Roof spoiler?

[onixbonilla]

Hi everyone.
Will like to know the best way to attach the carbon fiber roof spoiler?
Thanks
Onix

[zen]

i used RTV (black silicon) based on the recommendation of Carbon Joe. worked like a charm and filled the gaps on mine since mine is a chop top and the roof is slightly off from stock.

[onixbonilla]

Great!
Thanks for the response Zen!!!
Onix

[volkdent]

Hey Guys,

I've been giving this roof spoiler thing a lot of thought. It is in the exact right location, but involves gluing or screwing a spoiler right smack dab in the middle of your lovely painted roofs.

I have another idea. I havn't yet seen one of these, but I will be building one eventually, and hopefully you guys will get your brains going too. It involves a wing/spoiler that either polyurethanes or even HD 3M double side tapes to *****drumroll******* the rear window. YES, you heard it here first, think of the location the NB turbo rear wing is. It is still high up on the car in the airflow and would be very good at preventing lift, and could be much smaller unlike the big alu wings you see farther down the rear end. By that far down, a lot of the lift has already started. Anyway, this wing could be made of fiberglass or CF, and would just be glued to the rear window.

Initial complaints will be "window, OMG, that's too weak!", but really, A: how fast are you going to go in a bug, B: how big a wing is it going to be C: if it really pushed down on the car that much the roof spoiler would dent the roof right? Those rear windows are a total bich to get out, and with the load of the wings force spread out over the entire top edge of the window, I can't immagine we would ever see a window "blow-in".

I asked Carbon Joe about this, and he could probably duplicate it in CF if we make a plug that we like.

Thoughts?

Jason

[oasis]

I liked the drumroll.

Okay, seriously, for what car are we thinking here? The Beetle/Super Beetle has at least four rear window configurations. Then, there are Karmann Ghias, Type 3 Fastbacks, ...

I'm also wondering from the standpoint of function. Using the New Beetle as an example, there are two main spoilers used. One is the electric one above (or if you prefer "in front of") the rear glass; the other is a static, crescent-looking contraption below the rear window. I have to wonder how effective the latter is despite its larger size.

I bring this up because the rear window on any of the Beetles is lower than the roofline to begin with. I'd be more concerned the accessory did nothing at all than it pushing in the window.

[volkdent]

Originally Posted by oasis

I liked the drumroll.

Thanks, I'm cheese all the way OK!

Okay, seriously, for what car are we thinking here? The Beetle/Super Beetle has at least four rear window configurations. Then, there are Karmann Ghias, Type 3 Fastbacks, ...

Initially and specifically, I'm thinking about the type 1, but the concept could be used on many.

I'm also wondering from the standpoint of function. Using the New Beetle as an example, there are two main spoilers used. One is the electric one above (or if you prefer "in front of") the rear glass; the other is a static, crescent-looking contraption below the rear window. I have to wonder how effective the latter is despite its larger size.

Precisely, the wings lower down I suspect aren't nearly as efficient in creating downforce as the wings higher up. I was in fact referring to the electric one. VW put it there for a specific reason, perhaps one being looks, but they could have put it at the bottom of the window, instead they chose the top.

I bring this up because the rear window on any of the Beetles is lower than the roofline to begin with. I'd be more concerned the accessory did nothing at all than it pushing in the window.

Yep, I think some lift will aready be acting on the roof before it gets to the rear window, but at least thats a good place to nip it in the bud, because I supect the vacuum only increases the farther down the rear end you go.

Jason

[volkdent]

There has to be some engineers who are into GL, I'm sure someone with a little bit of education in that direction could help us out. What about computer modelling simulation of airflow!!!

Jason