Cornering dynamics

[Ogami musashi]

Hello Folks,

I was wondering about how a car actually turned.
I know that the tire deforms and that speed differences within the contact path create a sideways net force but what i don't know are the dynamics of this.

Planes turn by applying lift perpendicular to the velocity path. To achieve that, depending on the speed we need to increase the angle of attack of the wings (thus the plane), known as local rotation which makes a little fraction of the turning force coming from the thrust being off the velocity path.

Fighter planes need to point their nose at the enemy so, sometime local rotation (the angle of attack) is very important.

I was wondering when a car turns what are the relation of the local angle (yaw angle) to the actual turning severity (the turning rate).

Also one question, why it is considered a car having a natural oversteer tendency be a better turner?

Thank you.

[bizadfar]

I"ll attempt the last question. Think about if you had understeer, you would be hesitating on the throttle to avoid running wide. Now if the car had a Catachable(very important) tendency on corner exit, its much faster and probably points much better.
Generally understeer on braking and oversteer (catchable) is the aim for most drivers.

[Carlos]

Ogami musashi - I spent perhaps 45 minutes writing commentary and organizing links, unfortunately even though my sign in included checking remember me box, all post was lost, short of time, I can only offer unorganized links. Have to go to work. Excuse the lack of details and long explaination of my own driving techniques has not been included.(sigh) Must get ready to work on roof before sun comes up; and heat rises, temperatures 90F/30C today here in Canada. Off for the day. Hope my links are helpful.
http://en.wikipedia.org/wiki/Vehicle_dynamics
http://www.mathworks.com/access/helpdes ... 20dynamics
http://www.mathworks.com/products/demos ... product=ID
http://www.turnfast.com/tech_handling/handling.shtml
http://www.auto-ware.com/setup/slp_hndl.htm
http://www.ozebiz.com.au/racetech/theory/align.html
http://en.wikipedia.org/wiki/Automotive ... ion_design
http://en.wikipedia.org/wiki/Car_handling
http://en.wikipedia.org/wiki/Weight_transfer
http://en.wikipedia.org/wiki/Oversteer
http://en.wikipedia.org/wiki/Understeer

[Ogami musashi]

many thanks to both of you, and i hope getting your driving style described carlos!

[zenvision]

many thanks to both of you, and i hope getting your driving style described carlos!

ever followed a drunk vomiting out of the window?

[Carlos]

Well yes...zenvision and I have both mastered the advanced driving technique of purging a night's beverage purchases out the side window... without getting any on the side panels

[Ogami musashi]

thank you for the links again, this is interesting and not so far from planes cornering.

[Belatti]

Well yes...zenvision and I have both mastered the advanced driving technique of purging a night's beverage purchases out the side window... without getting any on the side panels

How do you do that Carlos? Do you have a barge board in the side panel?