Percentage Anti Lift Solution

STEP 0: Pre-Calculation Summary
Formula Used
Percentage Anti Lift = (Percentage Front Braking)*(Side View Swing Arm Height/Side View Swing Arm Length)/(Height of CG above Road/Wheelbase of Vehicle)
%ALr = (%Bf)*(SVSAh/SVSAl)/(h/b)
This formula uses 6 Variables
Variables Used
Percentage Anti Lift - Percentage Anti Lift describes the amount the rear of the vehicle lifts under braking.
Percentage Front Braking - Percentage Front Braking is the amount of braking distributed to the front brakes.
Side View Swing Arm Height - (Measured in Meter) - Side View Swing Arm Height is the height of the Instantaneous center of swing arm as seen from side view.
Side View Swing Arm Length - (Measured in Meter) - Side View Swing Arm Length is the horizontal distance between center point of tyre and instantaneous center of swing arm in the side view.
Height of CG above Road - (Measured in Meter) - Height of CG above Road is defined as the height of vehicle's centre of gravity above road surface.
Wheelbase of Vehicle - (Measured in Meter) - Wheelbase of Vehicle is the center distance between the front and the rear axle of the vehicle.
STEP 1: Convert Input(s) to Base Unit
Percentage Front Braking: 60 --> No Conversion Required
Side View Swing Arm Height: 200 Millimeter --> 0.2 Meter (Check conversion here)
Side View Swing Arm Length: 600 Millimeter --> 0.6 Meter (Check conversion here)
Height of CG above Road: 10000 Millimeter --> 10 Meter (Check conversion here)
Wheelbase of Vehicle: 1350 Millimeter --> 1.35 Meter (Check conversion here)
STEP 2: Evaluate Formula
Substituting Input Values in Formula
%ALr = (%Bf)*(SVSAh/SVSAl)/(h/b) --> (60)*(0.2/0.6)/(10/1.35)
Evaluating ... ...
%ALr = 2.7
STEP 3: Convert Result to Output's Unit
2.7 --> No Conversion Required
FINAL ANSWER
2.7 <-- Percentage Anti Lift
(Calculation completed in 00.019 seconds)

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13 Anti Geometry of Independent Suspension Calculators

Wheelbase of Vehicle from Percentage Anti Dive
Go Wheelbase of Vehicle = Percentage Anti Dive Front/((Percentage Front Braking)*(Side View Swing Arm Height/Side View Swing Arm Length)/(Height of CG above Road))
Height of Centre of Gravity from Road Surface from Percentage Anti Dive
Go Height of CG above Road = ((Percentage Front Braking)*(Side View Swing Arm Height/Side View Swing Arm Length)*Wheelbase of Vehicle)/Percentage Anti Dive Front
Percentage Front Braking given Percentage Anti Dive
Go Percentage Front Braking = Percentage Anti Dive Front/((Side View Swing Arm Height/Side View Swing Arm Length)/(Height of CG above Road/Wheelbase of Vehicle))
Percentage Anti Dive on Front
Go Percentage Anti Dive Front = (Percentage Front Braking)*(Side View Swing Arm Height/Side View Swing Arm Length)/(Height of CG above Road/Wheelbase of Vehicle)
Wheelbase of Vehicle from Percentage Anti Lift
Go Wheelbase of Vehicle = Percentage Anti Lift/((Percentage Front Braking)*(Side View Swing Arm Height/Side View Swing Arm Length)/(Height of CG above Road))
Percentage Anti Lift
Go Percentage Anti Lift = (Percentage Front Braking)*(Side View Swing Arm Height/Side View Swing Arm Length)/(Height of CG above Road/Wheelbase of Vehicle)
Height of Centre of Gravity from Road Surface from Percentage Anti Lift
Go Height of CG above Road = ((Percentage Rear Braking)*(Side View Swing Arm Height/Side View Swing Arm Length)*Wheelbase of Vehicle)/Percentage Anti Lift
Percentage Rear Braking given Percentage Anti Lift
Go Percentage Rear Braking = Percentage Anti Lift/((Side View Swing Arm Height/Side View Swing Arm Length)/(Height of CG above Road/Wheelbase of Vehicle))
Percent Anti Squat
Go %Anti Squat = (tan(Angle between IC and Ground)/(Height of CG above Road/Wheelbase of Vehicle))*100
Angle between IC and Ground
Go Angle between IC and Ground = atan(Side View Swing Arm Height/Side View Swing Arm Length)
Front View Swing Arm
Go Front View Swing Arm = (Track Width of Vehicle/2)/(1-Roll Camber)
Camber Change Rate
Go Camber Change Rate = atan(1/Front View Swing Arm)
Roll Camber
Go Roll Camber = Camber Angle/Roll Angle

Percentage Anti Lift Formula

Percentage Anti Lift = (Percentage Front Braking)*(Side View Swing Arm Height/Side View Swing Arm Length)/(Height of CG above Road/Wheelbase of Vehicle)
%ALr = (%Bf)*(SVSAh/SVSAl)/(h/b)

What are the benefits of anti geometry?

