Jan 21 2009FastSkinz: Improve Your Gas Mileage And Achieve That Coveted Golf Ball Look

stupid.

FAKE!

This is a photoshop job! I guess.....

ribbed? anyone?

Im a f***in' DICK!

well obviously because they wouldn't have a sticker expiring 6/09. it's for press purposes cause a lot of people don't have the ability to picture how things would look.

don't understand why it would be ribbed on the windshield though. i'm thinking too much into this.

piss.

Funny, considering that the reason golf balls have dimples is because in order to keep it round, other forms of aerodynamics (more efficient vehicle-like ones) were unusable...

18-20% ?? Scam.

Now all I have to do is yell 'FOUR!' before mowing over innocent pedestrians.

DJGeorge (#7) is on the right track. Since golf balls are so small, they are dominated by pressure drag, and don't have much skin friction drag. The dimples increase skin friction drag, but in the case of the golf ball, dramatically reduce pressure drag by keeping the flow attached to the surface of the ball.

In the case of a car, since the bodies are designed to keep the flow attached anyway, there would be little-to-no reduction in pressure drag, and a massive increase in skin-friction drag.

James (#8) definitely has it: Scam.

FAKE!!!!

This is a complete photoshop job. You can tell its a fake because the shadow's are all wrong.

This is exactly like that scene in the movie Never Back Down where Max ate a bunch of tacos filled with little children and got sick and looked like a golfball.

forget about the added weight to your vehicle or the fact that you cant put it on your windshield or over the grille, which are the largest frontal areas creating wind drag. I bet you get worse MPG with this on your vehicle.

How in the hell can something like this IMPROVE gas mileage? Adding these dimples to an otherwise aerodynamic body shape only increases friction with passing air, not the opposite.

For the same reasons swimmers shave their entire bodies, you would want less texture on a surface like this not more. The dimples create more drag imo, but scientifically I don't know why it's seen here to help gas mileage. If I am wrong wtf, but please enlighten me

its retarded...flat out retarded.... as flat out retarded as a 4 door ferrari... if anything the dimples (depending on the size of course...) would slightly increase drag... plus they would be the biggest pain in the ass to keep clean (think having to dig out birdshit and bugs with a tiny "mellonballer" looking device) plus any body work needed would cost a fortune (similar to finding the one guy in your entire state able to do aluminum chassis work)

and like a rear end spoiler, the functionality of those would be virtually null under certain speeds (rear spoilers being usless on most cars driving under 114mph)

besides with each car being aerodynamically different....for instance a saleen s7 (wich produces enough downforce to drive inverted), vs a VW beetle, vs a pickup truck, vs a volvo station wagon, vs an alcyone SVX.... some cars would actually do worse with such modification (again...if you were able to get it to a speed where it even matters)

just look atthe douchebags that put the non-functional induction cowels on the hoods of their "rice-pimped-fast n' furious-c***sucker mobiles" thinking it adds the percieved +50HP where in reality it acts as a "front end drag chute" (course we all know that an extra 300lbs in stereo equipment and the 400lb girlfriend in the passenger seat doesnt help either)

ps. the dimples used on VW underbodies are to reduce noise, and don't achieve much else.

The only other application could be to keep the airflow attached in critical situations (like the underside of a race car wing), but in that case, vortex generators are way more efficient (a vortex is like a mini tornado, and it helps keep the airflow attached to the surface it flows over).

how many tanks of gas would you need to buy in order to make up the cost of this shit?

i have a $5000 solution that will save you a dollar a gallon if you want to buy it

This looks like $h!t ...

@13 the swimmers shave their bodies cause the little red razor bumps make them more aerodynamic...

I figure if the dimples in my ass make me run faster, this MUST be a good idea

Too bad you don't run very fast midknight and even worse that you have to shave your sasquatch ass

Golf ball dimples are great! Add these damn things to cars, planes, boats, bikes, your face.... anything at all! It's all more aerodynamic. Really! Give it a try. Gotta watch out for those rogue golfers, though, who have impaired eyesight. One of those bastards just put a 2 iron through my driver's side window when he thought my car was a golf ball. Silly!

@19
I run plenty fast, so long as I have a midget on my shoulders holding a twinkie on a fishing pole just out of my reach. Besides, if i didnt shave my ass, I'd be bogged down by the weight of the hairs and tripping on the longer ones. and dont ask me to braid it, it makes the tripping even worse

FAKE!!!!

This is a complete photoshop job. You can tell its a fake because the shadows are all wrong.

This is exactly like that scene from the movie Never Back Down where Max did a science project called - A layer of air is slipperier than a layer of metal. His theory was that putting dimples on the surface of an aerodynamic surface extends the thickness of the still air on the surface this still air in effect becomes the new surface, whick is less resistant to airflow than a very smoothe surface.

