Hancha Group Single Element Rear Wing
 

Hello all, I just wanted to let you all know about the single element wing coming down the pipeline here at Hancha Group. The wing airfoil is currently being quoted for manufacturing. First and foremost, this wing will work and will be some of the best quality.

Manufacturing:
The wing airfoil will be made using pre-preg carbon fiber in an autoclave. It will be manufactured in the USA which helps allow us to control the quality. The endplates will probably be waterjetted carbon fiber. The mounting to the car will also probably be waterjetted carbon fiber. All hardware (where loading will be) will be NAS/mil-spec grade.

Development:
Efficient aerodynamics are critical for racecar performance. Aerodynamics is one of the most critical systems of the car and provides one of the highest returns on investment. With the use of advancing computational fluid dynamics (CFD), aerodynamic development can be achieved in all levels of motorsports. This wing is designed for motorsports competition (more street car versions are in the pipeline).

The airfoil profile was developed by a program written by me using the pannel method in matlab. I chose to write my own code over programs like XFOIL for the ability to run many different airfoil shapes quickly and write data to dat files. Since this method is a 2d analysis only, the top choices were then ran with a 3d analysis with basic endplates. These were compared to each other and the best overall profile was chosen. After this, endplates were optimized. This however only analyses the wing in free-stream air, which isn't how the wing will be in real life. So we also analyse the wing on a car (FRS to be exact :D). This allows us to optimize wing location on the car and have data for different angles of attack. This data will also include the changes in aerodynamic balance (very important if racing the car).

After all this development, the design was tweaked and designed for manufacturability (word? lol).

Software:
CAD modeling and drawing are done using PTC Creo 2.0

2D analysis was in matlab which we now use octave instead

CFD is completed using OpenFOAM. Now why do we use OpenFOAM? This question is very easy to answer. OpenFOAM allows unlimited customization to meet our needs as a company. I can change solvers and/or write my own codes. It one of the most common cfd codes in the world and can be used in many applications. OpenFOAM is used in the highest levels of racing including Formula One by many teams including Sauber.

Ok, now I know most do not care about the above. It is all spelled out to give openness to our design process and what all went into the wing.

Below is a few pictures. One is the rendered design of the wing (mounting to the car will change a little for manufacturing and mounting points). Another is the data for the wing. The last two are cfd post-processing renders.

http://i1291.photobucket.com/albums/...ps9e4c3a18.jpg

http://i1291.photobucket.com/albums/...ps78738e83.png

http://i1291.photobucket.com/albums/...psa0a68308.jpg

http://i1291.photobucket.com/albums/...ps490b97a3.jpg

After seeing the picture of the wing, you might be asking why the swan neck design... There is a valid engineering reasoning behind this. Swan necks are mounted to the top of the profile to keep the air less disrupted on the underside of the profile (low pressure side). The low pressure side is where most of the real work is being done. This is the most efficient design available beside the endplates being the mounts. However if the endplates are also the mounts (like modern F1 cars), the wing span is limited.

I hope this explains and shows our work clearly. I hope to hear from you all on this. General pricing should be know pretty soon and I cannot wait to get these made.

Cheers,
Paul

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

http://i1304.photobucket.com/albums/...ps32428831.jpg

Downforce yo!

lol, thanks Tym. Another render

http://i1304.photobucket.com/albums/...ps4349a188.jpg

While I appreciate this kind of aero/downforce development greatly, I am personally not a fan of that wing mounting design. It looks "upside down" from certain angles to me, while I know the wing element is right side up. It might be the way the end plates are mounted that throws it all off for me...

Aside from the odd mounting of the element itself, everything looks like the traditional method of achieving more downforce. The wing hanging further off the back, big surface are on the endplates... the only concern I have, and its a small one, would be that there is no wind tunnel testing to back up the data provided.

The only issue with wind tunnel testing is the cost. The full scale tunnel at windshear is expensive and far away. The aerodyn tunnel is also full scale rolling road but ~$2k an hour. They also have a A2 tunnel, which is substantially cheaper at ~ $500 and hour. The problem with the A2 tunnel however is that it isn't a rolling road tunnel. Both of these are in North Carolina.

Or we could do 1:2 scale testing locally at ARC. Problem with that is making a scale model of the car and wing. Also scale tunnel testing has its own problems relating to reynolds number scaling. This would end up costing more than full scale testing (for a one time testing).

Also wind tunnel testing does have a big problem. Most do not calculate lift created by the tire rotating (some do like the Toyota F1 tunnel). I would still like to do some full scale wind tunnel testing on this wing. I however doubt the funds will be there because wind tunnel time cost will get built into the cost of the wing if it is done.

Thank you for the feedback. It is appreciated :happy0180:

Cheers,
Paul

Exactly why I said it was a small issue. :happy0180:

F1 has seen issues from not using wind tunnel, but they are much high budgets than most people, and driving the cost up just to say it was wind tunnel tested doesnt make sense.

The upright shape can be changed, but we are utilizing the swan neck design because of its aerodynamic benefits. It keeps the air cleaner on the bottom surface of the wing (the more important side). It is a race proven design that many teams are starting to adopt.

The Audi R15 had it

http://i1304.photobucket.com/albums/...ps55de5dd3.jpg

The Cadillac CTS-V

http://i1304.photobucket.com/albums/...ps0e8fadcb.jpg

All the current DTM cars

http://i1304.photobucket.com/albums/...pseeede47b.jpg

When Peugeot went from the 908 to the 90X, they adopted the swan neck as well

http://i1304.photobucket.com/albums/...psc9d48e6f.jpg

We plan on having a traditional bottom mounted wing as well. We are trying to make the wing modular so you can choose the width of the wing, spacing of the upright, whether you want it top or bottom mounted as well.

I am currently in talks with a manufacturer who has the tooling for a wing for they no longer make. We would offer that as a cheaper, bottom mount only wing. We have yet to CFD the wing design, but it was used by an OEM and is race proven. ;) We will CFD it, but since it was used on a car with much higher HP, I suspect it makes more downforce and more drag than our wing. It may be a good solution for the forced induction people. I will release more details as I get them.

Earl

If I were building a race car, I'd probably be drooling over this.

We have a street-oriented spoiler in the pipeline. Probably won't be able to start development on it until the fall, but think of the Tommy Kaira/TRD spoiler style, but a little lower, more subtle, and an adjustable airfoil using our profile :]

This is our Single Element Wing Version 2. It has a traditional bottom-mounted upright. This wing is slightly more efficient than the V1, so it makes slightly less downforce with less drag. This is the recommended wing for N/A cars. This same wing has been used in Grand-Am and British GT and taken class wins in both. More details coming very soon.

http://i1304.photobucket.com/albums/...ps89088199.jpg

Rendering with optional wicker bill.

I like that, what kind of coin does something like that fetch? with mounts..

Thanks! To get the shock value out of the way, the most expensive option would be pre-preg carbon fiber cured in an autoclave with a rod and spar core, with carbon fiber end plates and uprights and will be around $4000.

Our manufacturer is located in the US and builds carbon fiber products for OEMs, professional race teams, and the US military. This is not your typical show car carbon fiber wing.

A picture of the actual wing (the difference is ours will be 60" for the BRZ/FR-S/GT86)

http://i1304.photobucket.com/albums/...psd9023ec9.jpg