Oversteer! Wasn't expecting that!
03-16-2007, 04:06 PM
#21
Le Mans Master
Originally Posted by DavidFarmer
Should have paid attention in Trig class. I use this stuff everyday.
Sin/Cos conversion aren't linear, so you can only scale the above
numbers within a small range. You would be better to actually
calculate based on real number.
Sin (angle) = opposite/hypotenuse(toe/diameter)
or Angle = Arcsin(toe/diameter)
Remember, you usually measure Total Toe. You need to cut that in
half before converting to Wheel Angle.
**One last thing. Make sure your calculator is in "degree" mode.
If it only does Radian, then 2pie Radians=360deg
Sin/Cos conversion aren't linear, so you can only scale the above
numbers within a small range. You would be better to actually
calculate based on real number.
Sin (angle) = opposite/hypotenuse(toe/diameter)
or Angle = Arcsin(toe/diameter)
Remember, you usually measure Total Toe. You need to cut that in
half before converting to Wheel Angle.
**One last thing. Make sure your calculator is in "degree" mode.
If it only does Radian, then 2pie Radians=360deg
then:
Assuming a 26" diameter tire (a GdYear GS-D3 is 25.7" tall),
Toe per side ....... Degrees per side
1/32" (0.03125") = 0.0689º [or 0.1377º Total]
1/16" (0.0625") = 0.1377º [or 0.2755º Total]
3/32" (0.0938") = 0.2066º [or 0.4131º Total]
1/8 " (0.1250") = 0.2754º [or 0.5509º Total]
Edit: correct typo - (0.3125") should be (0.03125")
.
Last edited by Slalom4me; 04-07-2007 at 02:49 PM.
