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#51
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The last headlight you will ever need
On Fri, 28 Mar 2014 08:05:20 +1100, James
wrote: On 28/03/14 03:00, Phil W Lee wrote: John B. considered Thu, 27 Mar 2014 18:51:03 +0700 the perfect time to write: On Wed, 26 Mar 2014 21:52:24 -0700, Jeff Liebermann wrote: On Wed, 26 Mar 2014 21:47:16 -0700, Jeff Liebermann wrote: 600 watts: http://www.econvergence.net/The-Pedal-A-Watt-Bicycle-Generator-Stand-s/1820.htm See bottom of page for the "400 watt grid intertie inverter". Sigh. 300 watts: http://www.pedalpowergenerator.com But can you do it for 8 hours a day, day in and day out? I really need to power some tools on the boat I'm working on which is anchored out in the harbour. You should be able to power a reasonably respectable car alternator with even a fairly modest wind turbine, which would seem ideally suited to use on a boat. That'll keep a decent 12v battery charged for either direct use, or through an inverter if you need utility voltage for your tools. I can't say that I remember using any power tools on boats when I used to help out down at the yard in Brnham-on-Crouch though. Car alternators are designed to be turned at relatively high speed compared with a windmill. The only option is to gear the windmill so that it turns the alternator at much higher speed - but then efficiency suffers as power lost in the gears. There are better solutions. And, the car alternator needs to be excited by an external power course to produce electricity - the reason that they aren't used to build wind generators :-) -- Cheers, John B. |
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#52
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The last headlight you will ever need
John B. wrote:
On Thu, 27 Mar 2014 08:29:42 -0400, Duane wrote: On 3/27/2014 7:46 AM, John B. wrote: On Thu, 27 Mar 2014 15:31:25 +1100, James wrote: On 27/03/14 11:56, John B. wrote: On Wed, 26 Mar 2014 13:22:45 -0700, sms wrote: On 3/26/2014 12:29 PM, Jeff Liebermann wrote: snip Hmmm... I haven't seen any bicycle powered can openers, but I suppose one could be designed. Speed reduction seems to be the major problem, so I would suggest an outboard worm gear, driving a sprocket, with the power transmitted to the can opener via a speedometer cable. I'm not sure there's a market, but if you label it "high efficiency" and "ecologically correct", it should bring in some sales. You need to work on a bicycle driven coffee grinder. For bicycle tourists without access to electric power the present options suck because the manual grinders are extremely slow. Contrary to what was shown in the movie City Slickers, there are no battery powered coffee grinders. The closest I've come is this: http://nordicgroup.us/bikecoff/bcimages/batterygrinder.JPG but this 12VDC grinder has been discontinued. My goodness but you Americans seem so inapt. One can easily pound coffee beans into a powder with a mortar and pestle. Just like the old folks used to. But of course, you probably can't figure out how to operate one of those. I do use a hand powered can opener though, and have never owned an electric can opener. Years ago, being the dotting husband that I am :-) I bought my wife an electric can opener. She tried it a few times and put it away and went back to the manual can opener. I can only assume that the manual opener worked better for some reason. Probably useful for people with arthritis or something. Easy enough to find a manual one that works well these days. Not like the old stab and cut ones. I would also love to find a good manual coffee grinder that didn't cause an arm and a leg so if anyone has a link... Try http://www.amazon.com/b?ie=UTF8&node=289750 they list several in the 10 - 30 dollar range. Of course you throw confusion into the game with your demand that they must be "good". Can't you be happy with the plastic junk that others find so appealing? Nah. Coffee is important. -- duane |
#53
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The last headlight you will ever need
On 28/03/14 11:28, John B. wrote:
