F1 is using brake by wire
Doesn’t the new Honda NSX have brake by wire
Not really No, but it does kinda depend what you mean by ‘brake-by-wire’
The traditional definition is; no mechanical connection between the input and output. All communication of driver intent is done electrically. Most Engineers imagine a system where the pedal is simply a sensor and an electric motor in the caliper decodes the sensor and applies mechanical force.
Both Formula 1 and the Honda NSX use a very similar system to current road cars. The calipers are hydraulically actuated by a hydraulic master cylinder which sits very close to the brake pedal.
The new bit is that under ‘normal’ operation the brake pedal doesn’t move any brake fluid. The pedal pushes on a big spring (so the driver gets the right pedal feel) and a sensor measures pedal travel and pedal effort and turns on the ABS pump which provides hydraulic pressure to the brake calipers and slows the car down.
However when the electrics fail a normally-closed solenoid valve will default to normally-open and the brake pedal will be re-connected to the hydraulic circuit and the driver will be back to pushing the hydraulic fluid and generating the hydraulic pressure.
So we’re closer but not actually anywhere near to proper brake-by-wire 8)