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

Post here information about your own engineering projects, including but not limited to building your own car or designing a virtual car through CAD.
User avatar
hollus
Moderator
Joined: 29 Mar 2009, 01:21
Location: Copenhagen, Denmark

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

Post

Such a pleasure to see you guys still going strong!
Here is a new, shiny, sticky thread for 2025.

(This way for the 2024 thread).
Rivals, not enemies. (Now paraphrased from A. Newey).

AlexTitaneGP
AlexTitaneGP
0
Joined: 17 Oct 2024, 19:36

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

Post

Happy new year to everyone, may 2025 bring you all Cl points and performance you'd like !
From what I've read in this forum, the idea is to move on to 2026 kind of rules ! As said by others I love it too !
I've taken a very quick look to the 2026 set of F1 regs, all the reference volume are described, should you guys need someone to do those cubisch shape to help prepare the new season don't hesitate to ask :)
Regarding the moving aero stuff, I guess we could simply apply a Cd offset on the lapsim when the car is on power limited sector? I don't know what you guys think but I am not super fan of us defining 2 sets of flap angle for the wings ? But since we'll lost a lot of CL and L/D we would need to have some "tricks" in the laptime sim if we'd like to stay in the "F1 " reference.
My English is really not spot on so I'm not sure I could help on the wording of the regs ^^ (sorry for that) but I can't wait to have those regs to start designing that new car.
André, do you have any idea of the timeline for race 1 ?
Thank you very much in advanced for running that challenge ! I can't imagine the amount of time spent behind the scene, really appreciated.

User avatar
LVDH
46
Joined: 31 Mar 2015, 14:23

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

Post

Yes Happy New Year to everyone.
As pointed out in the old thread: Please let me know what you liked about 2024 and what you would like to see for 2025.

User avatar
CAEdevice
49
Joined: 09 Jan 2014, 15:33
Location: Erba, Italy

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

Post

Happy New Year, you will soon receive information on the 2024 awards.

For the moment I would like to share the CAD model of the legality volumes for MVRC 2025 regulations, which is inspired by (but not coincident with) the FIA F1 2026 rules (the differences concern both the volumes themselves and the management of the distance between the wheelbases and the dimensions of the safety cell, which in our case is fixed). These volumes will be used by the STAFF as a reference to write the rulebook.

The following first proposal is a R00 version: some details are missing, both because the final FIA F1 2026 rules are not yet fully defined, and because some volumes (e.g. front wing) will be simplified, as was the case for the MVRC 2024 regulations. The reason for releasing this preliminary draft is to involve the teams in the open source development and discussion of the geometry, without anyone being able to take advantage of it.

As you can see, unlike the FIA F1 regulations, I have prepared some common elements: extended safety cell, suspension, power unit, accessories.

CAD models MVRC R00: http://www.caedevice.net/SERVER/MVRC/20 ... RC_R00.zip
(Released with GNU GPLv2 license, no commercial use allowed).

Image

User avatar
Ft5fTL
26
Joined: 28 Mar 2013, 05:27
Location: Izmir

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

Post

Happy new year everyone.

What i would like is obviously the new 2026 regs but i dont know if it is achievable in a reasonable short time. There is a grabcad post with the 2026 legality volumes but i dunno about how legit it is.

Apart from that, maybe updating bluecfd released to the 2024 build that uses OF12 if the change has any gains to us.

Edit: Ah Matteo beat me to it :D
Mantium Challenge - Pure Power Racing

User avatar
CAEdevice
49
Joined: 09 Jan 2014, 15:33
Location: Erba, Italy

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

Post

Ft5fTL wrote:
13 Jan 2025, 19:18
Happy new year everyone.

What i would like is obviously the new 2026 regs but i dont know if it is achievable in a reasonable short time. There is a grabcad post with the 2026 legality volumes but i dunno about how legit it is.

Apart from that, maybe updating bluecfd released to the 2024 build that uses OF12 if the change has any gains to us.

Edit: Ah Matteo beat me to it :D
The GrabCAD model is good, but even less up-to-date than this one :|

User avatar
Ft5fTL
26
Joined: 28 Mar 2013, 05:27
Location: Izmir

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

Post

It was just a suggestion before i knew you were already working on the 2026 legality volumes. Great work on the volumes.

So i tried on 2 different platforms and none did import the correct way.

FreeCad:
Image

Fusion 360:
Image

Setting up "Import y up" on Fusion just makes it import upside down like FreeCad.
Mantium Challenge - Pure Power Racing

User avatar
Koldskaal
24
Joined: 14 May 2019, 10:02
Location: Denmark

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

Post

IMO it would be very cool to have active aero like the real cars. I imagine this would require two simulations per car, one in high downforce mode and one in low downforce mode. I know this will make a lot of things more complicated, but it seems too significant in the new regulations to ignore.

Another thing I would like to see is a move towards automated scrutineering. Andre and I have been talking about this for years now, and I think my scripts are now ready to be be put to use. I hope to share more on this later this week.

Regarding switching to OF12, didn't OF11 break backwards compatibility? Did they introduce some new great features that make it worth the effort to switch right now?

