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#51
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Eyc headlight problem
sms wrote:
On 3/31/2021 6:49 PM, Ralph Barone wrote: sms wrote: snip I don't know whatever happened to the plans for 12V hub dynamos. There are 12V bottle dynamos, but for whatever reason 12V hub dynamos never were marketed http://www.velovision.com/ftp-admin/VVArchive/www.velovisionmag.co.uk/showStory37a0.html?storynum=56. Come on now, Steven, dust off your EE textbooks. A typical hub dynamo transmits 3 Watts of power over a distance of maybe 3 feet. If you wanted to double, triple or even transmit 10 times as much power, you don’t need to change the voltage, just change the internal design of the dynamo. The obvious solution would be a 3 phase AC generator, with a rectifier/buck converter inside that puts out a constant 6 V with a much higher current limit. Now, inside the dynamo, there may be arguments to be made for a higher internal voltage before the regulator, but a 6V output should be good up to the point where nobody would buy one because it would sap too much energy from the rider. A hybrid design would be ideal. Regenerative braking on downhill to charge the battery but running on the battery alone when going uphill. With speed sensors, level sensors, and torque sensors, a hybrid bicycle light might rarely require recharging from the mains, especially because during daytime riding the battery drain would be limited to the small amount of power used by a DRL. Regenerative braking sounds great, but practically speaking, what percentage of your life do you actually spend braking on downhill segments? |
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#52
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Eyc headlight problem
On 4/1/2021 11:25 AM, Rolf Mantel wrote:
Am 01.04.2021 um 18:03 schrieb jbeattie: Most people who commute don't spend that much time riding in the dark and aren't willing to make the effort to get a dyno, although that demographic would be best served since most riding is in facilities and on streets. Yes, you southerners (the 49th latitude is some 50 miles south of here) don't have winters where the sun goes down before the kids come home from school. Round here, in southern Germany, there are three months where you might be able to chose whether you prefer a dark morning commute or a dark evening commute (and take 2 weeks of vacation after christmas if you wish to see the sun at all). +1 (from 43 something North) -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 |
#53
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Eyc headlight problem
On Thursday, April 1, 2021 at 10:59:48 AM UTC-5, Frank Krygowski wrote:
I think a lot of skepticism of dyno systems is due to "safety inflation." Whatever was good enough last year _must_ be dangerous this year, because there's something that claims to be "better." It applies to riding without protective headgear, sliding our feet into toe clips, removing our hands from the brake levers to shift gears, riding in daylight with no lights, riding our bikes on roads that don't have walls between cars and bikes, and much more. It amounts to retroactively imagining past dangers we were never aware of. -- - Frank Krygowski Responding only to the toe clips comments. I vaguely remember riding with toe clips back in the 1980s. It was 30 years ago. I had Alfredo Binda toe straps. I got my first set of Time clipless pedals in the early 1990s. I was delighted to retire the toe clips and never ever use them again. Clipless for me. SPD or SPD-SL on all my bikes. I've had bikes with stem mounted levers, downtube levers, bar end levers, STI, and Ergo. I'll rate STI and Ergo as a tie. Both are vastly superior to the others. I'm not going back. |
#54
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Eyc headlight problem
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#55
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Eyc headlight problem
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#56
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Eyc headlight problem
On Thursday, April 1, 2021 at 3:56:59 PM UTC-7, Frank Krygowski wrote:
On 4/1/2021 5:41 PM, wrote: On Thursday, April 1, 2021 at 10:59:48 AM UTC-5, Frank Krygowski wrote: I think a lot of skepticism of dyno systems is due to "safety inflation." Whatever was good enough last year _must_ be dangerous this year, because there's something that claims to be "better." It applies to riding without protective headgear, sliding our feet into toe clips, removing our hands from the brake levers to shift gears, riding in daylight with no lights, riding our bikes on roads that don't have walls between cars and bikes, and much more. It amounts to retroactively imagining past dangers we were never aware of. -- - Frank Krygowski Responding only to the toe clips comments. I vaguely remember riding with toe clips back in the 1980s. It was 30 years ago. I had Alfredo Binda toe straps. I got my first set of Time clipless pedals in the early 1990s. I was delighted to retire the toe clips and never ever use them again. Clipless for me. SPD or SPD-SL on all my bikes. I've had bikes with stem mounted levers, downtube levers, bar end levers, STI, and Ergo. I'll rate STI and Ergo as a tie. Both are vastly superior to the others. I'm not going back. Preference is one thing. My point with the list I gave is that all of those items have been touted, at least by some, as either necessary or highly desirable for "safety" purposes. Yes, all modern improvements are the result of irrational fear. Take the toilet -- and computers for example. Nobody in my cohort ever touted STI or step in pedal systems as a safety improvement. And in bike shops, they were sold as conveniences -- or performance enhancers. STI was