A twin to Greg's wing

**Z3_GoCar** · 08-23-2012, 10:31 PM

Well Kirk, you asked for it and Greg is anticipating getting his own. So here are the first pictures of Brook's effort to make a top quality wing for ST-U/L.

It took him a bit longer than anticipated to come up with this wing. The tricky part is the sharp leading edge profile. To get this the skins are molded in an autoclave from dry carbon. They don't have the classic shiney surface that the end plates and uprights have becasue of the dry carbon layup, but this is why they are so stiff and light.

**Knestis** · 08-23-2012, 10:51 PM

Tres chic.

< goes to look at GCR for STL hatchback wing mount rules >

K

**Z3_GoCar** · 08-23-2012, 11:05 PM

I think this is the apropriate section:

c. The entire rear wing assembly, including the end plates and
any wicker, shall be mounted a minimum of 6.0 inches below
the peak of the roof

or roll cage main hoop whichever is higher,
measured at the highest point. Cars with a wagonback/notchback/
hatchback style body may have the rear wing assembly,
including the end plates and any wicker, mounted a maximum
of 4.0 inches above the highest point of the roof. For this
subsection, a wagonback/notchback/hatchback style body
(or variations of these) is a car in which the rear edge of the
roofline is no more than 28.0 inches forward of the rearmost

bodywork as measured along the vehicle longitudinal centerline.

**Greg Amy** · 08-24-2012, 08:47 AM

Nice but...I think the wingy-thing is going to have to wait for 2013; there's only 3 weekends left before leaving for Road America, and all three of those have been spoken for. I've got a real engineering exercise on my hands to install that, as I've got a Fiberglas hatch with no structure underneath. Add to that the complexity of having only about 14" total vertical space to deal with*, between the top of the roof and the top of the hatch.

Just too many priorities between trying to do all the other prep and dealing with "real life"... - GA

* Regs requires wing to be 6" below peak of roof. I've got 14" height difference between the hatch and the roof peak. Assuming around 3-4" endplate height means the rear wing needs to be ~4" off the deck. I'm now wondering how effective that will be, and whether it's worth the effort/expense...which is why I don't just want to throw this thing on and go.

I totally f*****d myself when I clarified that hatchback rule this year, defining a "hatchback" by the longitudinal difference. But I knew that going in, so no surprises there...here's a pic before I replaced the hatch with Fiberglas/Lexan; the pen line halfway down that board is 6":