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Post by WhutScreenName on Jun 5, 2019 18:03:20 GMT
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Post by GTCGreg on Jun 5, 2019 21:50:09 GMT
I would think snow or ice could really throw it off balance. Or even mud, sand or gravel. |
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Post by the light works on Jun 6, 2019 1:29:33 GMT
I have seen them for industrial off road use - by which I mean equipment ranging from lawnlowers to loaders. I agree that the lack of sidewalls leaves a lot of potential for crud to get inside the tire and unbalance it.
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Post by wvengineer on Jun 6, 2019 2:01:23 GMT
They have been playing around with these sort of aireless tires for decades. I read articles about Honda's take on them when I was in college. Honda said they were 5 years away then. That was ~2003.
Besides the issues of mud and snow getting into the tire and affecting balance, I wonder about how the efficiency of them. There is a lot more rubber to them, which is going to ad a lot of wight which will in turn reduce the mileage of the car. Then you have the added cost compared to a traditional air filled tire.
They already have their place in military and industrial uses, but I don't see them being viable for everyday drivers for a long while yet.
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Post by WhutScreenName on Jun 6, 2019 14:11:44 GMT
They have been playing around with these sort of aireless tires for decades. I read articles about Honda's take on them when I was in college. Honda said they were 5 years away then. That was ~2003. Besides the issues of mud and snow getting into the tire and affecting balance, I wonder about how the efficiency of them. There is a lot more rubber to them, which is going to ad a lot of wight which will in turn reduce the mileage of the car. Then you have the added cost compared to a traditional air filled tire. They already have their place in military and industrial uses, but I don't see them being viable for everyday drivers for a long while yet. One of the other articles I read on this specific tire is that Michelin actually has a number of patents in relation to the development of these tires. They were able to come up with some new process that is a rubber/fiberglass mix for the tire itself. Apparently this makes it much more rigid, and allows the weight to be support on the top of the tire, vs the bottom (don't understand how that works). The article went on to say that cutting several of the spokes on the bottom would not have any effect on the tire because the weight is supported on the top of it. Additionally, because the tire is a little lighter, and will always maintain the correct "pressure" (unlike a deflated air tire), in theory, the tire will last longer than a traditional tire, even though the materials would make it last approximately the same. |
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Post by the light works on Jun 6, 2019 14:25:51 GMT
They have been playing around with these sort of aireless tires for decades. I read articles about Honda's take on them when I was in college. Honda said they were 5 years away then. That was ~2003. Besides the issues of mud and snow getting into the tire and affecting balance, I wonder about how the efficiency of them. There is a lot more rubber to them, which is going to ad a lot of wight which will in turn reduce the mileage of the car. Then you have the added cost compared to a traditional air filled tire. They already have their place in military and industrial uses, but I don't see them being viable for everyday drivers for a long while yet. One of the other articles I read on this specific tire is that Michelin actually has a number of patents in relation to the development of these tires. They were able to come up with some new process that is a rubber/fiberglass mix for the tire itself. Apparently this makes it much more rigid, and allows the weight to be support on the top of the tire, vs the bottom (don't understand how that works). The article went on to say that cutting several of the spokes on the bottom would not have any effect on the tire because the weight is supported on the top of it. Additionally, because the tire is a little lighter, and will always maintain the correct "pressure" (unlike a deflated air tire), in theory, the tire will last longer than a traditional tire, even though the materials would make it last approximately the same. my guess is what they mean is the wheel hangs from the spokes above it rather than sitting on the spokes below it. as far as the tire being lighter making a difference, I found the opposite effect with my truck tires - the ones I bought that weigh five pounds more last a lot longer than the ones that don't. the lighter ones had the tread completely gone in a year. the heavy ones last three years. however, having proper tire pressure CAN make a huge difference. the tires Les Schwab underinflated by 30 pounds had the shoulders worn off in 9 months and barely touched the other 50% of the width of the tread, while the ones the other tire place inflated properly wore evenly, and lasted the whole year. |
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Post by the light works on Jun 7, 2019 15:46:02 GMT
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Post by GTCGreg on Jun 7, 2019 16:02:48 GMT
Looks like that transition from ground tire to air rotor could be a little tough. |
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Post by wvengineer on Jun 7, 2019 23:52:30 GMT
As far as the GoodYear flying car, I can't see those fans being able to pull enough air to lift a car. Not to mention, unless those fans can be feathered, in driving mode, the force they would apply to the supports and on the main frame itself would be rather high. Not to mention having fans rotating on different plans will make the thing a absolute beast to keep under control. You have several large torque sources that have nothing to counteract them. I'm gonna say that this will never "fly" in the real world. Yes, pun intended.
As far as the airless tires, a membrane on the outside of the tire would take care of the issues with dirt and snow getting into the core and affecting balance. In the end, it will come down to cost. How much does it cost to make and how long does it last compared to normal tires? You will likely need to factor in the cost of the rim as well. It doen't look like these will work on normal car rims.
Does beg a question. Could they make the airless tire core with replaceable tread on the outer rim? That could lead to some interesting options. Swap off the tread for different applications. (Summer vs. winter driving, etc)
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Post by the light works on Jun 8, 2019 0:32:02 GMT
As far as the GoodYear flying car, I can't see those fans being able to pull enough air to lift a car. Not to mention, unless those fans can be feathered, in driving mode, the force they would apply to the supports and on the main frame itself would be rather high. Not to mention having fans rotating on different plans will make the thing a absolute beast to keep under control. You have several large torque sources that have nothing to counteract them. I'm gonna say that this will never "fly" in the real world. Yes, pun intended. As far as the airless tires, a membrane on the outside of the tire would take care of the issues with dirt and snow getting into the core and affecting balance. In the end, it will come down to cost. How much does it cost to make and how long does it last compared to normal tires? You will likely need to factor in the cost of the rim as well. It doen't look like these will work on normal car rims. Does beg a question. Could they make the airless tire core with replaceable tread on the outer rim? That could lead to some interesting options. Swap off the tread for different applications. (Summer vs. winter driving, etc) I was thinking they would be putting a lot of air underneath the car - but in theory, they would be spinning much faster to act as rotors. hope you have a good balancing machine. |
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