Originally Posted by
MrKipling
Grip is simply a measure of how much traction you have, not really a force in its own right.
Hence why we need to agree on how to use the word "grip" I didn't use the word grip as a force but to describe the time when a wheel is not slipping or sliding but still generating tractive forces.
Originally Posted by
MrKipling
Which is caused by flex in the sidewalls when the grip of the tyre exceeds the possible turning moment. It doesn't mean that the tyre is slipping across the surface of the tarmac.
Yes I know a slip angle is when the direction of travel and the apparent direction of the wheel differ however there can be slipping and sliding and without.
Originally Posted by
MrKipling
I guess you're refering to the 'snappiness' of F1 cars i.e. their tendancy to spin at the point they break traction? That's because of the set up trade-off between the width of the line between smokey tyres and a crash, and ultimate cornering speed. The narrower the line, the higher the cornering speed - F1 cars have no need to move around so, through very stiff suspension and so-on, that line can be atom-thin. The reliance on aerodynamic grip also has a huge impact: if the car is not moving straight into its direction of travel, none of the wings will be working and you'll lose enormous amounts of grip in a split second - spin-a-rama.
Yes like I said the tires are designed so that they are in grip mode right up to the limit of traction.
Originally Posted by
MrKipling
That depends on the type of power delivery the engine provides relative to the grip level of the tyres (torque vs power for example), weight distribution, driveshaft wind-up, tyre type, weather conditions etc etc. If you try that chirping technique in a 911, you stand a good chance of wasting tenths to axle tramp.
By chirping I meant that the wheels where rotating faster than the velocity of the vehicle. To get the most traction out of any tire you need to go beyond grip mode (even in F1 but there it is such a fine line that you shouldn't try)
Originally Posted by
MrKipling
On road tyres, yes.
On all tires... Even in F1 the limit of traction is just ever so slightly beyond the grip mode limit of the tire.
Originally Posted by
MrKipling
Depends on the tyre, the car and the purpose, if by 'maximum traction' you mean 'going as fast as you can go'
By "Maximum traction" I mean maximum traction... traction being the ability of the tire to restrain lateral acceleration and produce straight line acceleration and deceleration. You make the most when the tires are slipping ever so slightly and on some tires smoke is produced.
Originally Posted by
MrKipling
Rally cars don't really oversteer though, you only ever see the back trying to overtake the front during hairpins. The trick to rally driving is balancing the throttle that's taking you forward via the four wheels against the what has always been known (long before D1) as a four-wheel drift, to create an arc from entry to apex to exit. In rallying all four wheels are moving across the surface towards the outside of the corner - oversteer is when only the back of the car has those tendencies.
In any sharp corner in a rally, every car that makes it through will have been in oversteer at some point during the corner. By the way, when the centerline of the car and the line of travel are not the same and when the cars centerline is pointed so that the front is closer to the inside then the back then the car is in oversteer.
Power, whether measured as HP, PS, or KW is what accelerates cars and gets it up to top speed. Power also determines how far you take a wall when you hit it
Engine torque is an illusion.