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#1
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and the answer is... Magnets!
https://bikerumor.com/2020/01/06/pat...don-wave-tech/
-- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 |
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#2
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and the answer is... Magnets!
On Friday, January 10, 2020 at 10:14:09 AM UTC-8, AMuzi wrote:
https://bikerumor.com/2020/01/06/pat...don-wave-tech/ -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 Doesn't it seem sort of silly that you would drill a million holes in a chainring to make them as light as possible and then stick steel magnets on them? On 1 x's I suppose the problem is going to be chain retention what with very wide rear cog ratios nd no front derailleur to hold them in place. But don't you think a plastic retention cage would both work better and be lighter? |
#4
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and the answer is... Magnets!
On 1/12/2020 3:28 PM, Tim McNamara wrote:
On Fri, 10 Jan 2020 10:31:40 -0800 (PST), wrote: On Friday, January 10, 2020 at 10:14:09 AM UTC-8, AMuzi wrote: https://bikerumor.com/2020/01/06/pat...don-wave-tech/ -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 Doesn't it seem sort of silly that you would drill a million holes in a chainring to make them as light as possible and then stick steel magnets on them? On 1 x's I suppose the problem is going to be chain retention what with very wide rear cog ratios nd no front derailleur to hold them in place. But don't you think a plastic retention cage would both work better and be lighter? Or just taller teeth on the chainring. Clearly I don't understand how the magnet idea would work. My first impression is that it would really exaggerate any chain suck, which is a bad thing. I mean, how is the chain supposed to know "/here/ I'm supposed to work with the magnet and stay on the ring, but /there/ I should roll neatly off the ring and ignore the magnet?" Mark J. |
#5
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and the answer is... Magnets!
On Sun, 12 Jan 2020 15:56:47 -0800, "Mark J."
wrote: On 1/12/2020 3:28 PM, Tim McNamara wrote: On Fri, 10 Jan 2020 10:31:40 -0800 (PST), wrote: On Friday, January 10, 2020 at 10:14:09 AM UTC-8, AMuzi wrote: https://bikerumor.com/2020/01/06/pat...don-wave-tech/ -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 Doesn't it seem sort of silly that you would drill a million holes in a chainring to make them as light as possible and then stick steel magnets on them? On 1 x's I suppose the problem is going to be chain retention what with very wide rear cog ratios nd no front derailleur to hold them in place. But don't you think a plastic retention cage would both work better and be lighter? Or just taller teeth on the chainring. Clearly I don't understand how the magnet idea would work. My first impression is that it would really exaggerate any chain suck, which is a bad thing. I mean, how is the chain supposed to know "/here/ I'm supposed to work with the magnet and stay on the ring, but /there/ I should roll neatly off the ring and ignore the magnet?" Mark J. I suppose that as a chain link reached the bottom of the sprocket the magnet would in essence move away from the link and thus the magnetic attraction would lessen. On the other hand I have read that a substantial part of the cost of making a cellular phone, as much as 30%, is the payment of patent fees to other companies that hold these patents. Perhaps the "magnetic sprocket" is simply an effort to patent everything in sight and thus (perhaps) inflate the value of one's company. -- cheers, John B. |
#6
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and the answer is... Magnets!
On Sunday, 12 January 2020 19:30:04 UTC-5, John B. wrote:
On Sun, 12 Jan 2020 15:56:47 -0800, "Mark J." wrote: On 1/12/2020 3:28 PM, Tim McNamara wrote: On Fri, 10 Jan 2020 10:31:40 -0800 (PST), wrote: On Friday, January 10, 2020 at 10:14:09 AM UTC-8, AMuzi wrote: https://bikerumor.com/2020/01/06/pat...don-wave-tech/ -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 Doesn't it seem sort of silly that you would drill a million holes in a chainring to make them as light as possible and then stick steel magnets on them? On 1 x's I suppose the problem is going to be chain retention what with very wide rear cog ratios nd no front derailleur to hold them in place. But don't you think a plastic retention cage would both work better and be lighter? Or just taller teeth on the chainring. Clearly I don't understand how the magnet idea would work. My first impression is that it would really exaggerate any chain suck, which is a bad thing. I mean, how is the chain supposed to know "/here/ I'm supposed to work with the magnet and stay on the ring, but /there/ I should roll neatly off the ring and ignore the magnet?" Mark J. I suppose that as a chain link reached the bottom of the sprocket the magnet would in essence move away from the link and thus the magnetic attraction would lessen. On the other hand I have read that a substantial part of the cost of making a cellular phone, as much as 30%, is the payment of patent fees to other companies that hold these patents. Perhaps the "magnetic sprocket" is simply an effort to patent everything in sight and thus (perhaps) inflate the value of one's company. -- cheers, John B. I wonder how long it'd take for the chain itself to become slightly magnetized - enough to hold all that fine grit as the chain wears thereby hastening chain and chainring and sprocket wear? Cheers |
#7
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and the answer is... Magnets!
