| 1 (X): Left Front Anti-Lift or Left Rear Anti-Squat |
% |
The resistance to lifting in a front suspension or resistance to squatting in
a rear suspension due to suspension geometry during acceleration. In a suspension
with 100% anti-lift/squat the moment about the side view instant center due to
weight transfer is exactly offset by the moment about the side view instant center
due to the acceleration force. See the following equations:
- Front Suspensions Live Axles
- acx = -(front drive ratio)/2
- dtwt = slr*abs(2*acx)/(diff
ratio)/track
- aczleft = -(cg height)/2/(wheel base) -
dtwt
- aczright= -(cg height)/2/(wheel base) +
dtwt
- Orientation A:
- dzfleft =
acx*(C(3,1)-slr*C(3,5))+acx*(C(3,7)-slr*C(3,11))
- dzfright =
acx*(C(9,1)-slr*C(9,5))+acx*(C(9,7)-slr*C(9,11))
- Orientation B:
- dzfleft =
acx*(-C(3,1)+slr*C(3,5))+acx*(-C(3,7)+slr*C(3,11))
- dzfright =
acx*(-C(9,1)+slr*C(9,5))+acx*(-C(9,7)+slr*C(9,11))
- dzwleft = aczleft*C(3,3) +
aczright*C(3,9)
- dzwright = aczleft*C(9,3) +
aczright*C(9,9)
- left anti-lift =
-100*dzfleft/dzwleft
- right anti-lift =
-100*dzfleft/dzwleft
- Front Suspensions Fixed Differentials
- acx = -(front drive ratio)/2
- aczleft = -(cg height)/2/(wheel
base)
- aczright= -(cg height)/2/(wheel
base)
- Orientation A:
- dzfleft = acx*C(3,1)+acx*C(3,7)
- dzfright = acx*C(9,1)+acx*C(9,7)
- Orientation B:
- dzfleft = -acx*C(3,1)-acx*C(3,7)
- dzfright = -acx*C(9,1)-acx*C(9,7)
- dzwleft = aczleft*C(3,3) +
aczright*C(3,9)
- dzwright = aczleft*C(9,3) +
aczright*C(9,9)
- left anti-lift =
-100*dzfleft/dzwleft
- right anti-lift =
-100*dzfleft/dzwleft
- Rear Suspensions Live Axles
- acx = -(1 - front drive ratio)/2
- dtwt = slr*abs(2*acx)/(diff
ratio)/track
- aczleft = (cg height)/2/(wheel base) -
dtwt
- aczright= (cg height)/2/(wheel base) +
dtwt
- Orientation A:
- dzfleft =
acx*(C(3,1)-slr*C(3,5))+acx*(C(3,7)-slr*C(3,11))
- dzfright =
acx*(C(9,1)-slr*C(9,5))+acx*(C(9,7)-slr*C(9,11))
- Orientation B:
- dzfleft =
acx*(-C(3,1)+slr*C(3,5))+acx*(-C(3,7)+slr*C(3,11))
- dzfright =
acx*(-C(9,1)+slr*C(9,5))+acx*(-C(9,7)+slr*C(9,11))
- dzwleft = aczleft*C(3,3) +
aczright*C(3,9)
- dzwright = aczleft*C(9,3) +
aczright*C(9,9)
- left anti-lift =
-100*dzfleft/dzwleft
- right anti-lift =
-100*dzfleft/dzwleft
- Rear Suspensions Fixed Differentials
- acx = -(1 - front drive ratio)/2
- aczleft = (cg height)/2/(wheel
base)
- aczright = (cg height)/2/(wheel
base)
- Orientation A:
- dzfleft = acx*C(3,1)+acx*C(3,7)
- dzfright = acx*C(9,1)+acx*C(9,7)
- Orientation B:
- dzfleft = -acx*C(3,1)-acx*C(3,7)
- dzfright = -acx*C(9,1)-acx*C(9,7)
- dzwleft = aczleft*C(3,3) +
aczright*C(3,9)
- dzwright = aczleft*C(9,3) +
aczright*C(9,9)
- left anti-lift =
-100*dzfleft/dzwleft
- right anti-lift =
-100*dzfleft/dzwleft
|
| 2 (Y): Right Front Anti-Lift or Right Rear Anti-Squat |
% |
See Component 1 (above) for explanation and equations. |
| 3 (Z): Average Front Anti-Lift or Rear Anti-Squat |
% |
The mean of components 1 and 2. |
|
4 (RX): Left Front Lift or
Left Rear Squat
|
mm/g |
The front suspension lift or rear suspension squat during acceleration or:
- Front Suspensions
- left lift = -(dzfleft+dzwleft+aczleft/(tire
stiffness))*weight
- Rear Suspensions
- left squat = (dzfleft+dzwleft+aczleft/(tire
stiffness))*weight
|
| 5 (RY): Right Front Lift or Right Rear Squat
|
mm/g |
The front suspension lift or rear suspension squat during acceleration or:
- Front Suspensions
- right lift = -(dzfright+dzwright+aczright/(tire
stiffness))*weight
- Rear Suspensions
- right squat = (dzfright+dzwright+aczright/(tire
stiffness))*weight
|
| 6 (RZ): Average Front Lift or Rear Squat |
mm/g |
The mean of components 4 and 5 |