Karmann Ghia Wool Tuft Testing

Seba007 · Posted: Thu May 02, 2013 8:34 am Post subject:

I've worked in Formula 1 Aerodynamics for several years, and this book is indeed the bible of all race cars aedodynamicist. Enjoy Smile

http://www.scribd.com/mobile/doc/6819397

Race Cars Aerodynamics - Designing for Speed
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'68 Karmann Ghia Coupe

Altema · Posted: Thu May 02, 2013 8:47 am Post subject:

PS: photos would be good, but it would be better to use a high resolution video instead because it will show how the tuft is moving in areas of turbulence. Video players and editors will allow you to step frame by frame to get a clear picture of how each tuft is behaving, rather than a static photo showing it just sticking out. The tuft could be flapping up and down, side to side, or spinning clockwise. You can also grab video frames and save them for reference. I have several video tools and can help with the analysis if you want. Also have a grasp of aerodynamics from my racing days.

Paul

Jeromerino · Posted: Thu May 02, 2013 11:25 am Post subject:

This is going to be fun. I know there at least a few other Front Rangers lurking here, so c'mon out when we get it together. All I really need to get my Ghia ready is to get and install new window regulators. The gears are worn and the windows don't go all of the way up, which would alter the aerodynamics, even if only slightly.
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1964 Karmann Ghia Coupe
1971 Beetle Sedan

spectre6000 · Posted: Sun May 05, 2013 9:03 pm Post subject:

In order to keep up the momentum, here's what I just finished in preparation for diagramming the results of our little experiment.

Image may have been reduced in size. Click image to view fullscreen.

I took a scan of the body panel repair page of the Bentley Manual and took the pen tool to it in Illustrator. Ready for some red and blue arrows!
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Jason Hopper

-'58 German Market Deluxe Beetle (in progress)
-'84 M1009 CUCV
-'81 K10
"Buy the best, cry once." -Gene Berg
"A cheap man will always buy the cheapest thing available, and then buys another one hoping for a better result, and then spends the rest of his life in misery complaining about it. A thrifty man will buy a good part once and never think about it again." -RockCrusher
"Don't feed the Shitty Parts Monster!" -Me

Jeromerino · Posted: Mon May 06, 2013 9:29 am Post subject:

Alright, you have the Lowlight schematic ready, now you need to get yours to CO. We need to find someone around here with a Fat Chick to make it all complete. I had a friend tell me that someone around here is rocking a red Ghia coupe, but they weren't able to discern the year. On May 17th there is going to be a cruise night in Longmont where the local hotrod club got Longmont to lift the ban on cruising Main St for the night. I'll be on the lookout for it there.
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1964 Karmann Ghia Coupe
1971 Beetle Sedan

spectre6000 · Posted: Mon May 06, 2013 10:10 am Post subject:

I used to see a white 70/71 up in Ned if you know anyone out that way...
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Jason Hopper

-'58 German Market Deluxe Beetle (in progress)
-'84 M1009 CUCV
-'81 K10
"Buy the best, cry once." -Gene Berg
"A cheap man will always buy the cheapest thing available, and then buys another one hoping for a better result, and then spends the rest of his life in misery complaining about it. A thrifty man will buy a good part once and never think about it again." -RockCrusher
"Don't feed the Shitty Parts Monster!" -Me

noslzzp · Samba Member Joined: September 19, 2011 Posts: 147

spectre6000 · Posted: Mon May 06, 2013 2:03 pm Post subject:

Rock 'n roll! I started another thread with a poll for tshirts of the above design just in case anyone is interested. I think it looks pretty baddass, and figured why not. If there's enough interest to cover my expenses I'll throw it out there!

What software is that? FJC found some PC-only stuff and posted some screen shots on STF, but I haven't looked too hard to find any other versions. I don't quite understand what is being shown there, but given the 2D nature of the beast, it might not be all that useful beyond a vague baseline.
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Jason Hopper

-'58 German Market Deluxe Beetle (in progress)
-'84 M1009 CUCV
-'81 K10
"Buy the best, cry once." -Gene Berg
"A cheap man will always buy the cheapest thing available, and then buys another one hoping for a better result, and then spends the rest of his life in misery complaining about it. A thrifty man will buy a good part once and never think about it again." -RockCrusher
"Don't feed the Shitty Parts Monster!" -Me

noslzzp · Samba Member Joined: September 19, 2011 Posts: 147

noslzzp · Samba Member Joined: September 19, 2011 Posts: 147

oh.. and yes, the images above don't really help because they aren't moving. It looks really impressive in the program and you can hand draw on things like spoilers, etc. My flow works like this: 1. hand draw ideas. 2. if they have merit, work on more detail in PhotoShop. 3. Export to png, run in program. 4. Repeat.

like said earlier, it's a fix for ghia withdrawal at the moment.
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Introducing the Basilari 306R.. A low light Ghia, performance chassis and 300HP boxer six.
http://www.basilari.com/category/buildupdates/

cseay1 · Posted: Mon May 06, 2013 2:59 pm Post subject:

I wonder how Phil Knox's Aero Ghia nose would fair in wind tunnel testing

Altema · Posted: Mon May 06, 2013 8:31 pm Post subject:

spectre6000 · Posted: Tue May 07, 2013 10:37 am Post subject:

60s airflow schematic at the ready. 72-74 coming. Not sure if 70/71 is appreciably different aerodynamically from the 72-74 model. Anything that comes off the bumpers will be identical to the 60s models, and the rest should be identical to the 72-74 models.

_________________
Jason Hopper

-'58 German Market Deluxe Beetle (in progress)
-'84 M1009 CUCV
-'81 K10
"Buy the best, cry once." -Gene Berg
"A cheap man will always buy the cheapest thing available, and then buys another one hoping for a better result, and then spends the rest of his life in misery complaining about it. A thrifty man will buy a good part once and never think about it again." -RockCrusher
"Don't feed the Shitty Parts Monster!" -Me

Jeromerino · Posted: Tue May 07, 2013 11:01 am Post subject:

Strong work, man. What graphics/design program are you using?
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1964 Karmann Ghia Coupe
1971 Beetle Sedan

spectre6000 · Posted: Tue May 07, 2013 1:01 pm Post subject:

Thanks! Illustrator CS4 (one of these days I'll have to upgrade...).

Last one! 70s.

_________________
Jason Hopper

-'58 German Market Deluxe Beetle (in progress)
-'84 M1009 CUCV
-'81 K10
"Buy the best, cry once." -Gene Berg
"A cheap man will always buy the cheapest thing available, and then buys another one hoping for a better result, and then spends the rest of his life in misery complaining about it. A thrifty man will buy a good part once and never think about it again." -RockCrusher
"Don't feed the Shitty Parts Monster!" -Me


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