12-06-2009, 11:14 PM
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#261 (permalink)
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Moderate your Moderation.
Join Date: Nov 2008
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Pasta - '96 Volkswagen Passat TDi 90 day: 45.22 mpg (US)
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Quote:
Originally Posted by brucey
I really want to re do my tail now after seeing a 15% increase in yours. Damn!
Mine showed up absolutely nothing. But it also was a lot steeper. I fail.
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You don't fail until you give up. You learn, and move on.
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"¿ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"
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12-06-2009, 11:29 PM
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#262 (permalink)
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Master EcoModder
Join Date: Nov 2009
Location: Leadville, CO
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Quote:
Originally Posted by MetroMPG
All the other aero stuff I've done upstream affects the performance of the tail - meaning it wouldn't work as well without these:
- partial grille block,
- headlight gaps sealed
- hood/bumper gap closed
- pass mirror delete,
- partial cowl block,
- wipers were off
- smooth wheel covers
- rear fender skirts
- and the big one: full smooth undertray
- EDIT: forgot radio antenna delete
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Obviously, your recent test results reflect the sum of all your modifications. But (please correct me if I'm wrong), if there is one area that made more of a difference, it seems like work on the aft portion of the car netted bigger results than work on the other areas.
This does seem to be the case with recumbent bicycles. On a recumbent, you present a significantly smaller frontal area, and having done that, even though the air is very dirty forward of the CG, with legs, feet, crank, front wheel, etc., churning the air, once the airflow is past that point, if you can smooth it out and get it to reattach with a rear fairing, you get more speed results than with a front fairing.
A front fairing will give you more comfort than a rear fairing, but there are issues of visibility and the mechanics of steering at the front of the vehicle that make it more complicated. A completely enclosed bike is optimal for efficiency, but crosswind stability and just being able to put your feet on the ground are issues. But if you're going to try to get the most out of one single area, bringing the air back together at the stern seems to work better than cutting through it at the bow.
It looks like your test results corroborate this theory.
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12-06-2009, 11:57 PM
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#263 (permalink)
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Master EcoModder
Join Date: Aug 2008
Location: The Wet Coast, Kanuckistan.
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Fan-moddin-tastic. Absolutely mod-a-licious. 15% is meaty. I bet you would get another 4% from the wheel-tails.
I'm continually amazed by the potential of good aero and the ability of us (mostly) laypersons to beat the OEMs silly with mods that look good. I suppose Aero-beauty is in the eye of the Ecomodder, though.
Congrats!
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Vortex generators are old tech. My new and improved vortex alternators are unstoppable.
"It’s easy to explain how rockets work but explaining the aerodynamics of a wing takes a rocket scientist.
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12-07-2009, 12:02 AM
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#264 (permalink)
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Batman Junior
Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
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Quote:
Originally Posted by brucey
I really want to re do my tail now after seeing a 15% increase in yours. Damn!
Mine showed up absolutely nothing. But it also was a lot steeper. I fail.
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5 words: "tuft testing is your friend."
But you reminded me I also had some questions about your test - posted in your boat tail thread. |
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12-07-2009, 12:12 AM
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#265 (permalink)
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(:
Join Date: Jan 2008
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You know what this means... I have to get out more plywood... or something. 
Great job Metro! 
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12-07-2009, 12:32 AM
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#266 (permalink)
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Master EcoModder
Join Date: Nov 2009
Location: Leadville, CO
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Just get some Coroplast, Frank.
DIY MOAT - Mother Of All Tailboxes |
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12-07-2009, 01:37 AM
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#267 (permalink)
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Moderate your Moderation.
Join Date: Nov 2008
Location: Troy, Pa.
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Quote:
Originally Posted by orange4boy
Fan-moddin-tastic. Absolutely mod-a-licious. 15% is meaty. I bet you would get another 4% from the wheel-tails.
I'm continually amazed by the potential of good aero and the ability of us (mostly) laypersons to beat the OEMs silly with mods that look good. I suppose Aero-beauty is in the eye of the Ecomodder, though.
Congrats!
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I'm Christ, and I stand behind this statement 100%.
This post paid for by the Committee to Agree Needlessly with Obviously Correct Statements. CANOCS is a non-profit organization.
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"¿ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"
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12-07-2009, 01:40 AM
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#268 (permalink)
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Moderate your Moderation.
Join Date: Nov 2008
Location: Troy, Pa.
Posts: 8,919
Pasta - '96 Volkswagen Passat TDi 90 day: 45.22 mpg (US)
Thanks: 1,369
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Quote:
Originally Posted by thatguitarguy
Just get some Coroplast, Frank.
DIY MOAT - Mother Of All Tailboxes |
Jpeg saved. Hellz yeah.
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12-07-2009, 02:03 AM
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#269 (permalink)
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aero guerrilla
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Quote:
Originally Posted by thatguitarguy
Just get some Coroplast, Frank.
DIY MOAT - Mother Of All Tailboxes
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This, and a few others, should go in their own thread to make them easier to come across.
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e·co·mod·ding: the art of turning vehicles into what they should be
What matters is where you're going, not how fast.
"... we humans tend to screw up everything that's good enough as it is...or everything that we're attracted to, we love to go and defile it." - Chris Cornell
[Old] Piwoslaw's Peugeot 307sw modding thread
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12-07-2009, 02:54 AM
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#270 (permalink)
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Moderate your Moderation.
Join Date: Nov 2008
Location: Troy, Pa.
Posts: 8,919
Pasta - '96 Volkswagen Passat TDi 90 day: 45.22 mpg (US)
Thanks: 1,369
Thanked 430 Times in 353 Posts
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Something like a thread for the various templates we use?
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"¿ʞɐǝɹɟ ɐ ǝɹ,noʎ uǝɥʍ 'ʇı ʇ,usı 'ʎlǝuol s,ʇı"
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