Revvd
Oversteer Expert
- Messages
- 1,320
I only recently found this downforce measurement on Dewesoft's website (the company which verified all kinds of data for Rimac's record breaking runs). Apparently they mounted some sensors to the car's dampers and were able to calculate downforce this way.
Let's use this number to try and estimate the rest of the aero modes on Rimac Nevera:
High Speed mode (DRS)
For speeds beyond the normal 350 kph limiter, the car is set up in special DRS aero mode. This means the front top flap is open, diffuser flap is open, rear wing is not totally retracted and has very little angle of attack.
Dewesoft recorded total downforce of 550 kg at top speed (412 kph). That's about 203 kg at 250 kph.
Track mode
Assuming the aero balance is 45% front / 55% rear (LaFerrari low drag stats), we get 91 kg just on the front axle.
Assuming Track mode with the rear wing all the way up and with aggressive angle of attack, has aero balance of 25% front / 75% rear (close to LaFerrari's high downforce stats) and the front axle downforce stays the same, this gives us total downforce of 364 kg at 250 kph.
Reminder that Pininfarina Battista with Furiosa aero package generated 260 kg at 250 kph in high downforce mode, in their own wind tunnel.
Range mode
Rimac says the difference from Range mode to Track mode is 326%. This gives us 112 kg at 250 kph for the Range mode.
LaFerrari claims 141 kg at the same speed.
I used LaFerrari as a reference, because it's a fairly modern car with a lot of active aero devices.
At the front, it has a center underbody guide vane and two flaps channeling air in the wheel well area.
And at the back, it has two diffuser flaps and the active spoiler.
While there's warranted skepticism about Ferrari's downforce claims, I'm hoping they wouldn't lie about their downforce split numbers. This whole estimation hinges on that
.
But of course, don't take these too seriously. I'm just having fun with it.
Let's use this number to try and estimate the rest of the aero modes on Rimac Nevera:
High Speed mode (DRS)
For speeds beyond the normal 350 kph limiter, the car is set up in special DRS aero mode. This means the front top flap is open, diffuser flap is open, rear wing is not totally retracted and has very little angle of attack.
Dewesoft recorded total downforce of 550 kg at top speed (412 kph). That's about 203 kg at 250 kph.
Track mode
Assuming the aero balance is 45% front / 55% rear (LaFerrari low drag stats), we get 91 kg just on the front axle.
Assuming Track mode with the rear wing all the way up and with aggressive angle of attack, has aero balance of 25% front / 75% rear (close to LaFerrari's high downforce stats) and the front axle downforce stays the same, this gives us total downforce of 364 kg at 250 kph.
Reminder that Pininfarina Battista with Furiosa aero package generated 260 kg at 250 kph in high downforce mode, in their own wind tunnel.
Range mode
Rimac says the difference from Range mode to Track mode is 326%. This gives us 112 kg at 250 kph for the Range mode.
LaFerrari claims 141 kg at the same speed.
I used LaFerrari as a reference, because it's a fairly modern car with a lot of active aero devices.
At the front, it has a center underbody guide vane and two flaps channeling air in the wheel well area.
And at the back, it has two diffuser flaps and the active spoiler.
While there's warranted skepticism about Ferrari's downforce claims, I'm hoping they wouldn't lie about their downforce split numbers. This whole estimation hinges on that
.But of course, don't take these too seriously. I'm just having fun with it.
