Carbon FIber 2008-2020 Nissan R35 GTR CBA DBA EBA TS ST2 Style GT Wing For R35 GTR

Detailed drawing:   

A very large 'rear wing' (rear spoiler) was once installed at the rear of many sports cars.

Many of you may wonder how significant it is on public roads, as you can only drive at speeds of approximately 100 to 120 kilometers per hour. Is the tail wing really effective?

When a car is traveling at high speed, the speed difference between the air flowing on the upper surface of the body and the air flowing on the lower surface of the body will apply a force called lift, causing the car to lift.

The force increases proportionally with the increase of speed, and the steering wheel becomes lighter when driving at high speeds. Even slight crosswind can easily be swept left and right, which has a negative impact on the behavior of the car.

Especially tall SUVs and small trucks often receive a large amount of air under the floor, and have great lifting power and are easy to work.

In a racing world with an average speed of more than 200km, such as an F1 car, the huge rear wing deliberately generates air resistance to generate downforce (the force that fixes the body on the ground and suppresses lift), and by equipping it with wider tires, it gains ground Contact force and improves turning speed.

Within this speed range, the influence of the tail wing is enormous, and the tail wing is the second most important factor after racing tires.

On the other hand, a designer from a domestic car manufacturer who turned to the stability department stated: "In the case of standard passenger cars, in order to reduce the impact of air speed, the goal is usually to achieve 'zero lift' (without applying lift to the body).

However, if the downforce is too strong like a racing car, the maneuverability will be very stable, but it will create resistance to driving, resulting in an extreme decrease in fuel efficiency.

Among passenger cars, we give top priority to reducing air resistance to improve fuel efficiency. We focus on how to balance downforce to improve handling stability, "Honda said that it has a big tail like a racing car. Even the Civic R (FK8) also aims at" zero lift ".

As an example of a commercial sports car, we will be a bit technical, but let's take a closer look at the numbers.

The Lift coefficient (CL value) of the first generation NSX of Honda's Supercar is 0.055 in the front and 0.02 in the rear.

We will omit detailed calculation methods, but when driving at a speed of 60 km/h, a lift of 2.8 kg is generated at the front and 1.0 kg at the rear.

If this is 120 kilometers per hour, it will increase to 11 kilograms at the front and 4.1 kilograms at the rear.

The first generation NSX weighs 1350 kilograms, with a front and rear weight distribution of 42:58, resulting in a front wheel load of 567 kilograms and a rear wheel load of 783 kilograms.

When applying lift to the front and rear wheel loads based on vehicle speed, the degree of impact on steering stability is 0.1~0.5% at 60km/h and 0.5~1.9% at 120km/h.

It is only a few percent, but according to the above designer, even this small difference in driving at the extreme speed is enough to pursue aerodynamic performance in the racing competition for a few seconds.