FYI: The newest version of the technical regulations was released on December 11th. I think there are some minor changes compared to the one Matteo shared.
MVRC - Koldskaal, name: Christian

User avatar
LVDH
46
Joined: 31 Mar 2015, 14:23

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

Post

Ft5fTL wrote:
13 Jan 2025, 19:18
Apart from that, maybe updating bluecfd released to the 2024 build that uses OF12 if the change has any gains to us.
Yes, switching to a new OF version is a must. OF now can run on windows using this Linux stuff but also in Docker. Not sure if blueCFD is still the way to go. I will find out though.



Koldskaal wrote:
14 Jan 2025, 00:44
Another thing I would like to see is a move towards automated scrutineering. Andre and I have been talking about this for years now, and I think my scripts are now ready to be be put to use. I hope to share more on this later this week.
This is also something, we definitely need. This also includes checking the radius on our surfaces. With the tool you have developed, I am not sure how we could make it work. However, I think, it is possible in Blender. But at a minimum, we need to use your tool this year.


Koldskaal wrote:
14 Jan 2025, 00:44
IMO it would be very cool to have active aero like the real cars. I imagine this would require two simulations per car, one in high downforce mode and one in low downforce mode. I know this will make a lot of things more complicated, but it seems too significant in the new regulations to ignore.
Would definitely be cool. Switching to a new OF version opens the door for that. We would not even need two sims. We could run on configuration and then use moving / rotating meshes to switch to the next configuration and then let the flow settle itself. But I think, if we get the big moves done for this year, this would be a goal for the next one.



I think you guys take care of the new rules, so I can focus on the new OF version.

User avatar
CAEdevice
49
Joined: 09 Jan 2014, 15:33
Location: Erba, Italy

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

Post

Ft5fTL wrote:
13 Jan 2025, 22:07
So i tried on 2 different platforms and none did import the correct way.
Thanks for reporting. Exporting an STL from the STEP I get the correct alignment in MFlow, but there might be something wrong in the STEP I shared. To be sure I ask @LVDH to confirm the problem (which will be fixed in the next release).

User avatar
CAEdevice
49
Joined: 09 Jan 2014, 15:33
Location: Erba, Italy

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

Post

Koldskaal wrote:
14 Jan 2025, 00:44
FYI: The newest version of the technical regulations was released on December 11th. I think there are some minor changes compared to the one Matteo shared.
The shared model are referred to the november release fo F1 FIA rules: I could not find the PDF of decemeber update. Can you help me find the link on FIA website?

User avatar
CAEdevice
49
Joined: 09 Jan 2014, 15:33
Location: Erba, Italy

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

Post

I put a detailed image of the proposal for the common parts: by isolating the safety cell and the power unit, I tried to simplify the rules of the airscope area. You could do away with the large upper box we had last year, measuring the equivalent pressure on the horizontal surface above the engine and imposing a minimal roll bar structure. Including these parts would reduce the need for rule control.

Image

User avatar
yinlad
28
Joined: 08 Nov 2019, 20:10

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

Post

CAEdevice wrote:
13 Jan 2025, 19:00
Happy New Year, you will soon receive information on the 2024 awards.

For the moment I would like to share the CAD model of the legality volumes for MVRC 2025 regulations, which is inspired by (but not coincident with) the FIA F1 2026 rules (the differences concern both the volumes themselves and the management of the distance between the wheelbases and the dimensions of the safety cell, which in our case is fixed). These volumes will be used by the STAFF as a reference to write the rulebook.

The following first proposal is a R00 version: some details are missing, both because the final FIA F1 2026 rules are not yet fully defined, and because some volumes (e.g. front wing) will be simplified, as was the case for the MVRC 2024 regulations. The reason for releasing this preliminary draft is to involve the teams in the open source development and discussion of the geometry, without anyone being able to take advantage of it.

As you can see, unlike the FIA F1 regulations, I have prepared some common elements: extended safety cell, suspension, power unit, accessories.

CAD models MVRC R00: http://www.caedevice.net/SERVER/MVRC/20 ... RC_R00.zip
(Released with GNU GPLv2 license, no commercial use allowed).

http://www.caedevice.net/SERVER/MVRC/20 ... RC_R00.png
Happy new year all!

This looks great already honestly. I couldn't ask for much more than what I'm already seeing.

Active aero might be interesting but I suspect quite complex to manage for everyone so isn't a deal breaker for me if we ran 2025 without it.

I'll chip in with my usual comments about radiator flow requirements, the less holes we have to chop in bodywork the better but I'm not overly stressed about it, I wouldn't want it to be too easy either
MVRC - Panthera

User avatar
CAEdevice
49
Joined: 09 Jan 2014, 15:33
Location: Erba, Italy

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

Post

yinlad wrote:
14 Jan 2025, 16:17
I'll chip in with my usual comments about radiator flow requirements, the less holes we have to chop in bodywork the better but I'm not overly stressed about it, I wouldn't want it to be too easy either
The ICE power will decrease from 640kw to 400kW, su I guess that cooling flow will be reduced (more ore less) proportionally (2.8 m3/s >>> 2.0 - 1.8 m3^2)

User avatar
variante
138
Joined: 09 Apr 2012, 11:36
Location: Monza

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

Post

Hello
Any chance to make the monocoque as thin as the engine block? On the lower side only.

Image
Image
Image