Tesla Cybertruck for Assetto Corsa (Nurburgring Test)

[VR Driving]

Sponsored

 

[JBee]

EV motors are linear in relative compared to ICE or Turbo cars.

All 3 of those curves are nearly identical, just more power throughout.

I would say the driving feeling now is 90-95% to the real truck, while we have not driven the truck yet, we have driven other cars that we made, so we have a great understanding of how the car would feel in real. The variable steering is a breakthrough for us as well. We thought it would be more difficult to tune, but after initial test drives it feels amazing. Driving around tight parking lots and go-kart tracks is very enjoyable!

Now we just need to finish the visual.

That's great to hear that you have done the SbW simulation as well. That will be most interesting to try, as it definitely looks like it's different.

I'm not sure if you are reading the torque graph correctly, all three drop off considerably at around 70kmh, which is the point that torque is not in fact linear at all. By 120kmh your at half according to the graph above. We obviously don't have a dyno for the CT yet, but it won't be that much different.

I'm not trying to be argumentative, just highlighting a flaw in that premise as these will drastically change your performance modelling from what is real, in a noticable manner in simulation, because it's well within the normal driving speeds.

On the CT I'd expect this to start around 50-60kmh because of the lower gearing and higher gearbox ratios, which are required for towing and off-roading.

What motor RPM are you using? If you take the tyre circumference and a 12:1 ratio you get around 1260 wheel RPM and 15,000 motor RPM. Some induction going up to 16-18k RPM, so that's fairly close.

The front motor is however a PM, and is very likely to have a different and longer ratio than the induction at the rear. This is so they hit the right spot for efficiency on the heat map under cruise load.

With this setup at around 5000RPM you will start hitting the torque reduction, so I'd say it would have to be modelled to take this into consideration otherwise it will be quite different to the real truck dynamics.

 

[JBee]

That looks great!

Do you have a pre-release demo available on AC? I'm happy to give you feedback if you want. My son also does esport/rally driving competitively and would be interested to try it out as well.

 

[WHIZZARD OF OZ]

We have just solved the 4-wheel steering and variable steering simulation. So yes, it will be a 1:1 simulation!

Here is a preview video using a placeholder Concept version model. The accurate production version is still in the works. We have since improved low-speed maneuverability after filming this video.

Brake lights need tuning.....
'Oh, Stop It'

 

[VR Driving]

That's great to hear that you have done the SbW simulation as well. That will be most interesting to try, as it definitely looks like it's different.

I'm not sure if you are reading the torque graph correctly, all three drop off considerably at around 70kmh, which is the point that torque is not in fact linear at all. By 120kmh your at half according to the graph above. We obviously don't have a dyno for the CT yet, but it won't be that much different.

I'm not trying to be argumentative, just highlighting a flaw in that premise as these will drastically change your performance modelling from what is real, in a noticable manner in simulation, because it's well within the normal driving speeds.

On the CT I'd expect this to start around 50-60kmh because of the lower gearing and higher gearbox ratios, which are required for towing and off-roading.

What motor RPM are you using? If you take the tyre circumference and a 12:1 ratio you get around 1260 wheel RPM and 15,000 motor RPM. Some induction going up to 16-18k RPM, so that's fairly close.

The front motor is however a PM, and is very likely to have a different and longer ratio than the induction at the rear. This is so they hit the right spot for efficiency on the heat map under cruise load.

With this setup at around 5000RPM you will start hitting the torque reduction, so I'd say it would have to be modelled to take this into consideration otherwise it will be quite different to the real truck dynamics.

You are correct in the RPM range, while we don't know the exact power delivery, we do know its top speed, 1/4 mile time, dimensions/weight and drag efficiency. with some reverse calculations, using the final gear at a 12:1 ratio and motor set at 15.5k-16k RPM would get results matching Tesla's claims.

 

[VR Driving]

 

[JBee]

I was just thinking that it would be really cool to actually drive the CT on AC, but in the CT and on it's screen, using the actual CT steering wheel and pedals as a force feedback controllers.

People could do "demo" test drives in the CT while sitting in the show room.

 

[VR Driving]

I was just thinking that it would be really cool to actually drive the CT on AC, but in the CT and on it's screen, using the actual CT steering wheel and pedals as a force feedback controllers.

People could do "demo" test drives in the CT while sitting in the show room.

Yes, we have thought of that and it is not too difficult to do in a Tesla. In fact we can run Assetto Corsa directly via the MCU if it has Steam. I'm very interested to see if we can take the FFB unit from the Cybertruck and use it directly on a PC. The way the FFB is programmed on the Cybertruck could be very interesting and useful for sim racing in general.

We have already driven the work-in-progress virtual Cybertruck over 1000km digitally. Putting it through parking lot maps, karting tracks, autocross, mountain passes, and hundreds of different tracks including the Nurburgring. It is insane how great this truck drives!

 

[VR Driving]

 

[VR Driving]

What motor RPM are you using? If you take the tyre circumference and a 12:1 ratio you get around 1260 wheel RPM and 15,000 motor RPM. Some induction going up to 16-18k RPM, so that's fairly close.

The front motor is however a PM, and is very likely to have a different and longer ratio than the induction at the rear. This is so they hit the right spot for efficiency on the heat map under cruise load.

With this setup at around 5000RPM you will start hitting the torque reduction, so I'd say it would have to be modelled to take this into consideration otherwise it will be quite different to the real truck dynamics.

In a recent interview from Munro Live, a Tesla executive confirmed the 15:1 ratio. At 19000RPM it allows the Tri-Motor to reach the exact 209km/h top speed and also the exact 11 seconds 1/4 mile time.

 

[Gurule92]

This was probably already brought up. But do you guys not have to worry about Tesla getting mad for using their IP?

 

[JBee]

This was probably already brought up. But do you guys not have to worry about Tesla getting mad for using their IP?

Within reason:

https://www.tesla.com/en_au/blog/all-our-patent-are-belong-you

 

[Gurule92]

Within reason:

https://www.tesla.com/en_au/blog/all-our-patent-are-belong-you

forgot about that. thanks!

Carry on then lol

 

[LexusCyber]

We have just solved the 4-wheel steering and variable steering simulation. So yes, it will be a 1:1 simulation!

Here is a preview video using a placeholder Concept version model. The accurate production version is still in the works. We have since improved low-speed maneuverability after filming this video.

interesting ! can you post the link here... this could be a great way to play with the CT experience. thank you

 

[VR Driving]

interesting ! can you post the link here... this could be a great way to play with the CT experience. thank you

You can check out our progress from our Patreon. https://www.patreon.com/vrdriving

Hopefully, we will be able to finish this soon!

Sponsored