|
|
Thread Tools | Display Modes |
#131
|
|||
|
|||
SIX thousand and FIVE hundred lumens !!!!!!!!!!
Jeff Liebermann wrote:
Nice. There's another difference. He had years of experience, while you seem to be limiting yourself to what you can learn from a garage full of old bicycles and parts. Is it that obvious? *blushes* But actually, I work every night several hours to elevate my game and take it to the next level! I'll post a couple of photos tomorrow, God willing. That works, to a point, but I think you will do much better either working for someone else in order to learn the trade That'd be nice but 1) there is absolutely no money in this; 2) I love to work at night, I'm an owl from my programming days, I peak at ~03:00/3:00 AM; 3) tho I love bikes, I love to repair one per day or so, not 10 or God knows how many they do in an 8h work day; and 4) I'm a perfectionist. When I repair a bike, I aim for 100% perfection. And sometimes I get close! What I don't care for is when people come with a dirty bike, with the hand brake broke, the saddle has a hole in it, but they only want to have the flat tire fixed. Then I say, "I'll fix your ENTIRE bike, OK?" Sometimes they accept this and are very pleased by the result - without boasting - but most often they take it to a professional shop which is fine by me. So no, I'm not going pro on this, ever. or working on a better class of bicycle. Now I have two such bikes myself, one Scott Scale 960 alu-MTB, one Merckx emx-1 carbon racer, so I have some understanding. But people who own such bikes don't come to the organization and for help. They have money. Unless they are bums and the stuff is stolen. -- underground experts united http://user.it.uu.se/~embe8573 |
Ads |
#132
|
|||
|
|||
SIX thousand and FIVE hundred lumens !!!!!!!!!!
On 10/8/2018 12:24 PM, Jeff Liebermann wrote:
snip Anyway, I would be quite satisfied if Emanuel Berg were to build something resembling a bicycle light from scratch, measures the lumens, lux, candelas, beam pattern, variation in intensity across the beam pattern, power draw, operating temperature, and then improves the design updating the measurements as he makes changes. What are really nice for a homebrew system are the MR16 LED lamps because they have an integrated thermal solution and are available in many different beam patterns. The beam pattern of a two lamp MR16 system is close to ideal, with sufficient spread to illuminate street signs, while not blinding on coming traffic. There used to be commercially available MR11 and MR16 dual beam systems but there was overhead involved in using those lamps which made them larger and heavier than what can be achieved now. They also require too many cells to achieve the proper voltage. You can run them with 3 or 4 Li-Ion cells in series for 11.1V or 14.8V. |
#133
|
|||
|
|||
SIX thousand and FIVE hundred lumens !!!!!!!!!!
On Mon, 08 Oct 2018 11:06:53 -0700, Joerg
wrote: On 2018-10-07 17:08, John B. Slocomb wrote: On Sun, 7 Oct 2018 15:02:19 -0400, Frank Krygowski wrote: On 10/6/2018 2:49 PM, Joerg wrote: [...] 2. It causes oncoming motorists to see the cyclist much earlier and, for example, if a big semi comes they can pull a bit to the right so the semi can give the cyclist wide berth. I do NOT believe any practical light allows a motorist to see a cyclist _much_ earlier. In almost every case, I've seen on-road cyclists before I noticed that they had a light. And in no case did I see the light early enough to make any practical difference. You're fixating on a superstitious talisman, imagining benefits that don't exist in real life. I think I've mentioned seeing the bloke on a bike wearing bright orange knee socks nearly a kilometer away :-) I remember the orange socks but can't remember whether he had a light on his bike or not :-) I wonder what the reaction would be if said bloke participated in a business meeting wearing bright orange knee socks. The subject was bicycle visibility, not business meetings.... but having said that I might comment that it is not difficult to change socks, even sitting on the roadside curb. -- Cheers John B. |
#134
|
|||
|
|||
SIX thousand and FIVE hundred lumens !!!!!!!!!!