the secret weapon! Click and sprint! Dyno hubs and lights are for the Radio Shack set. Dim light but lots of it, like the hand-squeeze flashlights. Most people would rather spend one-fifth as much money and get twice the light at one-quarter the weight for the hour or so it takes them to get home during the winter months. That makes perfect sense. It's not safety inflation. Just look at the Costco flashlight ads: "it lights up a whole room!" OTOH, super-bright flashers are safety inflation or perhaps irrational fear -- or maybe even rational fear, who knows. I got a bright pulsing rear flasher because I felt imperiled on parts of my commute, and I put reflective tape on my fenders. I do want to be seen at night -- and I have some great reflective booties that are real attention getters. A super-bright front flasher, however, has serious negative impacts when used indiscriminately. And we live in odd times. Despite this being the safest era that ever existed, society is ever more fearful of "danger." It leads to all sorts of weird behavior - prohibiting kids playing away from adult supervision, requiring protective gear for safe and normal activities, living in communities with guards at the gate, buying guns for "protection," etc. It makes people suckers for anything the promises "safety," including bike equipment that solves safety problems that never existed. Like? A helmet? I look at my bike and see no safety improvements except for maybe wider tires. My current bikes are really no more or less safe than my bikes 50 years ago. They are more fun to ride, though. Yes, I love STI. I was riding last night, out of the saddle, clicking away merrily as I ascended the endless hills on my pre-dinner loop. F*** DT shifting. And simultaneously, we glorify risk taking through TV shows, movies, video games, YouTube videos and more. Skateboarders, snowboarders, mountain bikers and BMXers go for "big air." Skydivers, BASE jumpers drift drivers are heroes. Some day I'm going to be famous on YouTube for moving my hands away from my brakes to shift. Mmmm. No. -- Jay Beattie. |
#57
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Eyc headlight problem
On 4/1/2021 4:45 PM, jbeattie wrote:
snip OTOH, super-bright flashers are safety inflation or perhaps irrational fear -- or maybe even rational fear, who knows. I got a bright pulsing rear flasher because I felt imperiled on parts of my commute, and I put reflective tape on my fenders. I do want to be seen at night -- and I have some great reflective booties that are real attention getters. A super-bright front flasher, however, has serious negative impacts when used indiscriminately. I wish that more lights didn't use the brightest setting for the DRL flasher, and that instead of a "flash" they used a breathe mode (which is similar to modulated motorcycle headlights). I really like this light https://www.aliexpress.com/item/32802747811.html with the "breathe" mode between 50 lumens and 100 lumens. You get the benefit of a DRL without annoying oncoming cyclists. Like? A helmet? I look at my bike and see no safety improvements except for maybe wider tires. My current bikes are really no more or less safe than my bikes 50 years ago. They are more fun to ride, though. Yes, I love STI. I was riding last night, out of the saddle, clicking away merrily as I ascended the endless hills on my pre-dinner loop. F*** DT shifting. Braking systems are much better. Retention tabs on forks, shifters where you don't have to remove your hands from the handlebars, better tires, better lighting, better helmets. |
#58
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Eyc headlight problem
On Thursday, April 1, 2021 at 7:45:49 p.m. UTC-4, jbeattie wrote:
On Thursday, April 1, 2021 at 3:56:59 PM UTC-7, Frank Krygowski wrote: On 4/1/2021 5:41 PM, wrote: On Thursday, April 1, 2021 at 10:59:48 AM UTC-5, Frank Krygowski wrote: I think a lot of skepticism of dyno systems is due to "safety inflation." Whatever was good enough last year _must_ be dangerous this year, because there's something that claims to be "better." It applies to riding without protective headgear, sliding our feet into toe clips, removing our hands from the brake levers to shift gears, riding in daylight with no lights, riding our bikes on roads that don't have walls between cars and bikes, and much more. It amounts to retroactively imagining past dangers we were never aware of. -- - Frank Krygowski Responding only to the toe clips comments. I vaguely remember riding with toe clips back in the 1980s. It was 30 years ago. I had Alfredo Binda toe straps. I got my first set of Time clipless pedals in the early 1990s. I was delighted to retire the toe clips and never ever use them again. Clipless for me. SPD or SPD-SL on all my bikes. I've had bikes with stem mounted levers, downtube levers, bar end levers, STI, and Ergo. I'll rate STI and Ergo as a tie. Both are vastly superior to the others. I'm not going back. Preference is one thing. My point with the list I gave is that all of those items have been touted, at least by some, as either necessary or highly desirable for "safety" purposes. Yes, all modern improvements are the result of irrational fear. Take the toilet -- and computers for example. Nobody in my cohort ever touted STI or step in pedal systems as a safety improvement. And in bike shops, they were sold as conveniences -- or performance enhancers. STI was the secret weapon! Click and sprint! Dyno hubs and lights are for the Radio Shack set. Dim light but lots of it, like the hand-squeeze flashlights. Most people would rather spend one-fifth as much money and get twice the light at one-quarter the weight for the hour or so it takes them to get home during the winter months. That makes perfect sense. It's not safety inflation. Just look at the Costco flashlight