Unrestricted Performance

[jdlive]

I'm cumming at the thought of seeing that Red Bull X2010 do Eau Rouge at 350 kph

How about a X2011?
http://www.youtube.com/watch?v=e7ySBD-x ... re=related

Nice! Now in real life as well please

[Scootin159]

Even when you say "unrestricted" there's some outside enviroment variables that need to be considered, such as race length (gotta figure how many stops you want and how durable a tire you need); is there refueling (is fuel weight a major or minor concern)? type of track (% throttle usage/lap)? etc.

If the engine could only drive the wheels, you would probably see something like a 5L v12 turbo making close to 3000hp driving the rear wheels through a CVT, combined with an AWD KERS system. The exact limits on both would be defined by the tradeoff between more power and extra fuel/battery weight - which is again defined by average speed and % throttle of the track.

If you didn't have a limit on wheel-driving-motors, I could easily envision aircraft jet engines being utilized to supplement a wheel driving motor.

Aero would no doubt have active wings moving with controls for yaw, roll and downforce. The car would basically have aircraft controls at this point, with aero surfaces not only controlling downforce but being used to turn the car as well. Cornering forces would be limited by both tire life and the human body of the driver.

Other aero features would be a full ground effect floor with sliding skirts and active trim flaps, as well as enclosed wheels for reduced drag. The cockpit would no doubt be enclosed.

There would be a dizzying array of electronic aids. All of the obvious ones like traction control and ABS would be there, but you'd also have new ones like a computer to control the aero surfaces.

[Cold Fussion]

First of all, you cover the wheels and gain an extra 10% aero pewrformance.

Then all in one go, V10 Screamers, develop the hell out of them and youll posibly get 1500hp out of them, add a KERS/HERS/VERS/SERS system that can add an extra 500hp as well. Active Suspension, Reactive Ride Height, Fluidic Aero, adaptive aero and all that jazz. Thats probably an improvement of arround 40-50%.

Then you get the survival cell enclosed, increasing performance by 10% more.

Then its all down to stopping, brakes, wheels and tyres. Probably get another 15% out of the car then.

Look at the Red Bull X2010 in Gran Turismo, thats what it would probably look like.

The problem is that you would probably do Spa in about 1 min 10 to 1 min 20 range, Eau Rouge would be taken at a flat 350kmh on the first run. The top of Kemmel would be arround 444kmh+, whitch is 300mph for those using metric. Drivers would have to use G Suits not Nomex racing suits as Eau Rouge would be pulling close to 7.5 negitive Gs then simmilar in the other direction.

Monza would be a track that would be done in arround 40 seconds by my estimate.

An F1 car at present would do Le Mans in arround 3:45, LMP1 cars are doing it in 3:25.

The G-forces in a formula 1 car are primarily lateral and not vertical like in a fighter jet (though eau rouge will have a decent amount of vertical), so a g-suit wouldn't be of much use. It's also worth noting that the red bull air race pilots don't wear g-suits when they fly, and they pull up to 12g.

[bhallg2k]

I don't know that a driver would necessarily want to wear a g-suit, either. Its inflation could hamper his ability to precisely apply the throttle and brakes.

[Belatti]

Although this is a ridiculous idea, it can be a good excersice to think about the limits.
I think that any mistake driving the supposed "car" would be a fatal accident.

Maybe the entire car could be designed and manufactured, but the tyres rise a big question to me.I would like to know what JT has to say regarding a tyre that would have little cooling and would have to bear enormous normal, tractive and lateral loads...

[Belatti]

Here a little experiment:

I made a modification to the rFactor 2011 RB7 physical model. 1200HP at 15000rpm, lower drag, high "diffuser or tunnel based" downforce, 550Kg.
I cut down coefficients based on ESPIs assumptions of 10% here and there.

Without KERS/HERS or active aero or suspension, the top speed is 430Kmh and Gs reach to almost 10. After 6 laps of changing setups to avoid the bottom scratching the ground, I clocked 1m19s.





There you can see the data generated with the Motec plugin, at Les Fagnes. Dont be too harsh, I was driving with the keyboard
I havent got a steering wheel.

Now, regarding the questions I had for JT or any other tyre guy out there, look at this:





The tyres would have to cope with peaks of 2 Tons each, and more than 4 Tons of downforce at very high rotational speeds.

One of the things I immediately noticed was the tyre temps: look how they heat in the sides:





There I was using the "standard" rFactor pressure of 19 psi. All the load is being taken by the tyre shoulders. When I increased the pressure to arround 25psi the effect was reduced, but the car was jumping all the way arround.