On 2018-10-08 16:05, John B. Slocomb wrote:
On Mon, 08 Oct 2018 11:06:53 -0700, Joerg wrote: On 2018-10-07 17:08, John B. Slocomb wrote: On Sun, 7 Oct 2018 15:02:19 -0400, Frank Krygowski wrote: On 10/6/2018 2:49 PM, Joerg wrote: [...] 2. It causes oncoming motorists to see the cyclist much earlier and, for example, if a big semi comes they can pull a bit to the right so the semi can give the cyclist wide berth. I do NOT believe any practical light allows a motorist to see a cyclist _much_ earlier. In almost every case, I've seen on-road cyclists before I noticed that they had a light. And in no case did I see the light early enough to make any practical difference. You're fixating on a superstitious talisman, imagining benefits that don't exist in real life. I think I've mentioned seeing the bloke on a bike wearing bright orange knee socks nearly a kilometer away :-) I remember the orange socks but can't remember whether he had a light on his bike or not :-) I wonder what the reaction would be if said bloke participated in a business meeting wearing bright orange knee socks. The subject was bicycle visibility, not business meetings.... To me a bicycle is not just a piece of sports equipment but foremost a transport vehicle. ... but having said that I might comment that it is not difficult to change socks, even sitting on the roadside curb. And change all the other things sitting on a curb in a business park? I rather flick a little switch and have instant visibility. Upon arrival I flick it again, visibility turns off. Simple. -- Regards, Joerg http://www.analogconsultants.com/ |
#135
|
|||
|
|||
SIX thousand and FIVE hundred lumens !!!!!!!!!!
On Monday, October 8, 2018 at 4:16:43 PM UTC-7, Joerg wrote:
On 2018-10-08 16:05, John B. Slocomb wrote: On Mon, 08 Oct 2018 11:06:53 -0700, Joerg wrote: On 2018-10-07 17:08, John B. Slocomb wrote: On Sun, 7 Oct 2018 15:02:19 -0400, Frank Krygowski wrote: On 10/6/2018 2:49 PM, Joerg wrote: [...] 2. It causes oncoming motorists to see the cyclist much earlier and, for example, if a big semi comes they can pull a bit to the right so the semi can give the cyclist wide berth. I do NOT believe any practical light allows a motorist to see a cyclist _much_ earlier. In almost every case, I've seen on-road cyclists before I noticed that they had a light. And in no case did I see the light early enough to make any practical difference. You're fixating on a superstitious talisman, imagining benefits that don't exist in real life. I think I've mentioned seeing the bloke on a bike wearing bright orange knee socks nearly a kilometer away :-) I remember the orange socks but can't remember whether he had a light on his bike or not :-) I wonder what the reaction would be if said bloke participated in a business meeting wearing bright orange knee socks. The subject was bicycle visibility, not business meetings.... To me a bicycle is not just a piece of sports equipment but foremost a transport vehicle. Wow, that's poignant. I've been commuting to school or work for 50 years and changing my clothes for the last 40. Even when I was a substitute teacher, I would ride to school with a backpack and change when I got there. There is always some place to change. I certainly wouldn't go to a client meeting in rain drenched or sweat drenched shirt -- or in shorts. Do you go to client meetings in t-shirts and shorts? ... but having said that I might comment that it is not difficult to change socks, even sitting on the roadside curb. And change all the other things sitting on a curb in a business park? I rather flick a little switch and have instant visibility. Upon arrival I flick it again, visibility turns off. Simple. Do you have a side light? I'd worry about that. Pull though an intersection and "whack." Where was your side light! You really should have a bright side light. -- Jay Beattie. |
#136
|
|||
|
|||
SIX thousand and FIVE hundred lumens !!!!!!!!!!