On Fri, 28 Mar 2014 08:05:20 +1100, James wrote: On 28/03/14 03:00, Phil W Lee wrote: John B. considered Thu, 27 Mar 2014 18:51:03 +0700 the perfect time to write: On Wed, 26 Mar 2014 21:52:24 -0700, Jeff Liebermann wrote: On Wed, 26 Mar 2014 21:47:16 -0700, Jeff Liebermann wrote: 600 watts: http://www.econvergence.net/The-Pedal-A-Watt-Bicycle-Generator-Stand-s/1820.htm See bottom of page for the "400 watt grid intertie inverter". Sigh. 300 watts: http://www.pedalpowergenerator.com But can you do it for 8 hours a day, day in and day out? I really need to power some tools on the boat I'm working on which is anchored out in the harbour. You should be able to power a reasonably respectable car alternator with even a fairly modest wind turbine, which would seem ideally suited to use on a boat. That'll keep a decent 12v battery charged for either direct use, or through an inverter if you need utility voltage for your tools. I can't say that I remember using any power tools on boats when I used to help out down at the yard in Brnham-on-Crouch though. Car alternators are designed to be turned at relatively high speed compared with a windmill. The only option is to gear the windmill so that it turns the alternator at much higher speed - but then efficiency suffers as power lost in the gears. There are better solutions. And, the car alternator needs to be excited by an external power course to produce electricity - the reason that they aren't used to build wind generators :-) Once you have a battery, you have an external power source. But I know what you mean, most small wind generators use permanent magnets for the field. -- JS |
#54
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The last headlight you will ever need
On Fri, 28 Mar 2014 15:57:36 +1100, James
wrote: On 28/03/14 11:28, John B. wrote: On Fri, 28 Mar 2014 08:05:20 +1100, James wrote: On 28/03/14 03:00, Phil W Lee wrote: John B. considered Thu, 27 Mar 2014 18:51:03 +0700 the perfect time to write: On Wed, 26 Mar 2014 21:52:24 -0700, Jeff Liebermann wrote: On Wed, 26 Mar 2014 21:47:16 -0700, Jeff Liebermann wrote: 600 watts: http://www.econvergence.net/The-Pedal-A-Watt-Bicycle-Generator-Stand-s/1820.htm See bottom of page for the "400 watt grid intertie inverter". Sigh. 300 watts: http://www.pedalpowergenerator.com But can you do it for 8 hours a day, day in and day out? I really need to power some tools on the boat I'm working on which is anchored out in the harbour. You should be able to power a reasonably respectable car alternator with even a fairly modest wind turbine, which would seem ideally suited to use on a boat. That'll keep a decent 12v battery charged for either direct use, or through an inverter if you need utility voltage for your tools. I can't say that I remember using any power tools on boats when I used to help out down at the yard in Brnham-on-Crouch though. Car alternators are designed to be turned at relatively high speed compared with a windmill. The only option is to gear the windmill so that it turns the alternator at much higher speed - but then efficiency suffers as power lost in the gears. There are better solutions. And, the car alternator needs to be excited by an external power course to produce electricity - the reason that they aren't used to build wind generators :-) Once you have a battery, you have an external power source. But I know what you mean, most small wind generators use permanent magnets for the field. The ones used on yachts generally do not put out a great deal of current so having to excite them with battery power can actually end up with a net loss. -- Cheers, John B. |
#55
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The last headlight you will ever need
On 3/27/2014 7:28 PM, John B. wrote:
On Fri, 28 Mar 2014 08:05:20 +1100, James wrote: On 28/03/14 03:00, Phil W Lee wrote: John B. considered Thu, 27 Mar 2014 18:51:03 +0700 the perfect time to write: On Wed, 26 Mar 2014 21:52:24 -0700, Jeff Liebermann wrote: On Wed, 26 Mar 2014 21:47:16 -0700, Jeff Liebermann wrote: 600 watts: http://www.econvergence.net/The-Pedal-A-Watt-Bicycle-Generator-Stand-s/1820.htm See bottom of page for the "400 watt grid intertie inverter". Sigh. 300 watts: http://www.pedalpowergenerator.com But can you do it for 8 hours a day, day in and day out? I really need to power some tools on the boat I'm working on which is anchored out in the harbour. You should be able to power a reasonably respectable car alternator with even a fairly modest wind turbine, which would seem ideally suited to use on a boat. That'll keep a decent 12v battery charged for either direct use, or through an inverter if you need utility voltage for your tools. I can't say that I remember using any power tools on boats when I used to help out down at the yard in Brnham-on-Crouch though. Car alternators are designed to be turned at relatively high speed compared with a windmill. The only option is to gear the windmill so that it turns the alternator at much higher speed - but then efficiency suffers as power lost in the gears. There are better solutions. And, the car alternator needs to be excited by an external power course to produce electricity - the reason that they aren't used to build wind generators :-) For charging batteries a DC generator would be another path. They are heavier than alternators but that's not a big factor in every application. -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 |
#56
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The last headlight you will ever need
