Hancha Group Single Element Rear Wing

[Hancha Group]

Originally Posted by Vracer111

If it's more GTR style than Tommy Kaira, then count me in as VERY interested in it! FRP would be fine too instead of Carbon Fiber!

http://www.ft86club.com/forums/attac...9&d=1338893588

This is the concept I had in mind. Please excuse the poor drawing skills. It's easiest to imagine it kind of like the current STI wing but about only half as tall. I imagine it won't stand more than 6" off the trunk so it'd be just above the third brake light.



Picture of said STI for reference



Thoughts and opinions welcome. Remember, we won't really get to start development until late summer-early fall so please stay patient with us.

[djliquidsteele]

Now thats badass. As long as its functional for occasional track use, then even better.

[Vracer111]

Originally Posted by Hancha Group

This is the concept I had in mind. Please excuse the poor drawing skills. It's easiest to imagine it kind of like the current STI wing but about only half as tall. I imagine it won't stand more than 6" off the trunk so it'd be just above the third brake light.



Picture of said STI for reference



Thoughts and opinions welcome. Remember, we won't really get to start development until late summer-early fall so please stay patient with us.

Is that an air fence/lip on the trunk lip or a flush piece to square off the rounded trunk lip surface? I was thinking of using a small lip (like the stillen one) in conjunction with the GTR style 'wing'...

I very much like the direction of that concept drawing; however the end product ends up being, it would be nice if the side/fences blended with the design of the 86 as much as possible. That's the only thing I really don't like about all of the lip/spoiler designs I've seen, save for the Stillen which is just a tiny lip that gets rid of the trunk rear roundness. If the supporting structure for the wing element could look like it was actually one with the trunk lid as opposed to an added on piece it would be the most awesome thing ever. More along the oneness of Porsche 911 GT3 RS lines (well it is a single piece...) as opposed to the multiple bulky and a little unsightly elements of the STi lines (you look and it and see five separate pieces without even having to think about it - if there was a way to make the mounts and upright/fences appear as one piece at a glance and also part of the trunk then you would have something that appears more like a two piece design - wing element with trunk/supports/end-plate; like the appearance of the GT3 RS wing where there's trunk and wing element)



But something like that probably means custom trunk right to make it as one unit.... Is there no way to make add on pieces which smoothly blend with factory panels and look as close to a single piece as possible? At least the GT86 has a beveled side and rear areas of the trunk that could be used to an advantage as much as possible to blend with the trunk as much as possible.

[Hancha Group]

An entirely new trunk would be easiest for what you are talking about. Otherwise you need very shallow angles to make the trunk spoiler subtle.

The concept is five pieces: two uprights, the airfoil, and two covers to cover up the adjustment.

[TouchMyHonda]

Earl, I would buy that wing for sure

[chenshuo]

Originally Posted by Hancha Group

A quick rendering just to get an idea of what it could look like on a car

This thing looks as good as a park bench for little kids.
I'm sure this thing is great functionally, but i see two kids sitting on that on a sunny day enjoy ice cream. With all the straight edges, it looks out of place on a car that has so many beautiful curves.

[Hancha Group]

Originally Posted by RYU

I love the top mount myself and wanted to weigh in. I would be interested in a removable mount via the license plate. I personally only want to install a BAW (big ass wing) for track days.

So I had some time to look into this option. In my opinion, I don't think it would be a very good solutions. With the license plate off, there's a lot of flat surface area to mount the base



However, on the other side of the trunk, that is not the case



The sheet metal is very thin and when you are making a lot of downforce, it will be prone to bending and/or shearing completely. However, we may make a tow hook that will mount here in the factory windows cut out in the diffuser:



The tow hook will also double as a mount for the wing that way you can leave the wing or remove it, leave the tow hook or remove it. It will be a heavier solution than we'd ideally like, but it gives you the option to revert everything back to factory with no visible holes or cuts. While it won't be nearly as large or as extreme as the Exotic Air car, to get an idea of what a wing looks like when it's mounted that low:



Earl

[Smudgeous]

Originally Posted by Hancha Group

The tow hook will also double as a mount for the wing that way you can leave the wing or remove it, leave the tow hook or remove it. It will be a heavier solution than we'd ideally like, but it gives you the option to revert everything back to factory with no visible holes or cuts. While it won't be nearly as large or as extreme as the Exotic Air car, to get an idea of what a wing looks like when it's mounted that low:



Earl

Emperor Scorpion on wheels? O.o

[OrbitalEllipses]

Originally Posted by Hancha Group

The sheet metal is very thin and when you are making a lot of downforce, it will be prone to bending and/or shearing completely

Seen it happen on an Impreza; sent it into a tire wall at 149mph.

[RYU]

Thanks for looking into it. There's a way to make a stout mount to support ~100+ lbs but fabricating a rear support brace may not make it worth it. When I have time I'll have a look-see back there also. I see your point about the shear forces. Thanks for the pics.

At say 120mph at full rake how much weight do you think needs to be supportEd?

[Hancha Group]

Originally Posted by RYU

Thanks for looking into it. There's a way to make a stout mount to support ~100+ lbs but fabricating a rear support brace may not make it worth it. When I have time I'll have a look-see back there also. I see your point about the shear forces. Thanks for the pics.

At say 120mph at full rake how much weight do you think needs to be supportEd?

Depends on the wing and placement. Theoretically, the DEW V1 generates excess of 500 lbs so I wouldn't trust the sheet metal alone. Our SEWs makes less and will likely make less in the real world and I'd bet most wings will make significantly less than ours. Paul's still working on the CFD and I'll make sure he posts the data once it's complete. It takes a lot of processing (~4 hours on our workstation, ~24 hours on Paul's PC). However, we will offer a tow hook mount and this is a rendering of what it will roughly look like (the final upright shape will change to place the wing where it needs to be):



While this solution is not ideal, there are some real benefits.

Pros:
The wing is mounted to a structural part of the chassis to better transmit the load
The load is transmitted at the rear most point of the car for better leverage
You get a multi-purpose tow hook (we plan on making a few additional options in the future)
NOTHING is drilled or cut, EVERYTHING can fully be put back to stock

Cons:
The tow hook is loaded in bending and in shear
You need to buy two tow hooks and larger uprights so,
It is heavier
It is more expensive.

If you can deal with the additional cost and additional weight this may be the perfect compromise for having a fully functioning wing at the track and removing it for daily driving.

[ATL BRZ]

I'm warming up to the fully reversible tow hook option. How are the extra long uprights going to deal with cross winds and lateral forces being applied to the wing element? Seems like it would need cross bracing between the uprights to keep the whole thing from moving left/right laterally.

[plucas]

Originally Posted by ATL BRZ

I'm warming up to the fully reversible tow hook option. How are the extra long uprights going to deal with cross winds and lateral forces being applied to the wing element? Seems like it would need cross bracing between the uprights to keep the whole thing from moving left/right laterally.

The solution for the lateral force loading has not been decided yet. First I need to run a few CFD analyses with the car in yaw to find a maximum loading condition. Once the maximum loading condition is found we will run FEA on the uprights. From there we will come up with an engineering decision if it needs bracing and/or how much.

[cdo221]

I like what you guys are doing but do you guys take cosmetic preference into account? I'm just not sure the upside down J mounting looks all that great, is there a functional reason for that sort of solution?