Anti-geometries are being used on aero cars. This is because the angle of the underbody was very carefully designed to produce maximum downforce at the set angle. Therefore any changes in the height of the floor pan front to rear would disrupt downforce and therefore massively reduce the grip of the car. With 100% anti-geometry installed it meant that on throttle or brakes the bottom of the car would not pivot and therefore maximum aerodynamic grip was available from the car. Another reason is due to the fact that most race cars have a very low ride height and have an increased chance of bottoming out on circuit. If a car bottoms out on circuit then the suspension suddenly becomes void, the car is slowed down by the increased friction and damage can occur to the underside of the car and any underbody aero. With some anti geometry installed it provides a limiting factor to how much the car can physically dive or squat in accelerating or braking conditions making it very difficult for the car to bottom out.

What are the negatives of anti geometry?

The main drawback to anti-geometry is driver feedback. When a driver applies the brakes in a car they expect the front of the car to dip down. The more severe the dip, the harder they are on the brakes. When they apply the throttle they would also expect the back of the car to sit down slightly. The more the back sits down, the harder they are accelerating. Anti-geometry removes this sensation and provides the driver will very little dynamic feedback under these conditions leaving them feeling only the G forces from their actions. This can be difficult to drive and also difficult to anticipate reaching the limits of grip during braking and acceleration causing an unsettled car. Therefore it is often best to design some squat and some dive back into the suspension system and not run 100% anti-geometry unless the aero dynamics dictate so.

How to Calculate Percentage Anti Lift?

Percentage Anti Lift calculator uses Percentage Anti Lift = (Percentage Front Braking)*(Side View Swing Arm Height/Side View Swing Arm Length)/(Height of CG above Road/Wheelbase of Vehicle) to calculate the Percentage Anti Lift, The Percentage anti lift formula is defined as the ratio between the height of where the tire force vector crosses the center of gravity plane expressed as a percentage. Percentage Anti Lift is denoted by %ALr symbol.

How to calculate Percentage Anti Lift using this online calculator? To use this online calculator for Percentage Anti Lift, enter Percentage Front Braking (%Bf), Side View Swing Arm Height (SVSAh), Side View Swing Arm Length (SVSAl), Height of CG above Road (h) & Wheelbase of Vehicle (b) and hit the calculate button. Here is how the Percentage Anti Lift calculation can be explained with given input values -> 2.7 = (60)*(0.2/0.6)/(10/1.35).

FAQ

What is Percentage Anti Lift?
The Percentage anti lift formula is defined as the ratio between the height of where the tire force vector crosses the center of gravity plane expressed as a percentage and is represented as %ALr = (%Bf)*(SVSAh/SVSAl)/(h/b) or Percentage Anti Lift = (Percentage Front Braking)*(Side View Swing Arm Height/Side View Swing Arm Length)/(Height of CG above Road/Wheelbase of Vehicle). Percentage Front Braking is the amount of braking distributed to the front brakes, Side View Swing Arm Height is the height of the Instantaneous center of swing arm as seen from side view, Side View Swing Arm Length is the horizontal distance between center point of tyre and instantaneous center of swing arm in the side view, Height of CG above Road is defined as the height of vehicle's centre of gravity above road surface & Wheelbase of Vehicle is the center distance between the front and the rear axle of the vehicle.
How to calculate Percentage Anti Lift?
The Percentage anti lift formula is defined as the ratio between the height of where the tire force vector crosses the center of gravity plane expressed as a percentage is calculated using Percentage Anti Lift = (Percentage Front Braking)*(Side View Swing Arm Height/Side View Swing Arm Length)/(Height of CG above Road/Wheelbase of Vehicle). To calculate Percentage Anti Lift, you need Percentage Front Braking (%Bf), Side View Swing Arm Height (SVSAh), Side View Swing Arm Length (SVSAl), Height of CG above Road (h) & Wheelbase of Vehicle (b). With our tool, you need to enter the respective value for Percentage Front Braking, Side View Swing Arm Height, Side View Swing Arm Length, Height of CG above Road & Wheelbase of Vehicle and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
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