Which wheel loses traction first?

  • Thread starter Thread starter aortucre
  • Start date Start date
  • Tags Tags
    Traction Wheel
AI Thread Summary
When driving a rear-wheel-drive car too fast around a corner, the inner wheels can lose down-force due to mass transfer, potentially leading to oversteer. The discussion highlights the importance of understanding how weight distribution affects traction, particularly with a limited slip differential like a Torsen LSD. To prevent the rear inner wheel from slipping, the design of a dynamic spoiler is proposed to increase downforce on that wheel. Calculating the necessary downforce involves considering the total weight on the wheel and the gyroscopic effects during turns. Understanding these dynamics is crucial for optimizing performance and preventing loss of traction.
aortucre
Messages
14
Reaction score
0
When you drive a real wheel drive too fast around a corner, the two inner wheels lose some down-force due to mass transfer. If you oversteer, does the rear inner wheel lose traction first? And then trigger the oversteer?

If so, are there any equations to determine how the weight is distributed knowing the total mass of the car, the distance between wheels, the height of the CG, etc...?

Thank you in advance for any help!
 
Engineering news on Phys.org
hello and welcome..loss of traction depends on if it is an open or limited slip differential. I recommend you look at a post in Automotive Engineering section called Race Car Suspension Class..
 
Hello and thanks for your fast answer.

The car we are using has a limited slip differential. More specifically a Torsen LSD.

I will read that post and come back as soon as I can.

What we are trying to do is a "2 wing dynaimc spoiler" that will raise its left or right half to provide the needed downforce to the rear inner wheel so that it won't slip. What we are trying to figure out is how much of the total weight is being put on that wheel, and how much does it need so that it doesn't slip. The difference will be provided by the spoiler.

Thanks again
 
Any tips or ideas? Thanks guys!
 
In general to determine distribution of forces when a car takes a turn, you must consider gyroscopic effect equations. That shows how a moment is created to lift the inner wheels while taking a turn.
 
How did you find PF?: Via Google search Hi, I have a vessel I 3D printed to investigate single bubble rise. The vessel has a 4 mm gap separated by acrylic panels. This is essentially my viewing chamber where I can record the bubble motion. The vessel is open to atmosphere. The bubble generation mechanism is composed of a syringe pump and glass capillary tube (Internal Diameter of 0.45 mm). I connect a 1/4” air line hose from the syringe to the capillary The bubble is formed at the tip...
Thread 'Physics of Stretch: What pressure does a band apply on a cylinder?'
Scenario 1 (figure 1) A continuous loop of elastic material is stretched around two metal bars. The top bar is attached to a load cell that reads force. The lower bar can be moved downwards to stretch the elastic material. The lower bar is moved downwards until the two bars are 1190mm apart, stretching the elastic material. The bars are 5mm thick, so the total internal loop length is 1200mm (1190mm + 5mm + 5mm). At this level of stretch, the load cell reads 45N tensile force. Key numbers...
I'd like to create a thread with links to 3-D Printer resources, including printers and software package suggestions. My motivations are selfish, as I have a 3-D printed project that I'm working on, and I'd like to buy a simple printer and use low cost software to make the first prototype. There are some previous threads about 3-D printing like this: https://www.physicsforums.com/threads/are-3d-printers-easy-to-use-yet.917489/ but none that address the overall topic (unless I've missed...

Similar threads

Replies
9
Views
8K
Replies
4
Views
5K
Replies
5
Views
3K
Replies
4
Views
5K
Replies
6
Views
8K
Replies
22
Views
4K
Replies
7
Views
2K
Back
Top