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

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Just-Right's Splitter and Canard Development

Post by just-right » Wed May 09, 2018 9:08 pm

exdos wrote: Mon May 07, 2018 1:37 pm If you "Right Click" on the grey notice from Photobucket where an uploaded photo should be displayed in a thread, and then select "Open Link in New Tab", the selected image will then be displayed in that New Tab. It's far from an ideal solution, but at least you can look at the photos if you are interested enough in a particular thread which should be illustrated. :thumbsup:
Hi exdos I managed to have a look at the photos. Some quite interesting and sound ideas in my view :thumbsup: . The big trouble is that without a flat floor or some regions that are downforce generating the aerodynamic features will have a significantly reduced effect and will break down a lot quicker. In the absence of a flat floor / diffuser managing some of the inevitable losses from existing car components will have only a small reward if any at all.

I also read that some people had questionmarks over the incidence (AoA) of your add ons. A lot of this is based on infinite wing span theory. In your case the local aspect ratio will remain attached for much longer due to the presence of the tip vortex supporting the section. It is worth noting that this vortex can yield a considerable energy loss downstream and the benefits would have to offset this.
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Just-Right's Splitter and Canard Development

Post by just-right » Mon May 21, 2018 11:07 pm

I did a bit more work on the splitter/front diffuser. One of the things to consider is front ride height sensitivity. Although at the moment the local aerodynamic load gain versus the overall weight of the car is still rather benign it is still a good feature to try and incorporate. A nice way to achieve is to avoid a portion of the splitter bottoming out at the lowest front ride heights.
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Splitter-V6-front-editX.jpg
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In this first iteration the central portion is raised to help towards this aim. This also allows for slightly improved flow alignment. The reduction in height of the central portion is an added aesthetic benefit in my view. In addition by incorporating a convex transition it is possible to match some of the lines of the front bumper.
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BOTTOM-Cp-editX.jpg
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At the moment the solution yields similar aerodynamic performance at the test conditions but should delay and reduce the loss in local suction at low front ride heights. Do you like where the design is heading or not, let me know what you think!
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Just-Right's Splitter and Canard Development

Post by MrPT » Tue May 22, 2018 11:21 pm

Like it - clever idea and it might actually end up looking better than the splitters that have a flat bottom.
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Just-Right's Splitter and Canard Development

Post by Argenta » Wed May 23, 2018 7:38 am

I’m not sure, I always questioned that center ”gap” in height. But I realize the practical issues, and altho I’m no Porc-man I like the late 911 Turbo solution with a ”foldable” rubber spoiler. (Which inspired me to ”the rubber solution” on page 1)

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Just-Right's Splitter and Canard Development

Post by just-right » Wed May 30, 2018 10:09 pm

Thanks for the replies MrPT and Argenta.

Unfortunately the renders (especially with the jpg compression on the forum) don't really show the details that well. The design needs more refinement both aerodynamically and aesthetically but I am happy with where it is heading.

I am currently spending a bit of time on the canards. Hopefully I will be able to update on some progress later this week.
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Just-Right's Splitter and Canard Development

Post by just-right » Mon Jun 11, 2018 9:41 pm

I have done a little bit more work on the canards. I have created a bi-plane version with a smaller secondary item that sits higher. There is quite a bit less space here so I had to reduce the chord.
Isometric.jpg
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Isometric-Side.jpg
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The design is starting to flow quite nicely with the sharp edges matching the rest of the car and the endplate detail returning on the splitter. The additional element provides extra downforce due to a local suction and pressurisation increase. It also yields a further improvement in downstream flow management by improving the energy near the bottom of the tyre and a little bit more adjacent to the wheel. The illustration below shows the flow energy distribution with no canard on the left, one canard in the middle and the bi-plane two canard setup on the right. High energy in red and low energy in blue.
CpT-Comparison.jpg
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Ever since I started posting here I have had a lot of interest. So first of all thanks very much for all the replies and private messages it is much appreciated. :cool!: The design of the canards are getting more and more finalised. Based on the amount of positive feedback and interest I am considering selling these to our Z4 community!

If you would be interested and haven’t already let me know could you please reply or send me a private message? If you would like to see tweaks to the design or have any recommendations then please get involved as well! The next step is to increase the size and width.
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Just-Right's Splitter and Canard Development - Update 11-6-2018

Post by Mangozac » Thu Jun 14, 2018 11:21 pm

The canards aren't my thing aesthetically, but, depending on price of course, I would be interested in the splitter.
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Just-Right's Splitter and Canard Development - Update 11-6-2018

Post by Beedub » Fri Jun 15, 2018 10:26 pm

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

Shut.... Up. and take my GOD DAMN money. :evil:
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Just-Right's Splitter and Canard Development - Update 11-6-2018

Post by just-right » Mon Jun 18, 2018 10:41 pm

Mangozac wrote: Thu Jun 14, 2018 11:21 pm 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. :thumbsup:
Beedub wrote: Fri Jun 15, 2018 10:26 pm 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?
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Just-Right's Splitter and Canard Development - Update 11-6-2018

Post by Christian1000 » Wed Jun 20, 2018 11:01 am

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?

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Just-Right's Splitter and Canard Development - Update 11-6-2018

Post by Z4C_er » Wed Jun 20, 2018 12:24 pm

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?
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Just-Right's Splitter and Canard Development - Update 11-6-2018

Post by Beedub » Wed Jun 20, 2018 6:15 pm

just-right wrote: Mon Jun 18, 2018 10:41 pm
Mangozac wrote: Thu Jun 14, 2018 11:21 pm 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. :thumbsup:
Beedub wrote: Fri Jun 15, 2018 10:26 pm 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.
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Just-Right's Splitter and Canard Development - Update 11-6-2018

Post by BMWZ4MC » Sat Jun 23, 2018 4:08 am

just-right wrote: Mon Jun 18, 2018 10:41 pm
Mangozac wrote: Thu Jun 14, 2018 11:21 pm 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. :thumbsup:
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 :thumbsup:
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Just-Right's Splitter and Canard Development - Update 11-6-2018

Post by just-right » Sun Jun 24, 2018 7:10 pm

Christian1000 wrote: Wed Jun 20, 2018 11:01 am 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.
Z4C_er wrote: Wed Jun 20, 2018 12:24 pm 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 :thumbsup: 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.
Beedub wrote: Wed Jun 20, 2018 6:15 pm yeah a couple bits ... this would really be a nice addition.
Thanks Beedub. I will keep you in the loop of any progress. :driving:
BMWZ4MC wrote: Sat Jun 23, 2018 4:08 am 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 :thumbsup:
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.
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Just-Right's Splitter and Canard Development - Update 11-6-2018

Post by Z4C_er » Sun Jun 24, 2018 8:22 pm

just-right wrote: Sun Jun 24, 2018 7:10 pm
Christian1000 wrote: Wed Jun 20, 2018 11:01 am 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.
Z4C_er wrote: Wed Jun 20, 2018 12:24 pm 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 :thumbsup: 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.
Beedub wrote: Wed Jun 20, 2018 6:15 pm yeah a couple bits ... this would really be a nice addition.
Thanks Beedub. I will keep you in the loop of any progress. :driving:
BMWZ4MC wrote: Sat Jun 23, 2018 4:08 am 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 :thumbsup:
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.
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