[MVRC] Mantium Virtual Racecar Challenge 2025 (Grand Prix Cars)

[CAEdevice]

WE ARE RACING SOON!
[EaJ Racing][/https://imgur.com/a/wR0MUIC]

Welcome, great job. Are you already on LinkedIn? What's the name of the team?

I’m on LinkedIn but only with my personal account - Ján Kapráľ. I reposted it right now.

Thanks!

[yinlad]

My challenger for this year, though I don't expect it to do much challenging. I never really hit the moment when I unlocked this regs and really started to put downforce on the car. Several legality passes really took their toll as the rules became more solidified.

Generally speaking the downforce I was able to pick up was often by simplifying geometry rather than getting more complicated, so it's a bit of a basic car that I don't expect to do well. I tried my best not to 'MVRCify' the design too much (which will probably cost me compared to those who are more willing to push the regs to their limit) in favour of keeping things 'realistic' to how the FIA is intending these rules.

Good luck to all racing this weekend!

[k.ko100v]

Lights out...



This is more or less the final version of the car for the first race.

There are parts which worked well and others not so well, but so far the tests showed balanced results.

Regarding the Pink Beast - I am more than surprised to see a classic cock-bottle shaped rear end.

Good luck to everyone

Regards,
Krasen

[yinlad]

Lights out...
https://imgur.com/fu8OESo.jpg
https://imgur.com/uf1zb7c.jpg

This is more or less the final version of the car for the first race.

There are parts which worked well and others not so well, but so far the tests showed balanced results.

Regarding the Pink Beast - I am more than surprised to see a classic cock-bottle shaped rear end.

Good luck to everyone

Regards,
Krasen

Cock bottle

Your car looks clean, at first glance I’m not sure how you have managed the bodywork / diffuser merge legally given how square the bw volume is in that region I’d have thought the rear bodywork is protruding there

[LVDH]

The cars look super cool. I am very exited to soon receive your cars. This morning another email went out to remind you to submit your cars. The email contains the links to submit them. So make sure, you have received it. If no, you should get in touch with me. Also please follow the submission rules. Just a few things that com eto mind right now:

• No settings file

• Symmetric cars. One radiator per side (talking to you, Koldskaal)

• No mandatory parts (talking to a lot of you guys)

• Correct folder structure, with team name in top folder

So, the disk is quite empty actually, (916Go available) I've tried other disk, shorter path etc... and I still have the same issue.

by the way, I do not know if it's only me but it looks like the STL mandated parts and the parts which are within the MVRC_R09.stp (which was nicely organised!) are not positionned the same way, some 50mm offset there and there, and mandated suspension were not within the suspension fairings I've designed.

These are both things, we need to fix. Please go to the MFlow support page about your issues.
And please point out which parts seems to be miss aligned. This is annoying and should get fixed rather fast.

[The Rusted One]

Rusted GP is going to take the 2 day extension for the Miami GP

I forgot to fully check legality for the last like 10 revisions of my car so I'm gonna have to make some quick changes.

[LVDH]

Rusted GP is going to take the 2 day extension for the Miami GP

I forgot to fully check legality for the last like 10 revisions of my car so I'm gonna have to make some quick changes.

As I have received so many questions regarding the extension, I assume there will be many for this race.
Please have a look at the sporting regulations rule 1.5 about how to do this:
https://mantiumchallenge.com/sporting-r ... mvrc-2025/

[Ft5fTL]

Here is my challenger for the first round:




I went to the route of the "size zero" concept for this one since the rules are kinda similar to the pre- 2022 cars and the cooling is not strict as that era of MVRC. As said before, finding the right balance is very tricky. I had to unload the front wing massively for having a balanced car and i'm still not sure of the balance, it was touch and go on my simulations. I'm suprised no one is talking about the CoP calculations. I agree with the importance of the balance but i dont think it should be calculated how it is on the current sheet. Having CoP at 1.824 equals to 1 second slower lap compared to 1.825 feels illogical. If we are aimin to realistic cars we should also agree to have a realistic calculation system.

