Looking forward to beating up the first schlock who's car hurls one of these into my windshield.
And while I'm at it, I'll stuff him with all the other gimmicks that I'm sure he will have pimped his car with: some "magic gas saving additives", a "hydrogen generator", the inevitable gas-mizer aftermarket computerthing, and every book on the topic I will surely find on his passenger seat.
And then I'll show him how to ride a bike.
Users can experiment with their placement for optimum performance?? That's laughable!!! Unless they're testing it in a wind tunnel or other controlled environment, users won't have a clue whether one configuration is better than another. And why on earth have they placed them in front of the windshield? The point is to generate a vortex to help the air flow cleanly. Used in this way, the air will hit the windshield and immediately lose any benefitial effect of the pods.
Furthermore, I'd be very surprised if the fuel savings generated by the aerodynamic gains made by such a device would ever surpass the initial cost. This type of device serves a function on something like a Mitsubishi Evo, directing the airflow more effectively onto the rear wing, but on your average family car I have strong doubts as to their usefulness.
This type of device belongs on ricer cars, just behind the painted black hood.
Attached with padded rare earth magnets? Seems like an opportunity to get a free collection of these things to, well, I've no idea exactly what, but I'll start with the fridge. An aerodynamically justifiable fridge, ..at last.
Tests in windtunnels have shown... ...typically the model used in windtunnels studies is laminar airflow. In such a steady state you can introduce vortex generators and work out their effect on the flow. But, when you realise that common cars move almost all of their time in turbulent air, these things really make no sense.
VERY funny BeWalt! You know in my case by keeping my tires properly inflated, using synthetic oil, and the magnets on my fuel lines I get such good mileage I have to take some out every now and then? :-P
To me it looks like they are trying to use turbulators on a car. Turbulators work quite differently than vortex generators as the latter are placed on the leading edge and turbulators on the trailing edge.
The laminar flow around a car is quite limited though so I suppose these would work less good than turbulator tape on a glider wing but it might actually work if it reduces backdrag.
I have a friend that commutes 140km a day on a freeway and has a neat diagram over her l/100km consumption. I suppose she would be able to notice a 3, 4 or 5% difference and easily could figure out the best placement of these bumps on her car.
This needs to be adapted for Commercial trucking. In a business where saving one penny per mile can amount to millions of dollars, this has vast potential.
The other advantage is that there's only one basic model for the back end of a trailer.
I have been using "fuel fins" for the past few years which are similar to gas pods. I have placed farthings over the back tire area, partial farthings over the front (only about 2" wide or the tires will touch when turning), farthings on the sides between the tires (about 4" wide tapered near the tires which can touch when going over a hump if the car goes fast), a covering over the bottom part of the front windshield, a horizontal "V" shaped plastic in the front of the car to cut the air and I have drilled numerous holes in the back bumper to allow the air to pass through to prevent suction. My car is a 2003 Toyota Echo and I get about 50 mpg at 50-50 mph. If I lower my speed to about 45 mph, then my mpg increases. I made my farthings and "V" front bumper out of the sides of plastic containers. I placed the "fuel fins" on the top, sides and back trunk below the rear glass of the car.
I have seen similar little gizmos stuck on the back of small Japanese made hatchbacks... The only function claimed by one of the guys was that they covered up the original mounting holes for the stock rear spoiler that had been replaced with a more stylish JDM aftermarket spoiler.... A set of Moon Disk wheel covers or a Beatrush under panel would be more effective in reducing wind drag...
I see few places these will improve aero and almost all others it hurts aero. They are too thick, thus increase frontal area. One needs more, smaller ones to work best with the least drag.
One might use small toy magnetic checkers as well as these overpriced nubs and probably get a better result. Also a tape line kinda like a spoiler flap with the center stuck to itself and the edges on the car, with the flap going up to trip the airflow.
Works best when used together with magnetic bracelets and frequency therapy devices.
I have used votex generators for years [airtabs] and they work great better mileage better handling and better visabilitu in wet/ snow conditions. I even use votex generators on airplanes with great success welcome to the real world. They even keep the back of the vehicle cleaner.