On Mon, 08 Oct 2018 16:16:43 -0700, Joerg
wrote: On 2018-10-08 16:05, John B. Slocomb wrote: On Mon, 08 Oct 2018 11:06:53 -0700, Joerg wrote: On 2018-10-07 17:08, John B. Slocomb wrote: On Sun, 7 Oct 2018 15:02:19 -0400, Frank Krygowski wrote: On 10/6/2018 2:49 PM, Joerg wrote: [...] 2. It causes oncoming motorists to see the cyclist much earlier and, for example, if a big semi comes they can pull a bit to the right so the semi can give the cyclist wide berth. I do NOT believe any practical light allows a motorist to see a cyclist _much_ earlier. In almost every case, I've seen on-road cyclists before I noticed that they had a light. And in no case did I see the light early enough to make any practical difference. You're fixating on a superstitious talisman, imagining benefits that don't exist in real life. I think I've mentioned seeing the bloke on a bike wearing bright orange knee socks nearly a kilometer away :-) I remember the orange socks but can't remember whether he had a light on his bike or not :-) I wonder what the reaction would be if said bloke participated in a business meeting wearing bright orange knee socks. The subject was bicycle visibility, not business meetings.... To me a bicycle is not just a piece of sports equipment but foremost a transport vehicle. ... but having said that I might comment that it is not difficult to change socks, even sitting on the roadside curb. And change all the other things sitting on a curb in a business park? I rather flick a little switch and have instant visibility. Upon arrival I flick it again, visibility turns off. Simple. As I said, I noticed the orange socks going up and down a kilometer away on a bright summer day. I doubt strongly whether your super-duper light would even be visible (in bright daylight) at that distance. -- Cheers John B. |
#137
|
|||
|
|||
SIX thousand and FIVE hundred lumens !!!!!!!!!!
On Mon, 8 Oct 2018 16:55:59 -0700 (PDT), jbeattie
wrote: On Monday, October 8, 2018 at 4:16:43 PM UTC-7, Joerg wrote: On 2018-10-08 16:05, John B. Slocomb wrote: On Mon, 08 Oct 2018 11:06:53 -0700, Joerg wrote: On 2018-10-07 17:08, John B. Slocomb wrote: On Sun, 7 Oct 2018 15:02:19 -0400, Frank Krygowski wrote: On 10/6/2018 2:49 PM, Joerg wrote: [...] 2. It causes oncoming motorists to see the cyclist much earlier and, for example, if a big semi comes they can pull a bit to the right so the semi can give the cyclist wide berth. I do NOT believe any practical light allows a motorist to see a cyclist _much_ earlier. In almost every case, I've seen on-road cyclists before I noticed that they had a light. And in no case did I see the light early enough to make any practical difference. You're fixating on a superstitious talisman, imagining benefits that don't exist in real life. I think I've mentioned seeing the bloke on a bike wearing bright orange knee socks nearly a kilometer away :-) I remember the orange socks but can't remember whether he had a light on his bike or not :-) I wonder what the reaction would be if said bloke participated in a business meeting wearing bright orange knee socks. The subject was bicycle visibility, not business meetings.... To me a bicycle is not just a piece of sports equipment but foremost a transport vehicle. Wow, that's poignant. I've been commuting to school or work for 50 years and changing my clothes for the last 40. Even when I was a substitute teacher, I would ride to school with a backpack and change when I got there. There is always some place to change. I certainly wouldn't go to a client meeting in rain drenched or sweat drenched shirt -- or in shorts. Do you go to client meetings in t-shirts and shorts? ... but having said that I might comment that it is not difficult to change socks, even sitting on the roadside curb. And change all the other things sitting on a curb in a business park? I rather flick a little switch and have instant visibility. Upon arrival I flick it again, visibility turns off. Simple. Do you have a side light? I'd worry about that. Pull though an intersection and "whack." Where was your side light! You really should have a bright side light. -- Jay Beattie. There is also a great danger from large birds. One really should have an upward shining helmet lamp. I'm a bit ambivalent about snakes, my present thoughts that one is probably safe from snake bite in a metropolitan neighborhood. -- Cheers John B. |
#138
|
|||
|
|||
SIX thousand and FIVE hundred lumens !!!!!!!!!!