[yinlad]

Here is my challenger for the first round:
https://i.imgur.com/y5RrUhN.png
https://i.imgur.com/Q6yVFOn.png
https://i.imgur.com/nXAarpN.png
https://i.imgur.com/LTHeq1n.png
I went to the route of the "size zero" concept for this one since the rules are kinda similar to the pre- 2022 cars and the cooling is not strict as that era of MVRC. As said before, finding the right balance is very tricky. I had to unload the front wing massively for having a balanced car and i'm still not sure of the balance, it was touch and go on my simulations. I'm suprised no one is talking about the CoP calculations. I agree with the importance of the balance but i dont think it should be calculated how it is on the current sheet. Having CoP at 1.824 equals to 1 second slower lap compared to 1.825 feels illogical. If we are aimin to realistic cars we should also agree to have a realistic calculation system.

Lovely renders and the car looks well thought out. It’s interesting to see approaches I had no success with on every other car so far, leaves me even more concerned about my car haha

[variante]

I'm suprised no one is talking about the CoP calculations. I agree with the importance of the balance but i dont think it should be calculated how it is on the current sheet. Having CoP at 1.824 equals to 1 second slower lap compared to 1.825 feels illogical. If we are aimin to realistic cars we should also agree to have a realistic calculation system.

Yeah, what the hell?! I just noticed that.
It should be a continuous laptime curve, without first order discontinuity nearby the 1.825-1.875m flatline.

That would require laptimes within the flatline to be slowed down, or laptimes outside the flatline to be accelerated. If that sound inelegant (although better than the current jump...), we're better off without flatline at all.

By the way, my car should be at 1.830m. Hopefully...

PS: awesome livery, mate. And nicely designed car, like all others so far.

[spacehead3]

The balance is basically the same as it's been the last few years, I've just given you some margin of error this time. Last year several people lost positions due to being slightly off on balance which in reality would have been able to be fine tuned at the racetrack. No real race team is doing final tuning of aero balance in CFD, and I figured you guys don't want to be spending 10 runs trying to get the perfect 0.001 CoP adjustment. You're supposed to be aiming for 1.85 +/- 0.025. I guess we could remove the margin if you really want but you'll just be making more (unrealistic) work for yourself.

[Ft5fTL]

Lovely renders and the car looks well thought out. It’s interesting to see approaches I had no success with on every other car so far, leaves me even more concerned about my car haha

I have no idea if it is successfull at all at this point. Its most certain that i got the best results with this combination but dunno, maybe a clean car like yours is the way. Need to check that "cock bottle" and a tub one like k.ko100v on some simulations. Impressive quality on the cars so far. I'm positively impressed and inspired from EaJ Racing's front wing details.

The balance is basically the same as it's been the last few years, I've just given you some margin of error this time. Last year several people lost positions due to being slightly off on balance which in reality would have been able to be fine tuned at the racetrack. No real race team is doing final tuning of aero balance in CFD, and I figured you guys don't want to be spending 10 runs trying to get the perfect 0.001 CoP adjustment. You're supposed to be aiming for 1.85 +/- 0.025. I guess we could remove the margin if you really want but you'll just be making more (unrealistic) work for yourself.

Well the thing is, i actually spend 10 runs for balancing the car with gurneys, different front wings and wing levels because of this drastic time dropoff. I get your point, but getting 1 second slower because 0.001m off doesnt feel right.

PS: awesome livery, mate. And nicely designed car, like all others so far.

Thanks, we all are waiting the reveal of the mighty Variante car.

[variante]

The issue isn't the flatline. The issue is the jump nearby it.

That will cause unfair (and unrealistic) situations, where better cars will be screwed by worse cars just because their CoP is 1.824m.

[yinlad]

Yeah I’m not sure we should be seeing a 4s lap difference over a 10cm CoP shift. I think there may be a missing 0 in a calculation

[spacehead3]

Alright. I still feel like this is a non-issue but I can agree to tone town the effect a bit... See if you like this better: https://docs.google.com/spreadsheets/d/ ... 5WKzE/copy