"James" wrote in message ... On 28/03/14 03:00, Phil W Lee wrote: John B. considered Thu, 27 Mar 2014 18:51:03 +0700 the perfect time to write: On Wed, 26 Mar 2014 21:52:24 -0700, Jeff Liebermann wrote: On Wed, 26 Mar 2014 21:47:16 -0700, Jeff Liebermann wrote: 600 watts: http://www.econvergence.net/The-Pedal-A-Watt-Bicycle-Generator-Stand-s/1820.htm See bottom of page for the "400 watt grid intertie inverter". Sigh. 300 watts: http://www.pedalpowergenerator.com But can you do it for 8 hours a day, day in and day out? I really need to power some tools on the boat I'm working on which is anchored out in the harbour. You should be able to power a reasonably respectable car alternator with even a fairly modest wind turbine, which would seem ideally suited to use on a boat. That'll keep a decent 12v battery charged for either direct use, or through an inverter if you need utility voltage for your tools. I can't say that I remember using any power tools on boats when I used to help out down at the yard in Brnham-on-Crouch though. Car alternators are designed to be turned at relatively high speed compared with a windmill. That was true of the old style car dynamos - less so with modern alternators. |
#57
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The last headlight you will ever need
John B. wrote:
On Fri, 28 Mar 2014 08:05:20 +1100, James wrote: On 28/03/14 03:00, Phil W Lee wrote: John B. considered Thu, 27 Mar 2014 18:51:03 +0700 the perfect time to write: On Wed, 26 Mar 2014 21:52:24 -0700, Jeff Liebermann wrote: On Wed, 26 Mar 2014 21:47:16 -0700, Jeff Liebermann wrote: 600 watts: http://www.econvergence.net/The-Pedal-A-Watt-Bicycle-Generator-Stand-s/1820.htm See bottom of page for the "400 watt grid intertie inverter". Sigh. 300 watts: http://www.pedalpowergenerator.com But can you do it for 8 hours a day, day in and day out? I really need to power some tools on the boat I'm working on which is anchored out in the harbour. You should be able to power a reasonably respectable car alternator with even a fairly modest wind turbine, which would seem ideally suited to use on a boat. That'll keep a decent 12v battery charged for either direct use, or through an inverter if you need utility voltage for your tools. I can't say that I remember using any power tools on boats when I used to help out down at the yard in Brnham-on-Crouch though. Car alternators are designed to be turned at relatively high speed compared with a windmill. The only option is to gear the windmill so that it turns the alternator at much higher speed - but then efficiency suffers as power lost in the gears. There are better solutions. And, the car alternator needs to be excited by an external power course to produce electricity - the reason that they aren't used to build wind generators :-) There's often enough residual magnetism in the stator for a car alternator to self-excite. |
#58
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The last headlight you will ever need
"Ralph Barone" wrote in message news:571029119417725637.406552address_is-invalid.invalid@shawnews... John B. wrote: On Fri, 28 Mar 2014 08:05:20 +1100, James wrote: On 28/03/14 03:00, Phil W Lee wrote: John B. considered Thu, 27 Mar 2014 18:51:03 +0700 the perfect time to write: On Wed, 26 Mar 2014 21:52:24 -0700, Jeff Liebermann wrote: On Wed, 26 Mar 2014 21:47:16 -0700, Jeff Liebermann wrote: 600 watts: http://www.econvergence.net/The-Pedal-A-Watt-Bicycle-Generator-Stand-s/1820.htm See bottom of page for the "400 watt grid intertie inverter". Sigh. 300 watts: http://www.pedalpowergenerator.com But can you do it for 8 hours a day, day in and day out? I really need to power some tools on the boat I'm working on which is anchored out in the harbour. You should be able to power a reasonably respectable car alternator with even a fairly modest wind turbine, which would seem ideally suited to use on a boat. That'll keep a decent 12v battery charged for either direct use, or through an inverter if you need utility voltage for your tools. I can't say that I remember using any power tools on boats when I used to help out down at the yard in Brnham-on-Crouch though. Car alternators are designed to be turned at relatively high speed compared with a windmill. The only option is to gear the windmill so that it turns the alternator at much higher speed - but then efficiency suffers as power lost in the gears. There are better solutions. And, the car alternator needs to be excited by an external power course to produce electricity - the reason that they aren't used to build wind generators :-) There's often enough residual magnetism in the stator for a car alternator to self-excite. That was often true of field coil motorcycle alternators, one even mentioned it in the user manual - but you needed about 3 people pushing for a flat battery bump start. With PM alternators it was never an issue. |
