Having run Airtabs on two trucks over the last 15 years the difference in preformance was profound, lane walk was gone, swaying gone. The truck went straight down the road, thus reducing fetige

@waitingforthereturn

2 жыл бұрын

Profound!

First heard about them in the late 1980s or early 1990s while watching a TV program called 'Beyond 2000.' There's also an episode where they show a truck-tractor that you don't have to climb up into because it's about as high as the standard car.

@chrispompano

9 ай бұрын

I'm so happy someone else remembers that show......I loved that show. There are some episodes downloaded on YT. I know I taped A few on VHS!!! like the car interior sound cancellation used a DSP thru the cars stereo......! That was the coolest show! There was also another similar tech-show around the same time........ I can't remember the name of it.

Vortex Generators use the same effect that golf-ball dimples use, except on a golf-ball we don't know where the front and back is because the ball is spinning, so we cover the entire ball, whereas on a car or plane we do indeed know where the front and back is, so we only place them strategically instead of covering the entire thing.

@windowsxseven

3 жыл бұрын

This explanation is completely wrong

If this were true, all truck manufacturers would use this. They work, just not at highway speeds imo...

You should put this video on rumble

why is there no link to purchase in description ?

Your animation at 2:08 looks completely unbelievable. Do you people have even rudimentary CFD software in house?

@windowsxseven

3 жыл бұрын

That's some colorful fluid dynamics right there

@durim187

3 жыл бұрын

@@windowsxseven looks more like a magnetic field than air flow

@windowsxseven

3 жыл бұрын

@@durim187 4:38 also looks sketchy af, there is no way that the flow will be that smooth between the first gap and especially not after the truck's trailing edge

@durim187

3 жыл бұрын

@@windowsxseven lol and why the wake has curls?

@norbert.kiszka

2 жыл бұрын

@@durim187 air same as water, have viscosity: en.wikipedia.org/wiki/Viscosity

Aircraft manufacturers in fact put vortex generators on certain locations on the wings to manage airflow over the airfoil. Whether they produce results in this application is uncertain.

what would be a good position to place vortex generator on a cube like a kia soul?

im always looking for savings to put more in my pocket , i bought them and the drag reduction you feel it right away , (savings )decided to increase speed from 68 to 70 mph and im still making better fuel milage than b4

I bought award winning knock-off's on Ebay for half the price.

@ryanlogan2911

Жыл бұрын

How did they work?

@midnight121190

6 ай бұрын

Link?

So turbulence you stated is bad, but a vortex generator produces turbulence to prevent airflow separation.

@rajeshr6440

5 жыл бұрын

Nop vortex generators reduce drag, without vortex generator especially the rear side will drag a big chunk of air with it

@scarter176

8 ай бұрын

VG’s keep boundary layer attached thereby reducing drag

What would an air tab mounted on the wheels do?

@86czr7

Жыл бұрын

Spin

@keeancollins1234

Жыл бұрын

@@86czr7 🤣

@rp9674

Жыл бұрын

Pretty sure the car would fly, maybe front edge of the wheel well?

@godfreypoon5148

Жыл бұрын

It will cause a black hole. Do NOT do this.

I use 4 on my Ford Focus

@mattmeagher365

3 жыл бұрын

How does it work on your Ford?

6:40

If these things are so effective, why don't any truck, trailer, or RV manufacturers incorporate them in their body designs? I mean, these things are not expensive to make and could be part of the body panel designs, not requiring that they be stuck on with double-stick tape. And, these things aren't cheap, either. So, how many miles must you drive in order to recover the $250.00 cost in the form of fuel savings? What I need is quantifiable data that compares and contrasts the effects both with and without the devices? And, this video only asks that question, rather than answering it.

@phasorthunder1157

6 жыл бұрын

Here is a source that shows the beneficial effects of these types of Vortex Generators. www.autospeed.com/cms/article.html?&A=113219 This reduces Wake Drag. Here is a video explaining vortex generators, kzread.info/dash/bejne/l4Rhu7d9lZyudpM.html. They are applied on plane wings and even on high speed race cars, because they have more benefits at higher speeds. The most likely reason they arent applied on normal cars is because they can look rather ugly and most people would take looks over benefits.

@julianabeckendorf638

6 жыл бұрын

Richard, They come in panels, and at $100 per trailer/ truck, so not that much really. See more on www.v-spoilers.com

@killroy2993

5 жыл бұрын

They do, fuel tankers run them

@gschaaf713

5 жыл бұрын

While I agree with you that the video should provide quantifiable data to support their claims, these do work. They help mix the faster moving air with the boundary layer air on the rear and side vehicle slopes which reduces the size of the low pressure air pocket behind the vehicle - reducing low pressure drag. I ordered some for my corolla after researching the concept. I will link a youtube video of a real world experiment demonstrating the effect of the vortex generators on airflow when positioned just above the rear windshield. I cant wait to do some real world MPG testing when I get mine. kzread.info/dash/bejne/a6SEttd_f5yuc7A.html

@rickkorallus1162

3 жыл бұрын

There is a large fleet in my hometown that runs these on all their trucks. I’m getting 8.5 miles per gallon on my company truck running regional. Figure a 2 to 5% gain three dollars a gallon diesel. I do 100,000 miles a year.

3:10 - I didn't know that NASA is performing tests on hoaxes...maybe because they didn't test such things? Maybe that's why they didn't include any link on NASA's website regarding such tests...

@mantasisganaitis2281

6 жыл бұрын

I'd say NACA duct is a bit similar

@calvinengler8091

6 жыл бұрын

Its just a vortex generator

@domminion599

6 жыл бұрын

Marius Lazar Google Naca duct.

@senatorfrisky

5 жыл бұрын

It's not just a vortex generator. It's a wishbone vortex generator, which is less tall than a normal strake or fin, so has less drag penalty per vortex created. NASA study citation: doi.org/10.2514/3.12282

Design the tractors properly, you don't need those things!

haha those flow "simulations" aren't even real. your need to fake it proves your design has a big flaw and i know what it is. parasite drag. please stop your marketing bs

As the old saying goes, if you want to build a fast car it's best to have some of that oil money in your bank account 1st