Curb to Curb Diameter and Ackerman 1 and 2
Request Number: 80000290
.plt Files  .abf, .mrf Files  Component  Unit  Comment 

F1  RESULT(1)  Not Used  Not Used  Not Used 
F2  RESULT(2)  Curb to Curb Diameter (Method 1)  m  The first method of calculating the approximate diameter of the circle the
vehicle would move around at the current steer angles assuming no rear wheel steer.

F3  RESULT(3)  Percent Ackerman (Method 1)  %  The first method of calculating percent Ackerman. Ackerman is used to
quantify the amount of scrubbing occurring on the front of the vehicle during a
turn assuming no rear wheel steer. A vehicle whose front wheels are parallel (the
same steer angle) has 0% Ackerman. Conversely a vehicle is said to be 100%
Ackerman when the lines through the left and right spindle axes intersect in the
top view at a lateral line passing through the rear wheel centers. The following
equation is used to calculate percent Ackerman with Method 1. See F2/RESULT(2)
above for intermediate term calculations.

F4  RESULT(4)  Ackerman Deviation (Method 1)  deg  The first method of calculating Ackerman deviation. Ackerman deviation, like
percent Ackerman, is used to quantify the amount of scrubbing occurring on the
front of the vehicle during a turn assuming no rear wheel steer. Zero Ackerman
deviation means that lines through the left and right spindle axes intersect in
the top view at a lateral line passing through the rear wheel centers. The
following equation is used to calculate Ackerman deviation with Method 1. See
F2/RESULT(2) above for intermediate term calculations. alpha = atan((wheel base)/((turn radius)+track/2)) deviation = (outeralpha)*rtod 
F5  RESULT(5)  Not Used  Not Used  Not Used 
F6  RESULT(6)  Curb to Curb Diameter (Method 2)  m  The second method of calculating the approximate diameter of the circle the
vehicle would move around at the current steer angles assuming no rear wheel steer.

F7  RESULT(7)  Percent Ackerman (Method 2)  % 
The second method of calculating percent Ackerman. See F3/RESULT(3) above for an explanation of Percent Ackerman. See F6/RESULT(6) above for intermediate term calculations. alpha = atan((wheel base)/((turn radius)+track/2)) percent Ackerman = (innerouter)/(inneralpha)*100 
F8  RESULT(8)  Ackerman Deviation (Method 2)  deg  The second method of calculating Ackerman deviation. See F4/RESULT(4) above
for an explanation of Ackerman deviation. See F6/RESULT(6) and F7/RESULT(7) above
for intermediate term calculations. deviation = (outeralpha)*rtod 