghiboz
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ghiboz commented Sep 30, 2015

please try with the tyre window (F1) open and check if this strange behaviour happens when the pressure/temperature comes to a high value

@IronFly74
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The issue arises when tyre pressure goes over 1.99 bar, at 2.00 the car start to slide and front wheels start to have traction as was 4WD.
i managed to stop completly the car, no gear, brakes and handbrake on and noticed that temperature dropped very slowly (@0.01 rate) but pressure never went under 1.99.

temp

@szdeak
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szdeak commented Sep 30, 2015

Looking at the values in the picture, I have a feeling that the 134 bar pressure (and 10789 degrees) of the front right signals the issue better than "going over 2 bar" :D

@IronFly74
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ahhaha yep that was the worst case, but you will face the car slide just passing the 2.00 bar pressure.

@IronFly74
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yes, i confirm, it's pressure related.
on setup screen, put 2,20 as pressure and enjoy the crazy 131
only on tarmac tyres!!!!

@ghiboz ghiboz self-assigned this Oct 1, 2015
@ghiboz ghiboz closed this as completed Oct 26, 2015
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