Max did tests where he connected model airplanes with different surface treatments to a string towed on his moped. He measured the pull at specific speeds using a spring scale from his Dad's tackle box. He failed to win the science fair because his project didn't have pictures of naked women in it, like the project about skin tans and cancer.

Hahaha @ "You're obviously not a golfer" tag!! I <3 The Big Lebowski.

#21 Well you didn't say anything about the midget holding the twinkie before, that would make anyone faster. Godspeed midknight!

Braiding asshair isn't popular these days - even the caribbean as far as I know, so don't worry about any requests that could make for a bad trip. Nobody wants that

Erm... WTF kind of moron would buy this line of BS? If you want the "look" (& lose some excess poundage on the car) get a custom carbon/poly mix hood/body panels. But dont think for a second anything you add weight wise to the car will make it faster, espcially if it changes the surface... silly people...

I'm definetly going to put this on my bicycle, this means I will have to pedal 20% less!

I concur - this won't help mileage (though it wouldn't surprise me to see some ass-clown selling it).

I never studied golf balls, but I've taken a couple grad-courses in fluid flow. I agree that they probably cause the boundary layer to separate earlier, but that's the problem - earlier separation (i.e., more turbulent flow) increases flow friction (drag), not decreasing it as they claim.

Thus, it's BS, whether the product is real or not.

turbulent boundary layer is preferable in a flow because it tends to stay attached longer. but i think that transition from laminar to turbulent on average car occurs pretty early dimples or not.

t-diddy is full of shit, its laminar boundary layer that separates easily. turbulent layer creates more friction drag but it stays attached longer therefore reducing wake.

This is how Edward James Olmos got the gold in the 100 meter dash.

Hehe, doesn't it have something to do with the Bernoulli effect created by the dimples or something?

You can do a lot of things Mr. Writer, but tell Bill Nye to f*** himself is not one of those.

Well I just ordered over 4,000 golf balls. I'm going to coat my car in fiberglass and stick these little buggers on while its still goey.

I spent $900 but if this improves m fuel efficiency by 20%, my savings will be in the THOUSANDS after a few years. I have an '07 honda accord and I have to drive 20 miles to work and back each day.

After the balls are on I'll pay another $800 to have it all repainted (a bunch of white golf balls would look real stupid). I'll send pics of my project when its done!

whats next a car that is coated with the yellow fuzz of a tennis ball?

I can see why one would want an early boundary layer separation on a spherical orb that is flying through the air.

Half of the sphere is always on the back, and the sphere is rolling or spinning, so that there is no static front or back, or outer diameter to the direction of travel, so the dimples have to be everywhere.

And separation of the boundary layer induces turbulence and spoils the airflow around the back side of the ball, so that there isn't just a big hole punched through the air, with low pressure behind the ball, in addition to the high pressure in front of it. filling in the low pressure zone behind effectively cuts total drag, without changing the frontal area or spherical shape of the ball itself.

But cars don't operate like golf balls. They don't roll, and tumble, there is a distinct back, front, side, and bottom, and they generally operate in one direction at speed, forward.

Having dimples on the front doesn't help much. Smoother and more tapered is more aerodynamic. The less overall frontal area, and the greater percentage of that frontal area that is not perpendicular to airflow is better. No dimples needed.

The back is a low pressure zone, but there are more efficient ways of separating or spoiling the boundary laminar flow, mostly by spoiler blades (fin like structures, rather than inverse airfoil wings, which are for downforce and traction... or usually decoration.)

Some race cars, and air craft use what are called vortex generators. Little fins and sleek spike structures at strategic locations that channel, and spoil the laminar airflow to have it fill in low pressure areas with eddie currents of air, again cutting drag by reducing low pressure in the wake of an object, in addition to whatever measures are taken to mitigate high pressure in the front of the object.

Vortex generators, dimples, and other devices at strategic locations might help spoil laminar flow, and reduce low pressure wake drag, but wrapping a car in dimpled vinyl, because it works for a golf ball, is a little too simplistic, and won't really help the inherent un-aerodynamic qualities of a Scion XB, which is itself a big brick of an economy car.

it looks like it s suppose to ressemble perforated vinyl.

did anyone else notice that Daisy called FAKE twice this time?

Obviously not fake/photoshopped. The product definitely exists, despite DAISY's claim

Here's the link to the youtube video of it being installed on a NASCAR. http://www.youtube.com/user/FastSkinz

Does it work though? Who knows? I don't know if that looks any different than any other wind tunnel test.

your funny

"Now all I have to do is yell 'FOUR!' before mowing over innocent pedestrians"

That would be FORE