I think that is essentially what I had posted two days ago
Emery Stora
>
> Actually, in addition to the rotation of the tire, there is a vertical - and just as important - component to this balancing. In a perfectly balanced tire, the beads would distribute themselves evenly around the inner circumference of the tire. When your tire is out of balance, it will bounce vertically as the vehicle moves along the road. So, when a heavy spot moves upward, the beads move downward. The oscillations will get smaller while the beads shift until they provide counterbalance. Any excess bead weight gets distributed evenly throughout the tire.
>
> Inertia and friction will leave beads at the bottom when stopped but the transition to a balanced state takes place very quickly, within seconds.
>
> If it were as simple as rotational "high energy" and "low energy", all the beads would clump together in the "low energy" area. An out-of-balance tire doesn't necessarily mean it's eccentric in shape.
>
> We use them in our motorcycles too - works great!
>
> Dan in NC
> 1976 Eleganza II
>
>>> If someone can explain to me how those are supposed to work, I'm all ears. Until then I'll stick with my spin balance machine. Seems like when
>>> clothes are out of balance in spin cycle they don't shift and self balance but go to the most out of balanced side until the tilt switch is tripped.
>> John,
>>
>> I actually can explain it. The beads or what ever want to roll, bounce, dance or whatall away from the excitement and drama to the lowest energy
>> place they can find. (Remind you of some people you know?). When a rotating element is eccentric, the larger radius is the higher energy. So, the
>> beads go down hill to the low energy area. When they get there, they stay put unless you give them a reason to move.
>>
>> Why doesn't this work in a washing machine?
>> Well, it does until enough water drains out of the tub to loose the weight to the laundry. Since cloths don't flow, the imbalance remains.
>>
>> Would water do as well as the beads? Yes and no....
>> When I worked in a development lab with a senior engineer that was genius level, he often came up with ideas. I had a tire that was out of balance
>> and he came to my office and explained at great length why putting water in that tire would fix it. Of course, my question was,"If this is so easy,
>> why doesn't every body do it?"
>> Well, we did and I found the two reasons why not to use water.
>>
>> The immediate reason was that during testing, I hit a pothole. This is not hard to do in Michigan in the spring. I guess it splashed the water all
>> over inside the tire and it was now profoundly out of balance. I actually had to stop the car both to exhale and let the water regroup. (Then I had
>> to invent a way to get the water out of the tire.)
>> A second issue was that some time later that wheel began a rim leak that got more serious fast. I had to dismount the tire (and dry the inside) then
>> wire brush and paint the rim because it was badly corroded.
>>
>> So, all the beads or pellets have to go is go down hill and the plan works. Yes, I could write equations all over a blackboard to explain this, but I
>> think if you understand going down the hill, you have most of it. What I kind of have to throw in here is the little fact that there really is no
>> such thing as centrifugal force. The force you feel pulling on the string of a weight you are spinning is not actually pulling straight away from the
>> center (your hand) it is merely the force required to keep the mass circling when it really wants to go in a straight line (away in a tangent to the
>> circle the string is forcing on it). This is the true motive power to move the beads down the "hill".
>>
>> I hope this helps.
>>
>> Matt
>
>
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Emery Stora
>
> Actually, in addition to the rotation of the tire, there is a vertical - and just as important - component to this balancing. In a perfectly balanced tire, the beads would distribute themselves evenly around the inner circumference of the tire. When your tire is out of balance, it will bounce vertically as the vehicle moves along the road. So, when a heavy spot moves upward, the beads move downward. The oscillations will get smaller while the beads shift until they provide counterbalance. Any excess bead weight gets distributed evenly throughout the tire.
>
> Inertia and friction will leave beads at the bottom when stopped but the transition to a balanced state takes place very quickly, within seconds.
>
> If it were as simple as rotational "high energy" and "low energy", all the beads would clump together in the "low energy" area. An out-of-balance tire doesn't necessarily mean it's eccentric in shape.
>
> We use them in our motorcycles too - works great!
>
> Dan in NC
> 1976 Eleganza II
>
>>> If someone can explain to me how those are supposed to work, I'm all ears. Until then I'll stick with my spin balance machine. Seems like when
>>> clothes are out of balance in spin cycle they don't shift and self balance but go to the most out of balanced side until the tilt switch is tripped.
>> John,
>>
>> I actually can explain it. The beads or what ever want to roll, bounce, dance or whatall away from the excitement and drama to the lowest energy
>> place they can find. (Remind you of some people you know?). When a rotating element is eccentric, the larger radius is the higher energy. So, the
>> beads go down hill to the low energy area. When they get there, they stay put unless you give them a reason to move.
>>
>> Why doesn't this work in a washing machine?
>> Well, it does until enough water drains out of the tub to loose the weight to the laundry. Since cloths don't flow, the imbalance remains.
>>
>> Would water do as well as the beads? Yes and no....
>> When I worked in a development lab with a senior engineer that was genius level, he often came up with ideas. I had a tire that was out of balance
>> and he came to my office and explained at great length why putting water in that tire would fix it. Of course, my question was,"If this is so easy,
>> why doesn't every body do it?"
>> Well, we did and I found the two reasons why not to use water.
>>
>> The immediate reason was that during testing, I hit a pothole. This is not hard to do in Michigan in the spring. I guess it splashed the water all
>> over inside the tire and it was now profoundly out of balance. I actually had to stop the car both to exhale and let the water regroup. (Then I had
>> to invent a way to get the water out of the tire.)
>> A second issue was that some time later that wheel began a rim leak that got more serious fast. I had to dismount the tire (and dry the inside) then
>> wire brush and paint the rim because it was badly corroded.
>>
>> So, all the beads or pellets have to go is go down hill and the plan works. Yes, I could write equations all over a blackboard to explain this, but I
>> think if you understand going down the hill, you have most of it. What I kind of have to throw in here is the little fact that there really is no
>> such thing as centrifugal force. The force you feel pulling on the string of a weight you are spinning is not actually pulling straight away from the
>> center (your hand) it is merely the force required to keep the mass circling when it really wants to go in a straight line (away in a tangent to the
>> circle the string is forcing on it). This is the true motive power to move the beads down the "hill".
>>
>> I hope this helps.
>>
>> Matt
>
>
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