4 ms·

As someone who knows nothing about cars, what surprised me was just how much of this was braking right after you accelerate, which in hindsight is obvious given

As someone who knows nothing about cars, what surprised me was just how much of this was braking right after you accelerate, which in hindsight is obvious given the turns at crazy speeds, but still.

kirse 8y ago
A good eye. One of the biggest lessons taught in any advanced car control course is that the brakes/gas aren't just for stopping/going. By using them to modulate weight transfer you can change grip levels at F/R, adjust vehicle yaw (+/- turning radius), smooth out suspension undulations, etc.
- perl4ever 8y ago
  I would have assumed that it was primarily just because of the principle that to go as fast as possible, you need to be using 100% of your grip at all times either accelerating, braking, or turning. https://en.wikipedia.org/wiki/Circle_of_forces https://en.wikipedia.org/wiki/Circle_of_forces I've sometimes thought that it would be a neat addition to a performance car's instrumentation to have a gauge that showed where you were in the traction circle.
  - taneq 8y ago
    > I've sometimes thought that it would be a neat addition to a performance car's instrumentation to have a gauge that showed where you were in the traction circle. Didn't the Nissan Skyline GTR have this?
    - jsjohnst 8y ago
      Are you maybe thinking of the front torque gauge? Thats the only gauge I can think of on the classic Skyline GTR that isn’t common on most cars, but that’s still not a traction circle like GP referenced.
      - taneq 8y ago
        I was actually thinking of the Top Gear review of the R34 Skyline, which shows a 2-axis G-meter (so basically the same thing). Not sure if this was ever standard equipment, though, since I can't find reference to it elsewhere. Source: https://youtu.be/oAp1CXnAqGs?t=50s https://youtu.be/oAp1CXnAqGs?t=50s
- cjpb 8y ago
  Also remember these cars are built with KERS/DRS: "During braking, a generator at the front axle converts the car’s kinetic energy into electrical energy. In the split exhaust system, one turbine drives the turbocharger while another converts surplus energy into electrical energy. The braking energy contributes 60 per cent, with the remaining 40 per cent coming from exhaust gas. The recuperated electrical energy is stored temporarily in a lithium-ion battery and feeds an electric motor on demand. “On demand” means: the driver wants to accelerate and calls up the energy at the press of a button. In accordance with the latest regulation changes, the power from the combustion engine is just under 368 kW (500 HP), and the output from the electric motor is well over 294 kW (400 HP)."

As someone who knows nothing about cars, what surprised me was just how much of this was braking right after you accelerate, which in hindsight is obvious given the turns at crazy speeds, but still.

kirse 8y ago

A good eye. One of the biggest lessons taught in any advanced car control course is that the brakes/gas aren't just for stopping/going. By using them to modulate weight transfer you can change grip levels at F/R, adjust vehicle yaw (+/- turning radius), smooth out suspension undulations, etc.

perl4ever 8y ago
I would have assumed that it was primarily just because of the principle that to go as fast as possible, you need to be using 100% of your grip at all times either accelerating, braking, or turning. https://en.wikipedia.org/wiki/Circle_of_forces https://en.wikipedia.org/wiki/Circle_of_forces I've sometimes thought that it would be a neat addition to a performance car's instrumentation to have a gauge that showed where you were in the traction circle.
- taneq 8y ago
  > I've sometimes thought that it would be a neat addition to a performance car's instrumentation to have a gauge that showed where you were in the traction circle. Didn't the Nissan Skyline GTR have this?
  - jsjohnst 8y ago
    Are you maybe thinking of the front torque gauge? Thats the only gauge I can think of on the classic Skyline GTR that isn’t common on most cars, but that’s still not a traction circle like GP referenced.
    - taneq 8y ago
      I was actually thinking of the Top Gear review of the R34 Skyline, which shows a 2-axis G-meter (so basically the same thing). Not sure if this was ever standard equipment, though, since I can't find reference to it elsewhere. Source: https://youtu.be/oAp1CXnAqGs?t=50s https://youtu.be/oAp1CXnAqGs?t=50s
cjpb 8y ago
Also remember these cars are built with KERS/DRS: "During braking, a generator at the front axle converts the car’s kinetic energy into electrical energy. In the split exhaust system, one turbine drives the turbocharger while another converts surplus energy into electrical energy. The braking energy contributes 60 per cent, with the remaining 40 per cent coming from exhaust gas. The recuperated electrical energy is stored temporarily in a lithium-ion battery and feeds an electric motor on demand. “On demand” means: the driver wants to accelerate and calls up the energy at the press of a button. In accordance with the latest regulation changes, the power from the combustion engine is just under 368 kW (500 HP), and the output from the electric motor is well over 294 kW (400 HP)."