Just-Right's Splitter and Canard Development - Update 28-8-2018

[Z4C_er]

Hi Just-right, love reading this post.

Having said that, forgive me if I've missed the part that explains the end result of all this? Will there be GRP or Carbon or moulded parts for us to buy and attach?

 

[Beedub]

The canards aren't my thing aesthetically, but, depending on price of course, I would be interested in the splitter.

Thanks Mangozac! There is still quite a bit of aerodynamic work to be done on the splitter/front diffuser. I will keep you and others updated on the progress. The canards are the priority but nothing stopping a bit of parallel work.

im not sure you heard me the first time.... let me repeat.

Shut.... Up. and take my GOD DAMN money. :evil:

Ahahah. Cheers Beedub! Once things get up and running properly I am sure I can help you with that. :evil: Are you already rocking some aftermarket parts?

yeah a couple bits ... this would really be a nice addition.

 

[BMWZ4MC]

The canards aren't my thing aesthetically, but, depending on price of course, I would be interested in the splitter.

Thanks Mangozac! There is still quite a bit of aerodynamic work to be done on the splitter/front diffuser. I will keep you and others updated on the progress. The canards are the priority but nothing stopping a bit of parallel work.

I’ve been reading a fair amount about legislation around modifications in NSW (I’m about to import my car to Aus) and I’m not sure of the legality of the canards here. I’m still interested in both the canards and the splitter but I’ll need to make specific checks once you start production.

I’m really impressed with your work

 

[just-right]

Looks like interesting work.

I’d be interested in hearing what Cx, CZF and CZR coefficients your base model was producing before you started the mods?

How have you modelled the cooling system/engine bay air flows and were you able to reverse engineer the cars underfloor with the same method you used for the top hat?

Thanks for the reply Christian1000. I won't disclose all the details but I can share that the figures are very close to empirical data on the Z4M coupe. All other details were also obtained using photogrammetry. Areas have been simplified in the interest of the best computational compromise.

Hi Just-right, love reading this post.

Having said that, forgive me if I've missed the part that explains the end result of all this? Will there be GRP or Carbon or moulded parts for us to buy and attach?

Thanks for the post Z4C_er. There is no final product yet so you haven't missed that part I am still working on tweaking a few aerodynamic details for the Canards. There is still a lot of potential in the splitter so I am slowly but surely working through those.

One of the next items in the process is to 3D scan the mating and mounting areas around the car to ensure accuracy and quality. I am currently in contact with various companies to discuss details.

The aim is to create Carbon components. One I have gone through the initial stages I will be able to share more on the various options of carbon and parts.

yeah a couple bits ... this would really be a nice addition.

Thanks Beedub. I will keep you in the loop of any progress.

I’ve been reading a fair amount about legislation around modifications in NSW (I’m about to import my car to Aus) and I’m not sure of the legality of the canards here. I’m still interested in both the canards and the splitter but I’ll need to make specific checks once you start production.

I’m really impressed with your work

Many Thanks BMWZ4MC! There will be more to come! Country specific legislation requirements can vary quite a bit. Please keep me posted on any specific requirements and I will try and help where I can.

 

[Z4C_er]

Looks like interesting work.

I’d be interested in hearing what Cx, CZF and CZR coefficients your base model was producing before you started the mods?

How have you modelled the cooling system/engine bay air flows and were you able to reverse engineer the cars underfloor with the same method you used for the top hat?

Thanks for the reply Christian1000. I won't disclose all the details but I can share that the figures are very close to empirical data on the Z4M coupe. All other details were also obtained using photogrammetry. Areas have been simplified in the interest of the best computational compromise.

Hi Just-right, love reading this post.

Having said that, forgive me if I've missed the part that explains the end result of all this? Will there be GRP or Carbon or moulded parts for us to buy and attach?

Thanks for the post Z4C_er. There is no final product yet so you haven't missed that part I am still working on tweaking a few aerodynamic details for the Canards. There is still a lot of potential in the splitter so I am slowly but surely working through those.

One of the next items in the process is to 3D scan the mating and mounting areas around the car to ensure accuracy and quality. I am currently in contact with various companies to discuss details.

The aim is to create Carbon components. One I have gone through the initial stages I will be able to share more on the various options of carbon and parts.

yeah a couple bits ... this would really be a nice addition.

Thanks Beedub. I will keep you in the loop of any progress.

I’ve been reading a fair amount about legislation around modifications in NSW (I’m about to import my car to Aus) and I’m not sure of the legality of the canards here. I’m still interested in both the canards and the splitter but I’ll need to make specific checks once you start production.

I’m really impressed with your work

Many Thanks BMWZ4MC! There will be more to come! Country specific legislation requirements can vary quite a bit. Please keep me posted on any specific requirements and I will try and help where I can.

OEMs are required to abide certain legislation, but as an aftermarket part you can within reason stick what you like on. The exterior projections requirements and associated guff, I don't believe will apply here.