On 10/7/2018 8:36 PM, jbeattie wrote:
Pah-lease! No homicidal riff-raff was wearing my super-fine, hi-viz, four-way stretch water resistant, race fit Castelli Gabba jacket... OT, but: The term "four-way stretch" has always irritated me. The stuff is two dimensional! Are they claiming it also stretches across its thickness? Plus there are only three spatial dimensions. Are they going Einsteinian and claiming the fourth direction is time? So I looked it up. Turns out if it stretches from left to right, they consider that "two-way stretch." Was that supposed to be a big improvement on fabrics that stretched if you pulled them to the right, but not if you pulled to the left? No, it was clearly just one way - but they said that since it returned to its original width when you let go, it counted as two ways. If it does it up and down and side to side, they count it as four ways. What nonsense! I guess I should be glad rope manufacturers don't take this up. "Our working strength is _twice_ as great as our competitors! (Because our rope can withstand that force if you pull up OR pull down!)" -- - Frank Krygowski |
#139
|
|||
|
|||
SIX thousand and FIVE hundred lumens !!!!!!!!!!
On 10/7/2018 11:37 PM, sms wrote:
A long time ago, one poster here was insisting that one reason LED lights were so wonderful was the lack of a "white-hot filament." Nothing like resurrecting an old debate, but rephrasing it in your own straw-man terms, Scharf. -- - Frank Krygowski |
#140
|
|||
|
|||
SIX thousand and FIVE hundred lumens !!!!!!!!!!
On 10/8/2018 7:55 PM, jbeattie wrote:
On Monday, October 8, 2018 at 4:16:43 PM UTC-7, Joerg wrote: On 2018-10-08 16:05, John B. Slocomb wrote: On Mon, 08 Oct 2018 11:06:53 -0700, Joerg wrote: On 2018-10-07 17:08, John B. Slocomb wrote: On Sun, 7 Oct 2018 15:02:19 -0400, Frank Krygowski wrote: On 10/6/2018 2:49 PM, Joerg wrote: [...] 2. It causes oncoming motorists to see the cyclist much earlier and, for example, if a big semi comes they can pull a bit to the right so the semi can give the cyclist wide berth. I do NOT believe any practical light allows a motorist to see a cyclist _much_ earlier. In almost every case, I've seen on-road cyclists before I noticed that they had a light. And in no case did I see the light early enough to make any practical difference. You're fixating on a superstitious talisman, imagining benefits that don't exist in real life. I think I've mentioned seeing the bloke on a bike wearing bright orange knee socks nearly a kilometer away :-) I remember the orange socks but can't remember whether he had a light on his bike or not :-) I wonder what the reaction would be if said bloke participated in a business meeting wearing bright orange knee socks. The subject was bicycle visibility, not business meetings.... To me a bicycle is not just a piece of sports equipment but foremost a transport vehicle. Wow, that's poignant. I've been commuting to school or work for 50 years and changing my clothes for the last 40. Even when I was a substitute teacher, I would ride to school with a backpack and change when I got there. There is always some place to change. I certainly wouldn't go to a client meeting in rain drenched or sweat drenched shirt -- or in shorts. Do you go to client meetings in t-shirts and shorts? I bike commuted for over 30 years (admittedly, not every day) wearing the same business casual clothes I wore during the work day. I wasn't super-fast, but the seven mile trip between home and the last job took me less than half an hour, traffic lights and all. I took it easy on the (downhill) way to work, and usually time trialed on the way home. My clothes were sweaty when I got home, but they could go in the laundry. -- - Frank Krygowski |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Oculus reaches 3000 lumens | Barry Beams | Techniques | 8 | August 22nd 17 04:21 AM |
How to easily measure lumens | Jeff Liebermann | Techniques | 23 | March 26th 17 10:31 PM |
bye, bye postie, another few thousand less bikes! | Mrcheerful[_2_] | UK | 4 | July 29th 10 10:29 PM |
Worth a thousand words ....probably more | DirtRoadie | Racing | 8 | July 28th 09 07:57 PM |
day fifteen thousand and something | Triball | Unicycling | 0 | October 13th 07 04:27 PM |