#59
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The last headlight you will ever need
"Phil W Lee" wrote in message ... "Ian Field" considered Fri, 28 Mar 2014 17:47:04 -0000 the perfect time to write: "James" wrote in message ... On 28/03/14 03:00, Phil W Lee wrote: John B. considered Thu, 27 Mar 2014 18:51:03 +0700 the perfect time to write: On Wed, 26 Mar 2014 21:52:24 -0700, Jeff Liebermann wrote: On Wed, 26 Mar 2014 21:47:16 -0700, Jeff Liebermann wrote: 600 watts: http://www.econvergence.net/The-Pedal-A-Watt-Bicycle-Generator-Stand-s/1820.htm See bottom of page for the "400 watt grid intertie inverter". Sigh. 300 watts: http://www.pedalpowergenerator.com But can you do it for 8 hours a day, day in and day out? I really need to power some tools on the boat I'm working on which is anchored out in the harbour. You should be able to power a reasonably respectable car alternator with even a fairly modest wind turbine, which would seem ideally suited to use on a boat. That'll keep a decent 12v battery charged for either direct use, or through an inverter if you need utility voltage for your tools. I can't say that I remember using any power tools on boats when I used to help out down at the yard in Brnham-on-Crouch though. Car alternators are designed to be turned at relatively high speed compared with a windmill. That was true of the old style car dynamos - less so with modern alternators. Which mostly come with a pulley attached which is ideally suited to providing whatever ratio is required. Rather efficiently, too. If you pick the right one, the regulator and rectifier are right in the same unit, too (at least on anything that doesn't qualify as vintage). Those alternators have a far higher range of useful operating speeds than DC generators, and although the battery stage is mandatory for the field coils, if no real storage is required, it needn't be very big. On many (or even most) boats it's already present anyway. I'm just describing what I've seen working, in a number of places that are either off-grid or where utility power is unreliable. I first saw this setup during the power cuts of the early 70s, when it became sufficiently commonplace that used alternators, regulators (many were separate in those days) and batteries from car breakers yards became very difficult to obtain, with demand outstripping supply. Somewhere I've got a PDF on modifying old automotive electricals for lighting in remote farm outbuildings and even basic home made arc welding sets - pages and pages of stuff on rewinding DC generators. Looks about 20s or 30s ish. |
#60
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The last headlight you will ever need
On Fri, 28 Mar 2014 07:36:33 -0500, AMuzi wrote:
On 3/27/2014 7:28 PM, John B. wrote: On Fri, 28 Mar 2014 08:05:20 +1100, James wrote: On 28/03/14 03:00, Phil W Lee wrote: John B. considered Thu, 27 Mar 2014 18:51:03 +0700 the perfect time to write: On Wed, 26 Mar 2014 21:52:24 -0700, Jeff Liebermann wrote: On Wed, 26 Mar 2014 21:47:16 -0700, Jeff Liebermann wrote: 600 watts: http://www.econvergence.net/The-Pedal-A-Watt-Bicycle-Generator-Stand-s/1820.htm See bottom of page for the "400 watt grid intertie inverter". Sigh. 300 watts: http://www.pedalpowergenerator.com But can you do it for 8 hours a day, day in and day out? I really need to power some tools on the boat I'm working on which is anchored out in the harbour. You should be able to power a reasonably respectable car alternator with even a fairly modest wind turbine, which would seem ideally suited to use on a boat. That'll keep a decent 12v battery charged for either direct use, or through an inverter if you need utility voltage for your tools. I can't say that I remember using any power tools on boats when I used to help out down at the yard in Brnham-on-Crouch though. Car alternators are designed to be turned at relatively high speed compared with a windmill. The only option is to gear the windmill so that it turns the alternator at much higher speed - but then efficiency suffers as power lost in the gears. There are better solutions. And, the car alternator needs to be excited by an external power course to produce electricity - the reason that they aren't used to build wind generators :-) For charging batteries a DC generator would be another path. They are heavier than alternators but that's not a big factor in every application. Yup, self exciting. But why bother? Permanent magnets work better and cheaper and by taking the power from the field coils instead of the commutator you eliminate a lot of maintenance. The guys that build their own yacht wind generator usually use DC motors as a basis. -- Cheers, John B. |
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