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Bilge Pump Switch
You guys REALLY need to spend some time on a COMMERCIAL SHIP. 100
gallons of diesel fuel pumped overboard is like a teaspoon in a lake. They pump more than you store overboard just STARTING IT! Larry W4CSC 3600 planes with transponders are burning 8-10 million gallons of kerosene per hour over the USA. R-12 car air conditioners are responsible for the ozone hole, right? One small problemo with the comparison: A commercial ship or a warship is involved in essential activities. Even *if* they pollute 1000 times as much as a recreational boater, it's only because steps have been taken to reduce to that from 10,000 times. If we all decide that it's OK to pollute the water as long as it's less than a containership or an aircraft carrier pollutes, we'll be boating in one hell of a filthy soup in short order. Because our recreational boating is an "optional" exercise, undertaken on public waterways, we should try to leave the smallest possible dung pile in our wake. That doesn't mean we all need to take up sailing, IMO, but we should try to see that whatever configuration we do enjoy is operating cleanly and efficiently within the limitations of its design. |
Bilge Pump Switch
Gould 0738 wrote:
A commercial ship or a warship is involved in essential activities. Even *if* they pollute 1000 times as much as a recreational boater, it's only because steps have been taken to reduce to that from 10,000 times. Won't speak for waships because I don't work on them but as far as freighters, containerships, and tankers are concerned we discharge far less than the average Bayliner. Gray funnel liners (government owned, civilian crewed, ships of the Ready Reserve Fleet and Military Sealift Command) are "publicly owned vessels" and as such are, like warships, technically exempt from the laws and requirements imposed on civil shipping but in fact follow exactly the same practices as other US flagged civil shipping. Just because we might not get fined or jailed for pollution doesn't mean we pollute ... We do not pump bilges overboard within 12 miles of the coast, all bilge water is passed through a 15 ppm oily water separator or held for discharge ashore to a treatment facility. On tankers we do not even let rainwater go over the side in a loading or discharge port, along with bilge water it is collected in a slop tank and discharged ashore. A modern commercial vessel is cleaner than practically any pleasure vessel afloat. There are more oil slicks passing through my marina in a week than the Port of Seattle freight and oil terminals see in years. Rick |
Bilge Pump Switch
"Rick" wrote in message ink.net... Gould 0738 wrote: A commercial ship or a warship is involved in essential activities. Even *if* they pollute 1000 times as much as a recreational boater, it's only because steps have been taken to reduce to that from 10,000 times. Won't speak for waships because I don't work on them but as far as freighters, containerships, and tankers are concerned we discharge far less than the average Bayliner. Gray funnel liners (government owned, civilian crewed, ships of the Ready Reserve Fleet and Military Sealift Command) are "publicly owned vessels" and as such are, like warships, technically exempt from the laws and requirements imposed on civil shipping but in fact follow exactly the same practices as other US flagged civil shipping. Just because we might not get fined or jailed for pollution doesn't mean we pollute ... We do not pump bilges overboard within 12 miles of the coast, all bilge water is passed through a 15 ppm oily water separator or held for discharge ashore to a treatment facility. On tankers we do not even let rainwater go over the side in a loading or discharge port, along with bilge water it is collected in a slop tank and discharged ashore. A modern commercial vessel is cleaner than practically any pleasure vessel afloat. There are more oil slicks passing through my marina in a week than the Port of Seattle freight and oil terminals see in years. Rick Of course ballast tanks are a different thing, or did those round gobies and zebra mussels get into the great lakes by immaculate conception? Why are the shippers resisting flushing ballast tanks with salt water en route? del cecchi |
Bilge Pump Switch
Del Cecchi wrote:
