02-25-2025, 06:20 PM
|
#1 (permalink)
|
|
Master EcoModder
Join Date: Mar 2010
Location: london, on
Posts: 378
Buggie - '01 Vw Beetle TDI Gls
Thanks: 4
Thanked 45 Times in 33 Posts
|
Gurney flap on new beetle?
How big should it be how high, and really what would be the best shape? I used to have a 1985 Toyota Supra I did had a great big one at the top of the hatch I almost think it might need to be that big
|
|
|
|
 Today
|
|
|
|
Other popular topics in this forum...
|
|
|
|
|
02-25-2025, 08:38 PM
|
#2 (permalink)
|
|
Master EcoModder
Join Date: Aug 2012
Location: northwest of normal
Posts: 29,290
Thanks: 8,331
Thanked 9,089 Times in 7,508 Posts
|
Gurney flap (wickerbill) is small, then you get spoilers and then wings. Each function differently.
The turbo New Beetle had an active spoiler built into the top of the hatch. A wickerbill would be appropriate on it's trailing edge. It's kind of a spoiler on the spoiler.
A wing creates downforce, while a spoiler is basically a vortex generator.
You might want to review this thread: ecomodder.com/forum/showthread.php/aeromods-2001-vw-beetle-19668.html
Julian [banned] Edgar made a similar wing with transparent side plates, but he only has four other threads remaining so it must have been in some other thread. It might be in his Autospeed pages.
Minimal:
ecomodder.com/forum/showthread.php/aeromods-2001-vw-beetle-19668.html#post274074
Maximal:
ecomodder.com/forum/showthread.php/aeromods-2001-vw-beetle-19668-2.html#post324256
__________________
.
.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
___________________
.
.Impossible is just something we haven't done yet. -- Langley Outdoors Academy
|
|
|
|
|
02-25-2025, 11:58 PM
|
#3 (permalink)
|
|
Not Doug
Join Date: Jun 2012
Location: Show Low, AZ
Posts: 12,298
Thanks: 7,305
Thanked 2,243 Times in 1,731 Posts
|
What happened with Julian?
__________________
"Oh if you use math, reason, and logic you will be hated."--OilPan4
|
|
|
|
|
02-26-2025, 02:14 AM
|
#4 (permalink)
|
|
Master EcoModder
Join Date: Aug 2012
Location: northwest of normal
Posts: 29,290
Thanks: 8,331
Thanked 9,089 Times in 7,508 Posts
|
He got crosswise with the mods. Ask aerohead, I forget the details.
edit:
If you can't get enough, he has a new newsletter. Here's a Youtube video from six months ago: My new free newsletter!
__________________
.
.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
___________________
.
.Impossible is just something we haven't done yet. -- Langley Outdoors Academy
Last edited by freebeard; 02-26-2025 at 03:40 AM..
|
|
|
|
|
03-01-2025, 12:53 PM
|
#5 (permalink)
|
|
Master EcoModder
Join Date: Jul 2011
Location: Ann Arbor, Michigan
Posts: 4,208
Thanks: 140
Thanked 2,824 Times in 1,981 Posts
|
No evidence offered for what I suspect, but the roof spoiler of the RSi looks promising.
https://www.coolcarsinchina.com/2018...-rsi-in-china/
Something on the top, might even make something on the bottom effective.
Bottom Example:
https://www.carid.com/sf-pl-mpn/pid-...E&gclsrc=aw.ds
__________________
George
Architect, Artist and Designer of Objects
2012 Infiniti G37X Coupe
1977 Porsche 911s Targa
1998 Chevy S-10 Pick-Up truck
1989 Scat II HP Hovercraft
You cannot sell aerodynamics in a can............
|
|
|
|
|
03-03-2025, 10:05 AM
|
#6 (permalink)
|
|
Somewhat crazed
Join Date: Sep 2013
Location: 1826 miles WSW of Normal
Posts: 4,562
Thanks: 596
Thanked 1,249 Times in 1,101 Posts
|
It's after the high point of the roof, so I wonder if it is operating in disturbed airflow and therefore partially effective. Suspect more drag than downforce BUT it is behind the CG so there would be a stability benefit.
__________________
casual notes from the underground:There are some "experts" out there that in reality don't have a clue as to what they are doing.
|
|
|
|
|
03-06-2025, 01:51 PM
|
#7 (permalink)
|
|
Master EcoModder
Join Date: Jan 2008
Location: Sanger,Texas,U.S.A.
Posts: 16,473
Thanks: 24,500
Thanked 7,436 Times in 4,817 Posts
|
' Gurney flap '
Any drag reduction is going to come from a pressure rise over attached flow, decelerating rearwards on a streamlined diminishing cross-section.
A Gurney flap can't do that.
A truncated Kamm-back is best.
Take a look at roofline 'silhouettes' Volkswagen chose for their :
- Volkswagen 'Flow-Body', L1, XL1
- Porsche 911 GT1, 918, Taycan.
- Audi E-Tron GT
- Bugatti Veyron, Chiron
You just chop the roof off like a loaf of bread, wherever the length is acceptable.
__________________
Photobucket album: http://s1271.photobucket.com/albums/jj622/aerohead2/
|
|
|
|
|
03-06-2025, 02:36 PM
|
#8 (permalink)
|
|
Master EcoModder
Join Date: Aug 2012
Location: northwest of normal
Posts: 29,290
Thanks: 8,331
Thanked 9,089 Times in 7,508 Posts
|
EDAG Biwak Concept 2006
__________________
.
.Without freedom of speech we wouldn't know who all the idiots are. -- anonymous poster
___________________
.
.Impossible is just something we haven't done yet. -- Langley Outdoors Academy
|
|
|
|
|
The Following 2 Users Say Thank You to freebeard For This Useful Post:
|
|
|
03-07-2025, 09:03 PM
|
#9 (permalink)
|
|
Master EcoModder
Join Date: Mar 2010
Location: london, on
Posts: 378
Buggie - '01 Vw Beetle TDI Gls
Thanks: 4
Thanked 45 Times in 33 Posts
|
I love that wagon conversion
|
|
|
|
|
The Following User Says Thank You to bandit86 For This Useful Post:
|
|
|
03-17-2025, 08:24 AM
|
#10 (permalink)
|
|
EcoModding Lurker
Join Date: Mar 2025
Location: Berlin
Posts: 16
Thanks: 0
Thanked 4 Times in 4 Posts
|
The size and shape of the Gurney flap really depend on what you're aiming for—better downforce, reduced drag, or just aesthetics. A larger flap, like the one on your old Supra, can help, but for a New Beetle, something more subtle might work just as well. Testing different angles and heights could give the best results without adding too much turbulence.
|
|
|
|
|
