mender thanks for the great post, its great to hear someone with a lot of experience confirm what's being said here.
Good thought about the Saleen too, if the bias isn't dialed it, there is nothing the driver can do.
So are you saying that the lateral tire curve is about the same shape as...
I think the latter hypothesis is the one that everyone has been referring to throughout the thread. I hope anyways because you are correct, the first one means nothing.
Its true that there probably wasn't much difference between the Saleen and Lambo due to this effect, but this effect is still...
jimgram what we have been saying here that it is not a linear relationship, and that simple formula doesn't hold up.
Think of the extreme case of a car braking so hard the rear wheels are just about leaving the ground. The front wheels do not have twice the grip to make up the difference...
Broadly sweeping generalization in engineering discussions assume other variables constant.
Well its very important as different compounds take different about of time to heat up to the temperature where they have the coefficient of friction to lock the wheels. The time that takes to heat up...
Yeah Stingray I agree with you. I may be overstating the nonlinearity, but I wanted to bring it up because I wanted future readers (like myself) to know that tire characteristics are more complex than the simple physics equations that were being used in the thread.
In reality you're right...
Also, about your graph, choose the highest grip tire for lighter car and it will brake the best. You seem to be trying to change two variables at once and I'm not sure why.
I'm really not understanding why you think its an unfair comparison. High coefficient of friction tires are not reserved for heavy cars! Any car can use a hard or soft (grippy) tire. In order to compare the effect of mass on braking, you have to use the same tires. You can ONLY compare...
Untrue. The name of the thread is "Shorter distances for ultralight vehicles?"
The answer is yes. And everything I've talked about is applicable to understanding why the answer is "yes."
You are leaving out a very important factor, the frictional coefficient of the brake pads to the...
I think it would do a lot better to look at the tire characteristic curves in the link. Keep in mind that these are for lateral grip, not longitundinal grip, however I think the basic characteristics are the same. The idea is that what you gain with mass to additional force on the tires cannot...
I will answer some of the other questions by Mech Engr and mheslep soon, but in the mean time you both need to open the wonderful link posted by mender. It explains many of the things I was trying to say, but better than I could explain them. The summary points are:
"*Peak grip exists when...
What you said though makes me realize that the additional load transfer probably attributes more to the decrease in braking than the nonlinearity tire characteristics. The tires probably behave near the linear region in the longitudinal direction, the nonlinearity shows up much more in the...
Yes absolutely it has an advantage to be lighter. The advantage from the additional weight on the tires is less than the disadvantage from slowing the additional mass.
There is no difference between inside and outside the design parameters, the performance is still governered by the same laws...
I stumbled across this thread when trying to learn more about braking. There have been some good things written here, but there has been a lot of total crap as well. Many posters know only enough to be dangerous. The purpose of me creating an account and a post is more for those in the future...