Roll Over

1. ## Roll Over

Do you guys have a forumula where you just put in the numbers to find out at what point will your car flip over while turning?

2. lol, not that easy, depends on coefficient of friction between tires and the street surface, your speed etc...

3. Don't most cars slide? I really don't know, I'm just basing that on the fact that our tall & narrow VW camper van slides but doesn't come close to tipping.

Edit:
And suspension and location of center of mass...

4. if you want it to roll you have to raise the center of gravity.

5. For it to roll, the center of gravity needs to get on the other side of the point of contact and that's going to depend on a whole lot of variables that have been mentioned above.

Try this:

6. Lol, wtf. Is that Chemistry? Looks earily familiar (in terms of difficulty to understand) to my Probability notes

7. Excuse my curiosity, but why do you need to know this? There are too many variables like coeficient of friction, weight, center of gravity, road camber etc...

8. I have no idea what it is, other than a google search for math formula.

You may be right that it's some chemistry because dilution is there. Maybe NHg is some kind of recognised label for a chemical compound.

Best answers are found using emperical data...Can we borrow you're car?

9. Okay let me see if I can google it.

10. Unless you're a PhD in physics, most people use the "Oh Shit!" formula. That is the probability of rollover is directly proportional to the volume of the "Oh Shit!" from the occupants of the car when entering a turn. Also popular is using evidence of defacation on the surface of the seating units, but this can only be done as a forensic measurement after the event.

11. There is almost ZERO possibility of flipping an automobile by actions of the driver alone, even rapid left-right turns will simply result in tire slippage.

But a lot of trucks and especially the useless SUV's can be tipped by an agressive driver in dry conditions.

12. If you use inertia+sticky tires + positive camber corner you can roll anything. I almost rolled my echo, if it was RWD it woudl have drifted.

13. oh sure, just go find a steep parking lot then

14. Originally Posted by coolio
Do you guys have a forumula where you just put in the numbers to find out at what point will your car flip over while turning?
Is this a question for school or something that you want to do?

I derived the following formula:

v^2/r = g (d2/d1)

v - velocity of car
r - turning radius of car (draw a circle of the curve and use this radius)
g - gravity (9.8 m/s2)
d2 - 1/2 distance between the tires
d1 - distance to the centre of gravity from the ground

The left side of the equation can be modified, while the right side of the equation is fixed (i.e. a function of the car).

I don't believe friction is a factor since it is only necessary to allow the sharp turn to occur. It does not affect the tipping point.

I'm such a nerd.

15. I''m just curious to calculating it. Merging back on the highway with those circular roundabouts got me curious about it. It's okay if it is not really accurate. I thought it would be cool to know.

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