# How do I calculate my ride frequency?

## How do I calculate my ride frequency?

f = Natural frequency (Hz) K = Spring rate (N/m) M = Mass (kg)

1. 0.5-1.0Hz Passenger cars, typical OEM.
2. 1.0-1.5Hz Typical lowering springs.
3. 1.5-2.0Hz Rally Cars.
4. 1.5-2.5Hz Non-Aero racecars, moderate downforce Formula cars.
5. 2.5-3.5Hz Moderate downforce racecars with up to 50% total weight in max downforce capability.

## How is Fsae roll rate calculated?

Required Dimensions:

1. Front Track Width (tf) = 1.5m.
2. Rear Track Width (tr) = 1.5m.
3. Wheel Base (L) = 2.9m.
4. Centre of Gravity Height (h) = 0.457m.
5. Centre of Gravity to Roll Axis Height (H) = 0.335m.

What is natural frequency in suspension?

One of the most basic aspects of a suspension setup is natural frequency. If you recall from physics, if you tie a mass to a spring in a perfect environment (no friction, air resistance, dampening, etc.) it will oscillate at a certain frequency. This frequency is known as the “natural frequency”.

What is ride frequency?

A ride frequency is the undamped natural frequency of the body in ride. The higher the frequency, the stiffer the ride. So, this parameter can be viewed as normalized ride stiffness. In Figure 1, we can see the undamped vertical motion of the chassis with the front ride frequency higher than the rear.

### How do you calculate roll stiffness?

By taking out 100 lb/in of spring rate from the left front we lowered the roll stiffness and moved the spring center to the right. Now you can calculate roll stiffness using Equation 3. In our example s/2 = 48/2 = 24 inch and X = 2.67 so (s/2+X) = 26.67 inch and (s/2 – X) = 21.33 inch.

### How do you calculate roll rate?

They may calculate roll rates by the number of borrowers in delinquency or the amount of funds delinquent. For example, if 20 out of 100 credit card users who were delinquent after 60 days are still delinquent after 90 days, the 60-to-90 days roll-rate is 20%.

What is a good wheel rate?

Most passenger cars have ride frequencies between 1.2 and 1.6 Hz with sportier cars around 1.8 – 2 Hz. F1 cars are > 3 Hz, but this would not be recommended for any car that drives on anything other than smooth race tracks.