Lavaman may well have half answered this already when he says " have used votex generators for years [airtabs] and they work great better mileage better handling..." suggesting that this type of device can improve the handling performance of a car. I was wondering if anyone knows whether it's possible for something like this to undermine the aerodynamic effects designed into the car by the manufacturer, reducing the handling performance as a result?
Unbelievable. These are nothing more than fat versions of the vortex generators that have been around for years, and have been proven to help maintain laminar flow over aircraft wings, which reduces the wings stall speed and allows a higher angle of attack. I can't see a car going fast enough to get any benefit unless it was a regular autobahn traveller, and certainly not in this country. Did anyone research this beforehand ?
Martin - Shouldn't someone with your credentials take a look at the website before dishing? They are tested to be beneficial on a vehicle when traveling as slow as 35 mph. Of course, GasPods are researched. http://gaspods.com/gaspod-research.html and the research continues http://gaspods.com/gaspod-team.html, and will continue as long as I'm at the helm. GasPods are not vortex generators. They are airfoils, expanding the air. They are optimized to be the perfect size to do so without creating turbulence, eg., acting as vortex generators. Our Designer, Bob Evans, hit it right on the money, which was as much a surprise to the aeronautical engineers who ran the computational analysis (simulated wind tunnel tests), as it obviously will be to you, when you eat your words. Give us a call.
If these catch on even in the slightest way, it won't belong before you can buy knock-offs for a few bucks each at your local auto parts store. And it won't be too long before spandex-clad bicycle riders (maybe including BeWalt) have them on their bike helmets hoping to reduce drag.
Display name Ron was already taken - If I had a dollar for every time I was warned about being knocked off, I could just enjoy living on a private island. I've found a manufacturer within commuting distance of our offices in Santa Barbara, California, who has matched overseas prices, not only for production, but for fabrication of high volume production molds. Here's to bringing manufacturing back to North America.
Thank you, Ben, for helping us to get the word out and about.
LOL on this obvious scam. Good luck Susanne- NOT.
oftenly used a term in race car circles is Down force. it is the same as the lift observed by airplane wings, only it reacts to press down, instead of lifting up.aerodynamics has a very high level of importance in racing today.Mostly the street car although tends to put lift. This is due to the car body shape itself that makes a low pressure above itself.
Somewhat old hat.
If you look at a number of cars from the 1960s such as the Ford Capri and Cortina Mk III, you will see a small curved triangular piece of sheet metal riveted to the frame of the front door quarterlight.
These are vortex generators that massively reduce drag, improve stability and prevent the rear window popping out at speed by bleeding off the low pressure area over the car boot (trunk , for our US Cousins).
I have seen variants of this on various other cars such as small Peugeot hatchbacks too.
A study of a 1950s Citroen DS (so far ahead of its time that even Citroen haven't caught up with it yet) will reveal a number of ingenious aerodynamic tweaks.
Amazing stuff, aerodynamics.
yep its old technology. i've seen similar turbulators fitted to kombis schoolbuses and trucks in an attempt to achieve laminar flow.
This sound totally fishy. Kind of like the "vornado" product that supposedly spun the air going into your air intake to increase gas mileage. And the statement " users can experiment with moving them around to determine the optimum placement." made the product lose all credibility.
It may be based on science but (A) costs too much for something you have to stick on and experiment with, (B) has no proven track record or field testing by credible sources like NASA, Popular Mechanics, Car and Drive, etc. It's sounds like a great product to separate a fool from all of his un-aerodynamic money in his wallet.
I am not sure such devices, especially those put in front of the wind shield are pedestrian friendly in case of an accident ... Remenber that car makers are making effort to suppress such devices that were very efficient pedestrain killers on previous generation of cars. So please don't add them back for unproved and anyway very small gains. Remember that even if you obtain a 5% aerodynamic advantage, this will not mean 5% less gas consumption as the aerodynamic is not the only energy consumer in a car ...