question about weight and oversteer?
#31
Originally Posted by ZDan' date='Jan 7 2009, 03:55 PM
This is a different question, actively moving weight.
#32
Adding downforce is TOTALLY different from adding weight!
With downforce, you increase normal force while adding negligible mass. 100 lb. of rear downforce, with little to no additional mass at the rear will reduce oversteer/increase understeer. You've added lateral grip without adding very much at all to the mass that has to be laterally accelerated.
Adding 100 lb. of MASS at the rear is fundamentally different. You won't get enough additional rear grip (again because of the nonlinear nature of tire grip vs. normal force) to compensate for the additional mass. More oversteer.
With downforce, you increase normal force while adding negligible mass. 100 lb. of rear downforce, with little to no additional mass at the rear will reduce oversteer/increase understeer. You've added lateral grip without adding very much at all to the mass that has to be laterally accelerated.
Adding 100 lb. of MASS at the rear is fundamentally different. You won't get enough additional rear grip (again because of the nonlinear nature of tire grip vs. normal force) to compensate for the additional mass. More oversteer.
#33
Originally Posted by ZDan' date='Jan 7 2009, 04:24 PM
Adding downforce is TOTALLY different from adding weight!
With downforce, you increase normal force while adding negligible mass. 100 lb. of rear downforce, with little to no additional mass at the rear will reduce oversteer/increase understeer. You've added lateral grip without adding very much at all to the mass that has to be laterally accelerated.
Adding 100 lb. of MASS at the rear is fundamentally different. You won't get enough additional rear grip (again because of the nonlinear nature of tire grip vs. normal force) to compensate for the additional mass. More oversteer.
With downforce, you increase normal force while adding negligible mass. 100 lb. of rear downforce, with little to no additional mass at the rear will reduce oversteer/increase understeer. You've added lateral grip without adding very much at all to the mass that has to be laterally accelerated.
Adding 100 lb. of MASS at the rear is fundamentally different. You won't get enough additional rear grip (again because of the nonlinear nature of tire grip vs. normal force) to compensate for the additional mass. More oversteer.
#34
Originally Posted by krnmike' date='Jan 7 2009, 04:09 PM
it isn't a different question. it's about where you position the physical matter that was already on the kart.
The original question was regarding the oversteer/understeer behavior of a car with more static rear weight bias.
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