mx5cartalk.com

Hi
I just bought a wing from fleabay and am after some good ideas for holding it up
The legs it came with aren't high enough so I need to extend them or make some new higher ones
I don't want anything outrages just want the wing about level with the roof
It's a race car only so function before beauty
and I don't have a CNC but I can weld sort of

Any good ideas appreciated

Olboy

do you have pics so we can see the assembly of the wing and uprights.
it would help to get ideas on how to raise the height

Fleabay wing on race car. What sort of wing is it?

Have a look here http://mx5cartalk.com/forum/viewtopic.php?p=865359#p865359

Don't know if this will work
If it does then here it is

Engineer it with sufficient strength and support to survive.

Visit the mt.net race prep forum for more info.

Looks like the same support was used on each wing.

Do not underestimate the forces involved with a properly designed wing. A APR GTC-200 can produce up to 118kg of downforce at 190 kmh (without a gurney flap) at 10° AOA . Add at gurney flap at the same speed and it increases to 172 kg at 8° AOA. Interestingly the GTC-200 still produces downforce of 60kg at 130 kmh when set to -2° AOC.

I'm using the Miata version of the APR GTC-200 which has mounts designed that put it on the outside edge of the boot. Over time there is a bend forming in the boot, I will take some shots on the weekend to explain.

As yours is a 2D wing it would need to be mounted in clear air to work efficiently. Height will put even more forces on the mount. Also what class are you running in as, at least for 2B there is limitations on the height a wing can be off the body. Also end plates are an important element of wing design/efficiency. In my opinion the end plates for yours are not suitable for your application.

Are you after downforce in high speed corners (Turn 1 Eastern Creek)? Do you have a front splitter to balance out the rear wing at high speeds?

This is why you need to be sure of what you are asking the wing supports to do.

Magpie and Zossy are on the money, mounting that wing in that fashion will take some thought and effort. It needs to be compliant with the regs you run under, handle the DF and drag loads it will generate (in turn, determined by car performance, airfoil performance and the AoA of the wing), and to be balanced by the front aero so handling is not affected excessively. Note, it is a lot easier to get rear aero performance than at the front so you need to start thinking now about what you might do there.

The boot lid is probably not sufficiently strong to mount a decently performing wing unless strengthened, however (and I am not trying to be snarky) that is an ebay wing and may not be at the cutting edge ... I have seen extensions used between the wing and those mounts to lift those/similar wings higher.

If you are getting serious about racecar aero you will probably want to eventually) replace that wing with one that is more efficient (in lift/drag terms) so you will be wanting to mount something that generates big loads on the rear of the car. Read up here http://www.miataturbo.net/race-prep-75/, and particularly here http://www.miataturbo.net/race-prep-75/post-your-diy-aero-pics-63769/ - that second thread is currently on page 49, so there is a LOT of food for thought there. (I use 'read' deliberately, they are a 'take no prisoners' bunch over there if newbies haven't done their homework or ask questions that have been answered previously.) The yanks also have this http://www.miataturbo.net/race-prep-75/singul%C3%A4r-motorsports-aero-wing-86624/, if your regs allow it it could be a good, if expensive, solution - Chris at MX5 Parts should be able to access them, as it is being sold through Goodwin.

The other thing is to look around the pit area, and see what others are doing, and ask lots of questions.

greenMachine thanks for the link on the GTC250 wing on MT. The mount is exactly what I'm looking for. I may flick them an email to see if the mount can be used with my 200 wing!

I'm just about to get some new CNC wing supports made for my car. I made a mistake when I sent the CAD off to be cut and supplied the 'lightened' version instead of solid. The design is basically the same as the Singular ones but mine don't place the wing as far rearward. The very back of the wing is in line with the back center of the bumper which is a requirement in several CAMS classes. They bolt into the rain channel in the boot via some nutserts. Very easy and quick to remove and you can still open the boot a bit. My existing supports work great but they are just a little flimsy and if I run them I'm expecting to pull into the pits looking like the photos further up in the thread... or worse, end up in the wall.

You can only run this style of wing support on the GTC wings with the correct spacings on the mounting points. I doubt your ebay wing would work like this.

Those look like Singular endplates as well

zossy1 wrote:Engineer it with sufficient strength and support to survive.

Visit the mt.net race prep forum for more info.

these failed where the lightening cut-outs span the width.
if you make new ones or attach extensions it is better to have nested triangulated cut-outs so as not to leave a wide open gap.

madjak wrote:You can only run this style of wing support on the GTC wings with the correct spacings on the mounting points. I doubt your ebay wing would work like this.

Based on the picture the OP posted before it looks like the wing is one of these (same design, possibly different width) http://www.ebay.com.au/itm/Universal-Li ... SwMmBVr1H-

Since it's aluminium rather than carbon I'd think that would make it much easier to move the mounting points towards the edge of the boot or to make it fit a specific rear mount.

Magpie wrote:I'm using the Miata version of the APR GTC-200 which has mounts designed that put it on the outside edge of the boot. Over time there is a bend forming in the boot, I will take some shots on the weekend to explain.

I ordered an APR GTC-200 last week in the NC specific fitment. I wonder if it will do the same to the NC which has an aluminium boot lid.

Magpie wrote:Those look like Singular endplates as well

I designed the endplates halfway between the design Ryan from Singular did and a Mercedes car I used for reference. I emailed Ryan and asked if it was ok to use his design. He is a DIY guy at heart and loved my 3D printed wing so he had no issue with it.

The supports were done 6 months prior to Singular releasing theirs... I think any wing designer would come up with a similar design for a MX5 anyway. the only strong mount point is the rail channel anyway.

Rick

Dan it looks like 949 are no longer making the Specmiata version of the GTC 200 that I have

Here is the way it mounts




End plates have been changed and this was before the bottom of the car was painted silver...


Just because I can, here is the Singular endplates. Madjack I'm impressed with your 3D printed wing as well, you have such nice toys to play with.

Magpie wrote:greenMachine thanks for the link on the GTC250 wing on MT. The mount is exactly what I'm looking for. I may flick them an email to see if the mount can be used with my 200 wing!

Read the thread for Ryan's response to my questions. By all means contact him, but those mounts are too high (IMHO) and too far back. He also failed to reply on the extent of adjustability and issues around car rake. Ryan has been very helpful to me and I am sure he will respond helpfully to others.

madjak wrote:

Magpie wrote:Those look like Singular endplates as well

The supports were done 6 months prior to Singular releasing theirs... I think any wing designer would come up with a similar design for a MX5 anyway. the only strong mount point is the rail channel anyway.Rick

I have gone in a different direction, inspired by 949 - I use the bumper/crash structure. This can be done two ways - through the top of the rear fenders (see Danny's NC) or where the bumper bolts up (my method, a la 949).

What regs are you running Rick, if they are 3D/Sports sedan based, you should be able to go back 100mm behind the bumper - that wing looks very like a 3D wing (400 chord max, 1600 wide). Also, those open supports are very draggy.