faster through corners

[truegearhead]

As an instructor I’m gonna disagree with the understeer approach. The most effective way to slow your car is with the brakes and 0 or minimal tire slippage. Understeering will compromise your braking and your turn in (kinetic vs, static friction) and will very quickly overheat your tires which will further compromise braking and effect handling.


Here's a helpful way to think about drip. The amount of grip is represented the outside of the circle (the adhesion limit). You can use this grip for accelerating, turning or braking. If you are turning and braking, or turning and accelerating the amount of grip you have will be split between these two functions. For a turn at the end of the straight away you want to start with all your grip being invested into the braking (which means your wheels will be as straight as possible), if your wheel is turned at all you'll be using some grip for turning. As you enter the turn you'll start to lift off the brake and turn in, your tires will still be at the adhesion limit but you'll slowly give more and more grip to turning and less to braking (this is called trail braking). As you accelerate out its the exact opposite, you'll invest more and more drip to accelerating and less to turning as you open up the wheel out of the corner. If your tires slides at all this adhesion limit (or circle) becomes smaller and smaller and you have less grip to use for braking, accelerating and turning.

[BrantyB]

Originally Posted by truegearhead

As an instructor I’m gonna disagree with the understeer approach. The most effective way to slow your car is with the brakes and 0 or minimal tire slippage. Understeering will compromise your braking and your turn in (kinetic vs, static friction) and will very quickly overheat your tires which will further compromise braking and effect handling.

I could not agree more.

[Topless]

Hmmm, my ears were burning and after reading this thread I think some ideas may have been twisted around a bit. I don't know where the original reference to driving technique is but I'll attempt to illustrate my method of "faster through the corners".

Cars always accelerate faster in a straight line. They also stop better in a straight line. The fastest way around a track is taking the corners out of the corners as much as possible because whenever the tires are side loaded, you are scrubbing speed and going slower.

Type 1: The most common 90*ish turn benefits from a late apex where you brake in a straight line, perform a quick turn-in so you can immediately go to the gas as you unwind the wheel. Under ideal conditions you will be at full throttle and unwound at the apex effectively lengthening the straightaway under acceleration. The longer you are on the gas in a straight line, the faster you go around the track.

Type 2: On some corners like a 180* or a banked 160* a type 1 turn is the safe play but a double apex is faster. On a right hand banked 160* I prefer to approach on the far left, turn in early with no braking yet, run a straight line to the top of the bank braking very late and rotating the car quickly in a controlled slide. Once it is pointing to my exit I unwind the wheel as I roll on the gas, being full throttle at the 2nd apex. This cannot work in every corner and it carries more risk if you get it wrong, but it can be very effective because it lengthens the straight both on entry and exit, minimizing side loading the tires, and maximizing time on the throttle in a straight line. Practice this one where there are no walls or obstructions to hit if you get it wrong.

This guy demonstrates both techniques here while keeping the car absolutely at the limit of grip in every corner:
https://www.youtube.com/watch?v=fLCpHnA54cQ

[jaykay]

I believe that originally the discussion may have been around consideration of the steering wheel as a brake mechanism and throttle pedal as a steering mechanism.....please correct me if I am wrong.

Wheels turned = slower pace
Modulate throttle to adjust lines rather than saw at the wheel

.....not that I can do it