 

[Christian1000]

Thanks for the reply Christian1000. I won't disclose all the details but I can share that the figures are very close to empirical data on the Z4M coupe. All other details were also obtained using photogrammetry. Areas have been simplified in the interest of the best computational compromise

Good stuff, I was just wondering how well your model was correlating. I was going to compare it to some figures I have got from when I have done some wind tunnel tests of a Z4. With the parts you are looking at accurate cooling airflow and heat exchanger pressure drops and representative underfloor structures are key (but I assume you know that ). Are you using rotating boundary condtions/ sliding mesh for the floor/wheels or is it static ground?

Smokey PR friendly video of some of my recent work
https://youtu.be/Py5w2esUejY

Good luck with the development

 

[Woots]

Are you going to flo-vis the results on car once some are made to confirm the CFD you’re seeing?

 

[just-right]

Good stuff, I was just wondering how well your model was correlating. I was going to compare it to some figures I have got from when I have done some wind tunnel tests of a Z4. With the parts you are looking at accurate cooling airflow and heat exchanger pressure drops and representative underfloor structures are key (but I assume you know that ). Are you using rotating boundary condtions/ sliding mesh for the floor/wheels or is it static ground?

Smokey PR friendly video of some of my recent work
https://youtu.be/Py5w2esUejY

Good luck with the development

Thanks for the interest Christian1000! I recognise a certain German wind tunnel in that video... :wink: What is your involvement on the aero side?

As I am sure you understand I can't share specifics to protect the IP. However, with regards to the simulation all of the physics to model and resolve the flow features accurately have been incorporated. This includes and expands on the topics you touch upon.

Are you going to flo-vis the results on car once some are made to confirm the CFD you’re seeing?

It is something I have been considering. It would help to close the loop with the simulations. Luckily - unlike open wheeled cars - the CFD tends to be more accurate.

 

[just-right]

After approximately 4 days of scanning the Z4MC we have got the data we need. The blue laser scanning allowed us to capture hundreds of millions of data points all over the car. This is not just for the Canards and Splitter but also for other future projects I have in mind. 8)

Here a little sneak peak of the setup.



The scans allow us to reverse engineer hard points, mating faces and establish no-go zones. What is very encouraging is that the photogrammetry is already very accurate in the easy to reach areas. The illustration below shows a partial capture of the underneath.



The next step is to reverse engineer the local surfaces and start finalising the Canard Design.

 

[Mangozac]

That's so cool! The level of detail is insane! How long does it take to do a scan?

 

[just-right]

That's so cool! The level of detail is insane! How long does it take to do a scan?

Thanks Mangozac! Depending on the size and the complexity of the area it can range from a few minutes up to several hours. The scan shown earlier took about 2 hours. The system used is extremely accurate and versatile.

 

[ga41]

This is awesome. Even if it's an old platform (12 year old model now!!) it's amazing to see that smart people are still developing stuff for us! I might not be interested in this for mine as I prefer the full OEM look but i'm certainly happy that it's happening!

Just as a question for you aero geeks, would a full flat underfloor be possible and beneficial?

 

[just-right]

This is awesome. Even if it's an old platform (12 year old model now!!) it's amazing to see that smart people are still developing stuff for us! I might not be interested in this for mine as I prefer the full OEM look but i'm certainly happy that it's happening!

Just as a question for you aero geeks, would a full flat underfloor be possible and beneficial?

Thanks ga41 for your comments, much appreciated! I can only explain it by the immense passion I have and there is for this extraordinary vehicle. My aim has always been to create parts that are functional yet contribute to the lines and styling of the car. A performance increase whilst looking like a GTS/CSL version.

The intent is to utilise existing mountings as much as possible. For the Canards we will have to irreversible affect the bumper, however, for all others parts the aim is to be able to return it all back to full OEM without noticing a thing. 8)

 

[exdos]

Awesome stuff. I can only dream of being able to have such facilities at my disposal.

 

[Beedub]

in.sane.

Exdos if you ever want a workshop to borrow. you can borrow mine on a weekend for FREE if you think you can offer something for the z4m

 

[exdos]

in.sane.

Exdos if you ever want a workshop to borrow. you can borrow mine on a weekend for FREE if you think you can offer something for the z4m

Thanks for your offer Byron.

I actually have a 45' x50' workshop where I do all sorts of different stuff in it, it's the CFD kit that I lust after and I wouldn't mind a pillar lift either...

 

[captainmorgan999]

I will form an orderly queue with cash in my pocket!!!! good work

 

[Argenta]

Top job so far.

 

[just-right]

Thanks for all the comments guys, much appreciated! Apologies for the delays in posting an update, a few weeks of holiday does that to you. Things are going well with the external canard surfaces finalised and ready to go.







We are now in contact with a variety of suppliers trying to pick the best for not only these parts but for any other projects in the future. We are working on a nice mounting method that would aerodynamically seal it to the bumper and leave no fixings exposed.

Good progress is being made on the splitter as well with many more CFD runs performed. The reverse engineering of bumper mounting faces is complete as well as the main external geometry. There will be more information posted on this later!

Hopefully we will have more information soon with regards to the production stage of the canards. Let us know what you think!

 

[Beedub]

i just want the paypal details so i can pay.