On Sun, 12 Jan 2020 18:46:08 -0800 (PST), Sir Ridesalot
wrote: On Sunday, 12 January 2020 19:30:04 UTC-5, John B. wrote: On Sun, 12 Jan 2020 15:56:47 -0800, "Mark J." wrote: On 1/12/2020 3:28 PM, Tim McNamara wrote: On Fri, 10 Jan 2020 10:31:40 -0800 (PST), wrote: On Friday, January 10, 2020 at 10:14:09 AM UTC-8, AMuzi wrote: https://bikerumor.com/2020/01/06/pat...don-wave-tech/ -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 Doesn't it seem sort of silly that you would drill a million holes in a chainring to make them as light as possible and then stick steel magnets on them? On 1 x's I suppose the problem is going to be chain retention what with very wide rear cog ratios nd no front derailleur to hold them in place. But don't you think a plastic retention cage would both work better and be lighter? Or just taller teeth on the chainring. Clearly I don't understand how the magnet idea would work. My first impression is that it would really exaggerate any chain suck, which is a bad thing. I mean, how is the chain supposed to know "/here/ I'm supposed to work with the magnet and stay on the ring, but /there/ I should roll neatly off the ring and ignore the magnet?" Mark J. I suppose that as a chain link reached the bottom of the sprocket the magnet would in essence move away from the link and thus the magnetic attraction would lessen. On the other hand I have read that a substantial part of the cost of making a cellular phone, as much as 30%, is the payment of patent fees to other companies that hold these patents. Perhaps the "magnetic sprocket" is simply an effort to patent everything in sight and thus (perhaps) inflate the value of one's company. -- cheers, John B. I wonder how long it'd take for the chain itself to become slightly magnetized - enough to hold all that fine grit as the chain wears thereby hastening chain and chainring and sprocket wear? Cheers Which, of course, adds to the GDP, a tiny bit, which I am told is a good thing. :-) -- cheers, John B. |
#8
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and the answer is... Magnets!
On Sunday, January 12, 2020 at 3:28:46 PM UTC-8, Tim McNamara wrote:
On Fri, 10 Jan 2020 10:31:40 -0800 (PST), wrote: On Friday, January 10, 2020 at 10:14:09 AM UTC-8, AMuzi wrote: https://bikerumor.com/2020/01/06/pat...don-wave-tech/ -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 Doesn't it seem sort of silly that you would drill a million holes in a chainring to make them as light as possible and then stick steel magnets on them? On 1 x's I suppose the problem is going to be chain retention what with very wide rear cog ratios nd no front derailleur to hold them in place. But don't you think a plastic retention cage would both work better and be lighter? Or just taller teeth on the chainring. One of the latest improvements by Shimano on their GPX is some sort of hydraulic damping on their rear derailleur to keep the chain from hopping off under bumps. So this much be more of a problems than I've had. I simply pulled a link out of the chain to pull the chain tighter against the RD spring. |
#9
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and the answer is... Magnets!
On Monday, January 13, 2020 at 1:44:04 PM UTC-8, wrote:
On Sunday, January 12, 2020 at 3:28:46 PM UTC-8, Tim McNamara wrote: On Fri, 10 Jan 2020 10:31:40 -0800 (PST), wrote: On Friday, January 10, 2020 at 10:14:09 AM UTC-8, AMuzi wrote: https://bikerumor.com/2020/01/06/pat...don-wave-tech/ -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 Doesn't it seem sort of silly that you would drill a million holes in a chainring to make them as light as possible and then stick steel magnets on them? On 1 x's I suppose the problem is going to be chain retention what with very wide rear cog ratios nd no front derailleur to hold them in place. But don't you think a plastic retention cage would both work better and be lighter? Or just taller teeth on the chainring. One of the latest improvements by Shimano on their GPX is some sort of hydraulic damping on their rear derailleur to keep the chain from hopping off under bumps. So this much be more of a problems than I've had. I simply pulled a link out of the chain to pull the chain tighter against the RD spring. It's called a clutch. It's older mountain bike technology made new again in the GPX/Ultegra group. -- Jay Beattie. |
#10
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and the answer is... Magnets!
Am 10.01.2020 um 19:14 schrieb AMuzi:
https://bikerumor.com/2020/01/06/pat...don-wave-tech/ The answer was "Magnets" also in a FIRSTLegoLeague research by some 12 and 9-year old kids last weekend. Their question was "How can I design a swing that my friend in a wheel chair can operate on her own?". Back on topic: my kids compared various routes in the city center with Strava https://www.strava.com/athletes/rosapanther (how many people go on the main road, how many take a parallel road on the right, how many on the left? What's the delay of crossing the main road with pedestrian traffic lights?). |
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