The Future of Tires - General

[QUOTE=POLOPOZOZO;39105245]Why would lifting the center of the tire give more fuel efficiency? It says less friction but the normal force is still the same? In fact now it's distributed over smaller areas?[/QUOTE] Tyres create rolling resistance, if there's less tyre on the road then there's less rolling resistance.

Problems with these tyres as far as I can see is the lack of dampening. Specially the magnetized ones. Go to picture it, once these tyres hit a bump they will begin to oscillate at there natural frequency, we used dampeners to reduce and stop these oscillation, before hitting another bump, as if the tyre is still oscillating at that point with a max/high amplitude it will go beyond the max amplitude and cause damage to the car, or in the magnets case will just hit the rim. Also very uncomfortable. And if the wheel resonates with the vibration caused by the movement over the road surface, well that will very very uncomfortable too and damaging. I recall this being the same problem with those hummer tyres posted above, the mesh can't dampen the oscillations after a bump. [editline]5th January 2013[/editline] Perhaps inducing a current in the magnets to change their direction of magnetism periodically could emulate dampening, but I imagine that would be difficult and require a smart bit of programming.. but it is possible [editline]5th January 2013[/editline] In fact you can see these undamped oscillations in the hummer video above, when it stops starts and just moves back and forth

god it's not like they're saying they were going to forward any of these into actual development, it was just a fun project for uni engineering students to compete in to get them thinking

[QUOTE=jamzzster;39108579]Problems with these tyres as far as I can see is the lack of dampening. Specially the magnetized ones. Go to picture it, once these tyres hit a bump they will begin to oscillate at there natural frequency, we used dampeners to reduce and stop these oscillation, before hitting another bump, as if the tyre is still oscillating at that point with a max/high amplitude it will go beyond the max amplitude and cause damage to the car, or in the magnets case will just hit the rim. Also very uncomfortable. And if the wheel resonates with the vibration caused by the movement over the road surface, well that will very very uncomfortable too and damaging. I recall this being the same problem with those hummer tyres posted above, the mesh can't dampen the oscillations after a bump. [editline]5th January 2013[/editline] Perhaps inducing a current in the magnets to change their direction of magnetism periodically could emulate dampening, but I imagine that would be difficult and require a smart bit of programming.. but it is possible [/QUOTE] Those maglev wheels are merely a round maglev train hooked around a round maglev track. Maglev trains do not have that bouncing issue, I imagine the maglev tires wouldn't either. You've also got to remember that a car equipped with maglev tires is going to get its final drive through a rotating magnetic field, which will also seek to stabilize the tire. I think it could work for certain applications...certainly not your common daily driver as the immensely powerful permanent magnets in the tire will cost a fortune and the electromagnets in the hub will draw a fuckton of power, but I don't see why they wouldn't function. [quote] In fact you can see these undamped oscillations in the hummer video above, when it stops starts and just moves back and forth[/quote] That exists in pneumatic tires as well. You don't see it with a typical street car because the sidewall is sufficiently stiff that the movement is just a couple of millimeters, but something the weight of that H1 rolling on 44" super swampers is going to bounce about a bit on braking just the same. The forces at play when the tire is rolling seek to stabilize it. It is exxagerated on the airless tire, yes, but it exists in pneumatic tires as well. [QUOTE=tommyc225;39105318]Tyres create rolling resistance, if there's less tyre on the road then there's less rolling resistance.[/QUOTE] And a corresponding increase in tire wear. That animation quite handily demonstrates why an under-inflated pneumatic tire will wear out the shoulders while leaving the center completely unused. I also imagine that, in economy mode, the brakes and steering would be absolutely terrible due to the lack of grip, which means the thing's going to be bouncing around modes pretty often. It's certainly an interesting concept, very creative. But I don't think we'll ever see it on the road.

[QUOTE=lifehole;39092165]if you drive in mud[/QUOTE] who would drive a humvee through mud anyways?

[QUOTE=TehDoctorz;39097809]As opposed to anyone who could just throw a nail in the road now?[/QUOTE] We've had self sealing tires, storage tanks, and other things like that for several decades. We've also had solid tires, or tires that are not reliant upon air pressure since the invention of the wheel. Admittedly, solid tires are not common on autos because they are too rigid and that causes other problems, but you see them frequently on things like forklifts.

I want hover cars

[QUOTE=Jocke;39110429]I want hover cars[/QUOTE] I thought we already had experimental prototype vehicles that could hover like half a foot off the ground with a specific air flow below it, and could also be used in water. I can't remember what it's called, but that hover craft from GTA:SA comes to mind. [t]http://images-mediawiki-sites.thefullwiki.org/02/1/2/1/47067702129436337.jpg[/t]

[QUOTE=endorphinsam;39110783]I thought we already had experimental prototype vehicles that could hover like half a foot off the ground with a specific air flow below it, and could also be used in water. I can't remember what it's called, but that hover craft from GTA:SA comes to mind. [t]http://images-mediawiki-sites.thefullwiki.org/02/1/2/1/47067702129436337.jpg[/t][/QUOTE] Well, yeah. But the only issue is that if you drive that thing in the city you're fucked

so speed humps will be a thing of the past... neat!

[QUOTE=yawmwen;39110286]who would drive a humvee through mud anyways?[/QUOTE] Someone who buys them because of their capabilities...you know...like the US Army :v:

[QUOTE=Killuah;39090628]It always amazes me how far from reality most designers are. Meanwhile engineers care for the real problems: the outrageously dirty production, recycling, micro-dust from friction, temperature challenges and worst of all: The part of the world that isn't the spoiled "western society" using tires as old as 20 years, handsewn to work aka prices.[/QUOTE] True but both play off each other Star Trek was just about as far from reality as it got, yet many of today's tech was inspired and designed off of stylings and ideas that star trek introduced Engineers are what make concepts actually work, and in that process the practical application often works/looks completely different. Or the engineer learns that it simply doesn't work well at all. That said it helps when a designer/creative has a solid understanding of how real world things work. These tire ideas are all retardedly outlandish, for example. The off-road tire in particular would easily cost an incredible amount of money to produce (easily $500) and with all the tiny, breakable parts on it would easily last 4-5X less than a standard tire would. once one of those little things break off or gets worn you'd have to buy a whole new wheel to replace it. The car would cost thousands to run every year from tire replacements alone.

[QUOTE=KorJax;39118028]True but both play off each other Star Trek was just about as far from reality as it got, yet many of today's tech was inspired and designed off of stylings and ideas that star trek introduced Engineers are what make concepts actually work, and in that process the practical application often works/looks completely different. Or the engineer learns that it simply doesn't work well at all. [/QUOTE] can you name any developments which were inspired specifically by Star Trek? though I'll give you that many developments have come from sci-fi fiction, like the jetpack.

[QUOTE=Em See;39124071]can you name any developments which were inspired specifically by Star Trek? though I'll give you that many developments have come from sci-fi fiction, like the jetpack.[/QUOTE] IIRC the guy who invented cellphones got the idea from Star Trek, what made it reality was the invention of the transistor.

[QUOTE=Protocol7;39093889]I feel like I'm watching a tire-oriented trailer for a Wipeout game before they had hovering vehicles[/QUOTE] Reminds me of Gran Turismo 4......or 5...or 6....whatever the fuck the series is up to now.