Cars RSS GT1 Championship

[garyjpaterson]

And some tasty stats to whet your appetite.

 

[Trezoitao38]

Lots of torque. It will be very pleasurable to drive.

 

[mclarenf1papa]

I seem to recall the L/D and downforce numbers in the UI (...and the power figures) being absolute nonsense in GTR2....

 

[CC]

I seem to recall the L/D and downforce numbers in the UI (...and the power figures) being absolute nonsense in GTR2....

I dont do physics , but compared 2 power graphs and torque against the real thing and was shocked how accurate they was , wasnt 100% but almost

 

[garyjpaterson]

I seem to recall the L/D and downforce numbers in the UI (...and the power figures) being absolute nonsense in GTR2....

Whats that downforce figure supposed to be anyway? Is there a unit attached to it, and if so at what speeds might you achieve it?

 

[AccAkut]

Whats that downforce figure supposed to be anyway? Is there a unit attached to it, and if so at what speeds might you achieve it?

that looks like that weird "aero points" unit I came across while doing the 996. Jürgen Alzen wrote me that "front aero was noted at 300 points, rear at 500 points" (or thereabout, I don't have the email at hand). He could not tell me any real force or weight number, so we settle on just using the ratio and compareable downforce values of other 996 race variants.

You best bet is probably chucking it into a CFD tool. For this car its important to get it right.

 

[garyjpaterson]

that looks like that weird "aero points" unit I came across while doing the 996. Jürgen Alzen wrote me that "front aero was noted at 300 points, rear at 500 points" (or thereabout, I don't have the email at hand). He could not tell me any real force or weight number, so we settle on just using the ratio and compareable downforce values of other 996 race variants.

You best bet is probably chucking it into a CFD tool. For this car its important to get it right.

Well 'points' is quite commonly used in motorsport for aero, and I think different people have different definitions of what 1 point is.

I think (I may well be wrong) that 1 point is usually equated to 0.01CL, so is just a really easy way to quantify how much an aero upgrade or element is 'worth', for example "This new wing is worth 10 points, but we are still 50 points behind our main rival".

But if that number is in aero points, that would be a CL of 42... which is obviously not the case. Maybe their 'points' are worth 0.001CL, in which case it might donate 4.2CL which is certainly achievable in some cars, but still quite optimistic to say the least for this.

 

[DriftApprentice]

".....
Downforce=0.5*(air density)*(speed)^2*(reference area)*Cl

Usually you don't work with Cl, but with [reference area*Cl], namely SCl.
SCl has the dimension of surface, i.e. m^2 in SI; typical values are between 2 and 5.

1 point corresponds to SCl=0.01m^2:
if your car improves from SCl=4 to SCl=4.30 it has gained 30 points of downforce.

Working with points is easier because you work with numbers like 5, 7, 30 instead of 0.05, 0.07, 0.30.

If in the formula for downforce you substitute air density=1.22 kg/m^3 and take into account dividing by 3.6^2 (conversion for speed from m/s to kph) and by 9.81 (conversion from N to kg) you get

Downforce=0.0048*(speed in kph)^2*SCl

and finally with 1 point corresponding to SCl=0.01m^2

1 point [kg] = 0.000048*(speed [kph])^2..."

I don't know if this is true or not, but it seems plausible

Source:http://www.f1technical.net/forum/viewtopic.php?t=8250

 

[A3DR]

Doing some surface work on the Viper with matching cameras. Not a single flat panel on this car. Fun

 

[garyjpaterson]

Can't wait for the Viper, progress will no doubt be swift! Bets on how long it takes to overtake mine?!

 

[A3DR]

Can't wait for the Viper, progress will no doubt be swift! Bets on how long it takes to overtake mine?!

LOL maybe not, as I'm finishing my house (it's been under construction for the past 6 months now) and it's taking more of my time than I'd like to doing some work myself, dealing with workers, etc...

But I'll try

 

[Michael Springer]

Doing some surface work on the Viper with matching cameras. Not a single flat panel on this car. Fun

View attachment 211511

OH MY GOD

It begins!

 

[eboo]

LOL maybe not, as I'm finishing my house (it's been under construction for the past 6 months now) and it's taking more of my time than I'd like to doing some work myself, dealing with workers, etc...

But I'll try

its not race;p nice start !

 

[garyjpaterson]

its not race;p nice start !

When you have to spend 8 hours a day in an office plus a 40min commute each way where you can't model anything - it becomes a race!

 

[aphidgod]

Don't race Dan. I tried that with the Mustang, him on the model vs. me on the physics. I kept up, but it was basically by working full-time and on the weekends.

 

[CC]

Don't race Dan. I tried that with the Mustang, him on the model vs. me on the physics. I kept up, but it was basically by working full-time and on the weekends.

No one can work as fast as old one handed Dan

 

[garyjpaterson]

Question:

Louvres

Or more Louvres?

 

[Eugene Abramoff]

Just drop the hood altogether

 

[CC]

Question:

Louvres

Or more Louvres?

Lets compare 1st online , but these cars was hand built , by chimpanzees ,
if one day they had sex they would make 16 vents , with no sex they would make only 8

 

[garyjpaterson]

... I don't even know what to say