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Rokeby
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Location: Ballamer, Merlin

Re: Damage without Splash Guards - Pic

Wed Jan 12, 2011 5:01 pm

mwalsh wrote: Here are the stock flaps, in front of each wheel. Big one on the fronts.
Tiny one on the rears. Don't know what purpose they serve other than
maybe helping to stop your tires picking up rocks thrown up by other vehicles?
Those little dealies are aero aids. They deflect air from in front and from the
center of the car from hitting the tires, and then getting sucked up into the
vortex/maelstrom of swirling air in the wheel wells, outboard of the wheels,
and even downstream of the wheels. IIRC, if they are done correctly, they are
worth something like a 5% MPG/eMPG increase.

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EVDRIVER
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Re: Damage without Splash Guards - Pic

Wed Jan 12, 2011 5:04 pm

mogur wrote:I believe they are aerodynamic aids to reduce the drag of the tires. Which makes me wonder how much drag the mud flaps add...
mwalsh wrote:
Here are the stock flaps, in front of each wheel. Big one on the fronts. Tiny one on the rears. Don't know what purpose they serve other than maybe helping to stop your tires picking up rocks thrown up by other vehicles

This is the reason I skipped them. Things like this can really add drag and mess up the flow of air. If the damage on the car is from normal driving and rocks being kicked up then Nissan is going to have a huge CS issue, it makes no sense.

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Rokeby
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Re: Damage without Splash Guards - Pic

Wed Jan 12, 2011 5:14 pm

EVDRIVER wrote: Things like this [mud/spray guards/flaps} can really add drag and
mess up the flow of air.
At least on the Prius, no one has been able to identify/value any
aero/MPG reduction due having the guards. It would take serious
computer simulation and wind tunnel time -- $$$ -- to do so.

This is not entirely surprising. The air flow right behind the wheels,
at least in the computer simulations that I have seen, is a real mess.
It is swirling, turning back on itself, being pulled up over the tire, etc.
An aerodynamicist's worst nightmare. Apparently adding the guards/
flaps doesn't make it any worse. Remember, if they work properly, the
air dams in front of the wheels are deflecting air around the tire in
something like a parabola. Arguably, the guards/flaps are in this
"wind shadow."
Last edited by Rokeby on Wed Jan 12, 2011 5:23 pm, edited 1 time in total.

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Randy
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Leaf Number: 0191
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Re: Damage without Splash Guards - Pic

Wed Jan 12, 2011 5:14 pm

EVDriver,
The small flaps that MWalsh posted photos of are not the optional Nissan mud flaps. I thought every LEAF came with the small ones.

I have posted photos of my optional mud flaps on this thread:
http://www.mynissanleaf.com/viewtopic.php?f=27&t=2258

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Boomer23
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Re: Damage without Splash Guards - Pic

Wed Jan 12, 2011 5:28 pm

mwalsh wrote:
Rokeby wrote:I'm sticking with parking lot rash or OEM paint issues...
and add backing into something... it's the rear of the car, right?
I gots me some mud there, but I'm not going anyplace near gravel!
Mike, Dude, your English suddenly went south on this thread! Was there a Wine & Cheese party at the end of work today? :lol:
2018 Tesla Model 3 Long Range RWD
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EVDRIVER
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Re: Damage without Splash Guards - Pic

Wed Jan 12, 2011 5:34 pm

Randy wrote:EVDriver,
The small flaps that MWalsh posted photos of are not the optional Nissan mud flaps. I thought every LEAF came with the small ones.

I have posted photos of my optional mud flaps on this thread:
http://www.mynissanleaf.com/viewtopic.php?f=27&t=2258

Yes, I know, I meant the large ones.

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LakeLeaf
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Re: Damage without Splash Guards - Pic

Wed Jan 12, 2011 5:44 pm

It would be very disappointing if the paint chipped that easily - hopefully that's just some road tar.

ts31825
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Location: San Diego

Re: Damage without Splash Guards - Pic

Wed Jan 12, 2011 5:55 pm

I have a Silver leaf with the same symptom...but there is no damage...just road grime...which I am able to wash off. BTW I do not have the splash guards.

I really can't tell if the there is any damage on the car in the photo...however on my car there is no damage after 400 miles. :)

What would be telling is someone who has the splash guards to see if they are seeing any dirt gather in the same area. Something tells me that the splash guard will not completely eliminate dirt collecting in the area.

Glen

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Rokeby
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Re: Damage without Splash Guards - Pic

Wed Jan 12, 2011 6:25 pm

There are times when mud guards/flaps aren't going to cut it:

Image
Early Gen II Prius pulled out of a ditch by 4x4

Image
Rally car.

EVNation
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Re: Damage without Splash Guards - Pic

Wed Jan 12, 2011 6:59 pm

That's my car guys. It is just road dirt. Wipes right off. But looks terrible on the white car. They told me it would be a long while before after market mudguards are available. They are using them all for those who ordered. So order up front. I think you will be happy you did.

I think the aerodynamics lead to it being more pronounced on the leaf. The back end tapers behind the wheel.

-Jeff

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