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Old 12-06-2009, 10:14 PM   #261 (permalink)
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Quote:
Originally Posted by brucey View Post
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.
You don't fail until you give up. You learn, and move on.

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Old 12-06-2009, 10:29 PM   #262 (permalink)
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Quote:
Originally Posted by MetroMPG View Post
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
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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Old 12-06-2009, 10:57 PM   #263 (permalink)
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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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Old 12-06-2009, 11:02 PM   #264 (permalink)
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Quote:
Originally Posted by brucey View Post
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.
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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Old 12-06-2009, 11:12 PM   #265 (permalink)
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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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Old 12-06-2009, 11:32 PM   #266 (permalink)
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Just get some Coroplast, Frank.





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Old 12-07-2009, 12:37 AM   #267 (permalink)
Moderate your Moderation.
 
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Quote:
Originally Posted by orange4boy View Post
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!
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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Old 12-07-2009, 12:40 AM   #268 (permalink)
Moderate your Moderation.
 
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Quote:
Originally Posted by thatguitarguy View Post
Just get some Coroplast, Frank.





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Jpeg saved. Hellz yeah.
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Old 12-07-2009, 01:03 AM   #269 (permalink)
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Quote:
Originally Posted by thatguitarguy View Post
Just get some Coroplast, Frank.

DIY MOAT - Mother Of All Tailboxes
This, and a few others, should go in their own thread to make them easier to come across.
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Piwoslaw's Peugeot 307sw modding thread

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Old 12-07-2009, 01:54 AM   #270 (permalink)
Moderate your Moderation.
 
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Something like a thread for the various templates we use?

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