ads: "it lights up a whole room!" OTOH, super-bright flashers are safety inflation or perhaps irrational fear -- or maybe even rational fear, who knows. I got a bright pulsing rear flasher because I felt imperiled on parts of my commute, and I put reflective tape on my fenders. I do want to be seen at night -- and I have some great reflective booties that are real attention getters. A super-bright front flasher, however, has serious negative impacts when used indiscriminately. And we live in odd times. Despite this being the safest era that ever existed, society is ever more fearful of "danger." It leads to all sorts of weird behavior - prohibiting kids playing away from adult supervision, requiring protective gear for safe and normal activities, living in communities with guards at the gate, buying guns for "protection," etc. It makes people suckers for anything the promises "safety," including bike equipment that solves safety problems that never existed. Like? A helmet? I look at my bike and see no safety improvements except for maybe wider tires. My current bikes are really no more or less safe than my bikes 50 years ago. They are more fun to ride, though. Yes, I love STI. I was riding last night, out of the saddle, clicking away merrily as I ascended the endless hills on my pre-dinner loop. F*** DT shifting. And simultaneously, we glorify risk taking through TV shows, movies, video games, YouTube videos and more. Skateboarders, snowboarders, mountain bikers and BMXers go for "big air." Skydivers, BASE jumpers drift drivers are heroes. Some day I'm going to be famous on YouTube for moving my hands away from my brakes to shift. Mmmm. No. -- Jay Beattie. Back in 2001 I put Campagnolo 9-speed Mirage Ergo levers on my touring bike.. I love the fact that I can make a shift whilst struggling up a long or steep hill whilst battling a strong gusty head or side wind. I find that because of the convenience of those Ergo levers that I shift a lot more often which makes a long ride far less fatiguing since I can easily shift into a more efficient gear. Cheers |
#59
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Eyc headlight problem
On Thursday, April 1, 2021 at 8:54:48 p.m. UTC-4, sms wrote:
On 4/1/2021 4:45 PM, jbeattie wrote: snip OTOH, super-bright flashers are safety inflation or perhaps irrational fear -- or maybe even rational fear, who knows. I got a bright pulsing rear flasher because I felt imperiled on parts of my commute, and I put reflective tape on my fenders. I do want to be seen at night -- and I have some great reflective booties that are real attention getters. A super-bright front flasher, however, has serious negative impacts when used indiscriminately.. I wish that more lights didn't use the brightest setting for the DRL flasher, and that instead of a "flash" they used a breathe mode (which is similar to modulated motorcycle headlights). I really like this light https://www.aliexpress.com/item/32802747811.html with the "breathe" mode between 50 lumens and 100 lumens. You get the benefit of a DRL without annoying oncoming cyclists. Like? A helmet? I look at my bike and see no safety improvements except for maybe wider tires. My current bikes are really no more or less safe than my bikes 50 years ago. They are more fun to ride, though. Yes, I love STI. I was riding last night, out of the saddle, clicking away merrily as I ascended the endless hills on my pre-dinner loop. F*** DT shifting. Braking systems are much better. Retention tabs on forks, shifters where you don't have to remove your hands from the handlebars, better tires, better lighting, better helmets. I like how in one paragraph is says, "the running time can be 9 hrs with middle luminance" and a bit further down the page it is says, "the running time can be 4 hours and 48 minutes on middle luminance". Cheers |
#60
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Eyc headlight problem
On 4/1/2021 8:58 PM, Sir Ridesalot wrote:
On Thursday, April 1, 2021 at 8:54:48 p.m. UTC-4, sms wrote: On 4/1/2021 4:45 PM, jbeattie wrote: snip OTOH, super-bright flashers are safety inflation or perhaps irrational fear -- or maybe even rational fear, who knows. I got a bright pulsing rear flasher because I felt imperiled on parts of my commute, and I put reflective tape on my fenders. I do want to be seen at night -- and I have some great reflective booties that are real attention getters. A super-bright front flasher, however, has serious negative impacts when used indiscriminately. I wish that more lights didn't use the brightest setting for the DRL flasher, and that instead of a "flash" they used a breathe mode (which is similar to modulated motorcycle headlights). I really like this light https://www.aliexpress.com/item/32802747811.html with the "breathe" mode between 50 lumens and 100 lumens. You get the benefit of a DRL without annoying oncoming cyclists. Like? A helmet? I look at my bike and see no safety improvements except for maybe wider tires. My current bikes are really no more or less safe than my bikes 50 years ago. They are more fun to ride, though. Yes, I love STI. I was riding last night, out of the saddle, clicking away merrily as I ascended the endless hills on my pre-dinner loop. F*** DT shifting. Braking systems are much better. Retention tabs on forks, shifters where you don't have to remove your hands from the handlebars, better tires, better lighting, better helmets. I like how in one paragraph is says, "the running time can be 9 hrs with middle luminance" and a bit further down the page it is says, "the running time can be 4 hours and 48 minutes on middle luminance". Cheers As is often noted, "If not for double standards, we'd have no standards at all.' -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 |
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