Of course ballast tanks are a different thing, or did those round gobies and zebra mussels get into the great lakes by immaculate conception? Why are the shippers resisting flushing ballast tanks with salt water en route? Have you considered that the reason ballast exchange (BWE)laws now exist is because traditional practices were discovered to be the source of those zebra mussels and gobies? There is little "resistance" to ballast water exchange. It has been required by the International Maritime Organization since 1997. There are several options under consideration to replace BWE since for many ships exchanging ballast water in mid ocean is akin to a sailboat exchanging its keel in the same conditions. Ballast is onboard to ensure the ship's stability and removing it places the ship in a very precarious state in less than ideal sea and weather conditions. It is a time consuming practice and some runs do not provide enough time in mid ocean, if the ship even reaches mid ocean, to completely exchange all ballast. There are several other systems under development to sterilize ballast water. Ballast water is tested for exotics and to ensure that ballast exchange has been conducted. A Google search will enlighten you with many documents concerning this issue. But like any other activity, there are those who will falsify documents, take shortcuts or evade the regulations, they are not representative of the industry any more than the yachtie who pumps his holding tank into the channel or pumps his oil bilge into the marina at night is representative of the entire yachting community. Rick |
Bilge Pump Switch
"Rick" wrote in message k.net... Del Cecchi wrote: Of course ballast tanks are a different thing, or did those round gobies and zebra mussels get into the great lakes by immaculate conception? Why are the shippers resisting flushing ballast tanks with salt water en route? Have you considered that the reason ballast exchange (BWE)laws now exist is because traditional practices were discovered to be the source of those zebra mussels and gobies? There is little "resistance" to ballast water exchange. It has been required by the International Maritime Organization since 1997. There are several options under consideration to replace BWE since for many ships exchanging ballast water in mid ocean is akin to a sailboat exchanging its keel in the same conditions. Ballast is onboard to ensure the ship's stability and removing it places the ship in a very precarious state in less than ideal sea and weather conditions. It is a time consuming practice and some runs do not provide enough time in mid ocean, if the ship even reaches mid ocean, to completely exchange all ballast. There are several other systems under development to sterilize ballast water. Ballast water is tested for exotics and to ensure that ballast exchange has been conducted. A Google search will enlighten you with many documents concerning this issue. But like any other activity, there are those who will falsify documents, take shortcuts or evade the regulations, they are not representative of the industry any more than the yachtie who pumps his holding tank into the channel or pumps his oil bilge into the marina at night is representative of the entire yachting community. Rick We got spiny water fleas in 84, zebra mussels in 88, and round and tube-nose goby in 90. And in 97 something was finally done. Hot damn. Way to react quickly there. And I don't care if you swap the bilge water in mid ocean or 5 miles off the beach. If there isn't time then slow down. del cecchi |
Bilge Pump Switch
"Rick" wrote in message k.net... Del Cecchi wrote: Of course ballast tanks are a different thing, or did those round gobies and zebra mussels get into the great lakes by immaculate conception? Why are the shippers resisting flushing ballast tanks with salt water en route? Have you considered that the reason ballast exchange (BWE)laws now exist is because traditional practices were discovered to be the source of those zebra mussels and gobies? There is little "resistance" to ballast water exchange. It has been required by the International Maritime Organization since 1997. snip I forgot this one, just found. I guess your systems aren't working so well Cercopagis pengoi is the latest exotic crustacean to invade the Great Lakes. This predatory cladoceran was first identified by Canadian scientists in early August of 1998, and was reported via Internet by Dr. Hugh MacIsaac at the end of August . Cercopagis is indigenous to the Caspian, Azov, and Aral seas (Rivier 1998), and was reported to have invaded the Baltic Sea in 1992 (Ojaveer & Lumberg 1995, Ojaveer 1997). |
Bilge Pump Switch
Del Cecchi wrote:
And I don't care if you swap the bilge water in mid ocean or 5 miles off the beach. It is obvious you don't really care and can't be bothered to research the efforts underway to reduce the problem. Rather than waste my time arguing with you I will let your statement speak for itself, it clearly shows the level of your understanding. If you feel the need to lash out in a fit of ignorant rage go down to the docks and scream at the nearest ship. Rick |
