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Old 05-07-2015, 01:12 AM   #21 (permalink)
BabyDiesel
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Quote:
Originally Posted by freebeard View Post
We talked about me again. I'm sorry.

So, '57 Mercury Turnpike Cruiser style rear skirts? Have you seen bubble skirts?
https://www.google.com/search?q=bubble+fender+skirts

What about the front? skirts or air curtain?
https://www.google.com/search?q=bmw+air+curtain

Edit: Just found this on http://ecomodder.com/forum/showthrea...rts-28821.html
We all talk about our projects, sir. No harm in that I'm actually picking ideas from all you posted earlier!

I did not know bubble skirts even existed till you posted this. I don't know about them... wouldn't you want to fill the frnders till they were flush with the body, instead of "bubbling" them out? It seems like a recipe for slightly increased frontal area, along with being not as aerodynamic. I'll wait for you to prove me wrong

Edit: I did some more reading and they appear to be pretty aero friendly.

About the front skirts: You're link is extremely interesting! I did not know about air curtains. They may be too hard for the average lay person to do correctly, as you would almost need a wind tunnel to see the effect. I have a plan on solid front skirts, similar to basjoos's. In fact, his Aerocivic is my inspiration for continuing aero refinement.

First thing I would have to do is obtain skinnier rims with a higher offset. I am wanting to run 14x4 spare wheels with my tires, which would set them in a good ways. I eventually will run 165/65r14 Potenzas. Then, I want to build an aluminum frame to match the body contours, and use coroplast for covering. This will be hinged at the top, and I will have rollers on the frame. Inside the fender well and on the frame, I want to place rare earth magnets so that there is no chance of a strong side wind pulling them out while driving.

Quote:
Originally Posted by aerohead View Post
When Walter Lay did his wind tunnel research,he found that the drag of an 'ideal' form could be duplicated with an 'optimized' windshield.Both gave Cd 0.12


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With respect to 'reversed' bodies,there is zero wind tunnel studies performed with 'mutilated' forebodies.So we don't have any knowledge about what happens if we disturb the contour of a reversed body to create a 'working' windshield.
If it turns out that we can't,without raising drag,then Hucho would say 'fuggetaboutit', 'cause,the distortion of the radically-raked windshield would be too great to see through.
This Citroen Karen would be impossible to see out of
Crazy how they both have the same Cd.
This "optimized windshield" seems to have a steeper angle than my own. I wonder what penalties there are with a more layed back windshield like mine. Is there a certain way the windshield is shaped that is not shown in the drawing? It would make sense if the windshield pictured was pointed in the middle to redirect air to the sides.

I agree that the Citroen would be hard to see out of, and its rear aerodynamics leaves much to be desired. I am curious to know what benefits there are with a working windshield.

I have thought about building a platform, if you can imagine it, on top of my hood to relax the sharp angles from it to the windshield. I'll post a picture of what I mean to ease confusion

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Past threads:
ZX2 modding thread
Ecomodder's Top 10: How they do it!
ZX2 Aerodynamics: Shooting for 0.15 Cd
ZX2 coast-down testing for Cd & Crr

Last edited by BabyDiesel; 05-07-2015 at 01:35 AM..
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