[MVRC] Mantium Virtual Racecar Challenge 2020 (Grand Prix Cars)

[jjn9128]

Hi, the front wheels are ready, rear wheels will be ready in 24h.

I was wondering if we are going to change the wheelbase.

In 2022 wheelbase will not be free in F1 but limited to 3600mm (2021 F1 cars have a wheelbase of about 3700mm-3750mm and 2020 MVRC cars used a wheelbase of 3500mm).

LVDH said a few pages back Xr is at 3600mm.

Wheelbase will still be still free, just up to 3600mm

[CAEdevice]

LVDH said a few pages back Xr is at 3600mm.

Thanks, I had missed it

Wheelbase will still be still free, just up to 3600mm

I guess no one will use less than 3600

[LegendaryM]

Wouldn't be better to use a 1mm round (or bigger) instead of the 2mm segment?

It should be easy to check and would avoid cuspide shape.

If a 1mm round is applied to trailing edge which tapers to a point, then you lose control of where the trailing edge is. This is especially true with a 3d wing where the round will eat up more or less of the wing depending on how small the angle is between the pressure and suction surface. A round could be applied to the 1mm/2mm thick trailing edge after it has been defined, but I don't think this is done, the aero gains would be minimal and it would cause manufacturing headaches.

[CAEdevice]

Hi this is the preview of the new wheels.



The volume of the wheel intersects the ground (only 1mm) in order to avoid small (unwanted) channels.
The deformation is more or less realistic (I used the average downforce of my car, that is less then the three top teams but more than any other car).
The rimms are quite simple but enough for the realism of the simulations.

I have these questions:

1) Which could be a good guess for the brakes diameter?

2) Should the brake ducts/inlets remain the same as 2021?

3) Suspensions points of connection to the car will change, but I am not sure about what to expect from the rules (may I will provide a different "setup" if LDVH needs it)

4) I can model that small wings above the front wheels, does someone has some documentation about them?

5) I can add rims covers, also in this case documentaion would be useful

6) I propose "fatter" and neutral section for the suspensions arms, in order to have the best possibile integration with different cars design of the front wing.

[jjn9128]

1) Which could be a good guess for the brakes diameter?

11.3 Brake discs and pads
11.3.1 No more than one brake disc is permitted on each wheel which must have the same rotational velocity as the wheel it is connected to.
11.3.2 All discs must have a maximum thickness of 32mm
11.3.3 The diameters of the discs are between 325mm and 330mm for the front and between 275mm and 280mm for the rear.

[wb92]

4) I can model that small wings above the front wheels, does someone has some documentation about them?

5) I can add rims covers, also in this case documentaion would be useful

For points 4) and 5) there's no available documentation, at least for public. I would suggest to rely on what was presented on FIA official concept in Austin with certain approximations which is heavily outdated, but better than nothing.

[CAEdevice]

1) Which could be a good guess for the brakes diameter?

11.3 Brake discs and pads
11.3.1 No more than one brake disc is permitted on each wheel which must have the same rotational velocity as the wheel it is connected to.
11.3.2 All discs must have a maximum thickness of 32mm
11.3.3 The diameters of the discs are between 325mm and 330mm for the front and between 275mm and 280mm for the rear.

Ok, thanks

[CAEdevice]

4) I can model that small wings above the front wheels, does someone has some documentation about them?

5) I can add rims covers, also in this case documentaion would be useful

For points 4) and 5) there's no available documentation, at least for public. I would suggest to rely on what was presented on FIA official concept in Austin with certain approximations which is heavily outdated, but better than nothing.

The covers will be added today (taking inspiration from some LMP1 stuff, we don't need to exactly copy F1), the small wings will be added too but I was wondering which is their function. Do they have the function of limiting the turbulence behind the wheels?

[jjn9128]

The covers will be added today (taking inspiration from some LMP1 stuff, we don't need to exactly copy F1), the small wings will be added too but I was wondering which is their function. Do they have the function of limiting the turbulence behind the wheels?

Yes. Basically they increase pressure around the crown of the tyre and create downwash to delay the separation point and pull the separated flow down faster.

I suggested to Andre that we add some reg boxes around the wheels so we can design these parts ourselves. Not sure if that's a consensus view

Can't remember where I found it but this shows the wheel cover shape, you can estimate diameter from that.

[CAEdevice]

I suggested to Andre that we add some reg boxes around the wheels so we can design these parts ourselves. Not sure if that's a consensus view

It would be great!

[CAEdevice]

This is the latest update: the red transparent volume is an optional part I would suggest to include into the CFD simulation. Considering that we are not simulating the brakes duct, it would allow to save memory and computational resources by reducing the cells number.

[jjn9128]

This is what I did for our articles. The blue bit rotates the orange is static.

[CAEdevice]

This is what I did for our articles. The blue bit rotates the orange is static.

https://db3pap006files.storage.live.com ... pmode=none

Yes more or less the same approach I was suggesting.

[lynch]

How many core/hour per race you are using to optimize the car?

[MaccaRacing]

My PC is able to run only one fast simulation per day.. So I run 6 simulations per week, and the I use the weekend to model new stuff for the incoming week.. But that has not been enough to win...