[MVRC] Mantium Virtual Racecar Challenge 2019 (Grand Prix Cars)

[CAEdevice]

The problem is that (lRef corrected) I obtain cop 1.95 and cop 0.600 from the same geometry, with very small differences (cooling inlets surface increased of 5% and different rear wing endplates).

My geometry is clean, I am sure STL quality is much more than good.

Tonight I will try to run a simulation with slightly intersecting parts, to be sure that the gaps are not between the parts.
I am not an expert of OF, but in the KVRC era, I remeber a similar situation and a "merge" parameter to be set.

[CAEdevice]

Is it correct that the planck end is on the rear wheels axle? Isn't it a bit too long?

[jjn9128]

And yes, the coarse meshes do not help to keep vortex structures alive. With turbulence models, I can only do so much. I have at least added more refined mesh in the MFlow version used for this race, esp. behind the front wing.

Not a criticism just an observation. It's not F1 running 250million cell meshes with LES and bespoke turb models. Means you can't be too reliant on the flow field in the way proper teams are though.

[jjn9128]

Is it correct that the planck end is on the rear wheels axle? Isn't it a bit too long?

Proper plank for F1 is 430mm behind front axle to rear axle. Think this is the same.

[CAEdevice]

Is it correct that the planck end is on the rear wheels axle? Isn't it a bit too long?

Proper plank for F1 is 430mm behind front axle to rear axle. Think this is the same.

...but vertically chamfered and not with a step 500mm wide

Anyway: I think this is related to LDVH thoughs about balance, but not the principal problem.

[machin]

Is it correct that....

If you don’t win this first round Matteo there will be only one reason; you spent too long pointlessly comparing FIA F1 cars with MVRC Grand Prix cars....

[CAEdevice]

Is it correct that....

If you don’t win this first round Matteo there will be only one reason; you spent too long pointlessly comparing FIA F1 cars with MVRC Grand Prix cars....

On the contrary! I would eliminate the planck (maybe the step too): no matter if F1 have it, we don't need to keep the car far from the ground: suspensions are a template. The same for the nose section (btw: s-ducts are not allowed by the inner safety volume... or cell?). I did not have F1 as a unique reference: my sidepods outlets are copied from the Dallara GP2 (I think F1 cars use special hxs with high performances: our cars hxs work in a more ordinary way).

... but you are right, I lost a couple of weeks thinking too much about rules and templates.

I was considering the wrong approach, but I was used to work on the refined LMPx cars: this year the development starts from an earlier stage. Anyway, a small updated to the step shape would help with balance, but let's wait and see all the cars and the numbers (I can't wait!).

[Thomas2019]

Work in progress.


Currently trying to figure out barge boards.

[machin]

I ran machin's car from a few days back and get 2,71m³/s cooling flow. So not quite there yet.

Thomas

Ah! Interesting! So my car will be down on power for the first race then... since I sent it to Andre yesterday...

...unless the changes on the “works” car make a difference...

[machin]

This is more or less the car for the first race: it is the first time I submit a car that has not been tested with the official template.
I am not happy about that, it is a kind of bet.

https://www.caedevice.net/SERVER/MVRC/2 ... 07_002.jpg

Looks nice; I like your take on the nose cone; stylish.

What do you mean by “not tested with the official template”?

[machin]

Work in progress.
https://abload.de/img/car3bukpf.png

Currently trying to figure out barge boards.

Looks like you maximised use of the front wing volumes!

[variante]

There we go:




(not necessarily the version that i'm going to race)

[rjsa]

Got a small sidepod too, but cooling not there yet.

[Thomas2019]

So what happens if a team cannot get sufficient rear downforce and the balance is all over the place? Is there a penalty applied?

[machin]

So what happens if a team cannot get sufficient rear downforce and the balance is all over the place? Is there a penalty applied?

There’s no “penalty”, but your car will be slow if you have little rear downforce, as it won’t be able to corner as fast, plus you’ll be generating unnecessary drag at the front, which will slow you on the straights... if you can’t get enough rear downforce, you should decrease front downforce to compensate...

Here’s a link to Virtual Stopwatch which we use for determining the laptimes...

http://www.competition-car-engineering. ... Timing.htm