Ford Sierra XR4i Bi-Wing Spoiler? - Page 2 - Fuel Economy, Hypermiling, EcoModding News and Forum

freebeard · 03-24-2021, 05:28 PM

Have you reviewed ecomodder.com: Morelli's 'Fluid Tail'?

JacobLeSann · 03-24-2021, 10:18 PM

I have not. Thanks for the heads up.

Wonder if this could be applied to a notchback car?

freebeard · 03-24-2021, 10:43 PM

Volkswagen Golf GTI W-12 650

Technically, a hatchback modded into a bubble-top coupe.

JacobLeSann · 03-24-2021, 11:31 PM

Where have I seen this before?

Do you have any possible papers/info describing how the aerodynamics of the car function?

freebeard · 03-25-2021, 01:28 AM

Wörthersee?

There are all the articles in the link I provided. I'm not sure which one is best.

Long story short, it was a one-off concept built for an annual meet at Wörthersee, Top Gear's verdict was 'not sorted'. It has a very short wheelbase for 200mph.

The idea was to preserve the hatchback roofline and get massive downforce without a tacked-on wing. One way to look at it is as three internal ducts feeding the wake. Another is as two flying buttresses tied to a towel-rack wing.

There's a custom bubbletop over the W-12.

JulianEdgar · 03-25-2021, 02:25 AM

Quote:

Originally Posted by freebeard

Have you reviewed ecomodder.com: Morelli's 'Fluid Tail'?

No one seems to be mentioning that it was a lot more than you can see here - centrifugal fan fitted to rear wheels, inbuilt ducts within wheel arch, etc.

19bonestock88 · 03-25-2021, 06:36 AM

Quote:

Originally Posted by freebeard

Wörthersee?

Another is as two flying buttresses tied to a towel-rack wing.

There's a custom bubbletop over the W-12.

That’s kinda what I had in mind for my Saturn. The roof shape is reminiscent of a bubble top, and I planted big flying buttresses and it did occur to me to attach a “towel rack” wing to them to aid in aero. I figured if I made it adjustable I could find the best angle of attack for drag and then another one for downforce. You know, for when I wanna track it

JacobLeSann · 03-25-2021, 12:03 PM

..I got some studying to do, nowhere near as knowledgeable on this as you guys.

freebeard · 03-25-2021, 12:45 PM

Here's something that surpasses my nderstanding.

A wind/electric hybrid that is pushed forward by quartering winds.

JacobLeSann · 03-25-2021, 01:30 PM

No idea either.

The effect does happen in certain crosswinds in a velomobile, though. That’s about all I know.