hardingfv32 wrote:
I need a clear understanding of what is happening with the Total individual wheel loads when related to this discussion. I use the word Total to avoid any discussion of what loads might be considered part of the Total. Just trying to keep this part simple.
In my test example, ALL thinks are exactly the same during a braking test. For one brake test the mercury system is functional, the system's slave cylinders moving, and in a second brake test, the system in not functional (but still in place), the system's slave cylinders DO NOT move. It is my CLAIM that the loads measured at a wheel, in the same location/corner, will be the same value in both tests.
Point by point-
You brought up the idea of total wheel loads in your controlled braking example. I expanded on that and conceded that yes- total loads are a function of mass and acceleration but INDIVIDUAL wheel loads (not "total" individual wheel loads) are a function of the dymanics of the car with respect to the suspension system and contact patch.
To further expand on this, lets say braking loads in your example peak at 1.6G (arbitrary number). If all 4 wheels are in contact with the ground, each wheel will contribute some variable portion to that 1.6G - but the sum of all 4 wheels contributiuon will equal 1.6G. Now -if you can still generate 1.6g while braking and you only have 3 wheels in contact with the ground, that 1.6G is divided by 3, not 4, so individual loads can change despite total loads staying the same.
Note that the 3 wheeled example was given only to show that you can have the same total loads but differing individual loads. That "proportionality" of loads changes for a whole host of reasons including tire temps, suspension geometry effects on tire contact patch, damping, change in attitude of the car- and many other factors. This is the difference I believe exists and thought you did too... now I'm not so sure.
hardingfv32 wrote:
Agree or disagree? IF you disagree what is the cause of your proposed difference in wheel loads in these highly controlled tests? Remember, all things are equal except the functionality of the mercury system during these tests.
Brian
Disagree- see above explanation but to expand on that. If you concede that the mercury system would change the attitude of the car by reducing dive- then the proportional loads on any individual corner can also change for a whole host of reasons as stated above.