Bilge Pump Switch
"Rick" wrote in message k.net... Del Cecchi wrote: And I don't care if you swap the bilge water in mid ocean or 5 miles off the beach. It is obvious you don't really care and can't be bothered to research the efforts underway to reduce the problem. Rather than waste my time arguing with you I will let your statement speak for itself, it clearly shows the level of your understanding. If you feel the need to lash out in a fit of ignorant rage go down to the docks and scream at the nearest ship. Rick Oh you are so noble. Sorry to disturb your existence with my little list of exotic invaders brought to the great lakes by pristine, environmentally concerned international shipping industry. I bet they are taking these actions to clean their ballast out of sheer altruistic motives. del |
Bilge Pump Switch
I used a water switch from a washing machine. I don't remember the size of the
PVC cap but it was used by a lot of the local shrimpers in their old wooden boats ( read leak a lot ). The switch is usually in the control top part. They recommended using a smaller longer hose and mounted the switch high on the bulkhead. Mine worked for a little over 5 years with out problems. ( Sold the boat ). It would take a little experimenting but easy engulf to find the cap size. They heater a brass hose barb and just screwed it in to the hole, I drilled & taped it. It isn’t boat pretty but very useful. For the delay the Radio Shack idea seems the best. Mike. ***************** However I am sick of replacing bilge pump switches. ( I have a shed full of floats!) I thought to seal a mercury switch and put it on the float when the float goes up the pump comes on (through a good relay) However the switch comes on the pump runs for a very short time and just clicks on and off driving the relay crazy. I need to have a delay that will keep the relay pulled in say 5 to 10 seconds before dropping out and resetting. Anyone have an idea or circuit that will do this for me. Thanks Oliver Fleming |
Bilge Pump Switch
Groco makes an air activated switch like this for boats. I have one in mine
and love it. The only thing sticking down into the bilge is a little bell shaped upside down "cup" with the hose leading up to the switch, a couple of feet above. When the water rises, the pressure inside the switch triggers the bilge pump. "MIDEMETZ" wrote in message ... I used a water switch from a washing machine. I don't remember the size of the PVC cap but it was used by a lot of the local shrimpers in their old wooden boats ( read leak a lot ). The switch is usually in the control top part. They recommended using a smaller longer hose and mounted the switch high on the bulkhead. Mine worked for a little over 5 years with out problems. ( Sold the boat ). It would take a little experimenting but easy engulf to find the cap size. They heater a brass hose barb and just screwed it in to the hole, I drilled & taped it. It isn't boat pretty but very useful. For the delay the Radio Shack idea seems the best. Mike. ***************** However I am sick of replacing bilge pump switches. ( I have a shed full of floats!) I thought to seal a mercury switch and put it on the float when the float goes up the pump comes on (through a good relay) However the switch comes on the pump runs for a very short time and just clicks on and off driving the relay crazy. I need to have a delay that will keep the relay pulled in say 5 to 10 seconds before dropping out and resetting. Anyone have an idea or circuit that will do this for me. Thanks Oliver Fleming |
Bilge Pump Switch
We recently installed a "automatic" pump in the forward bilge on one of
the charter boats. The way I understand it, the pump spins its impeller and if it detects water, it keeps pumping. No external switch needed. Have a look at the link below. http://www.westmarine.com/webapp/wcs...productId=2576 Capt. Frank Keith wrote: Groco makes an air activated switch like this for boats. I have one in mine and love it. The only thing sticking down into the bilge is a little bell shaped upside down "cup" with the hose leading up to the switch, a couple of feet above. When the water rises, the pressure inside the switch triggers the bilge pump. "MIDEMETZ" wrote in message ... I used a water switch from a washing machine. I don't remember the size of the PVC cap but it was used by a lot of the local shrimpers in their old wooden boats ( read leak a lot ). The switch is usually in the control top part. They recommended using a smaller longer hose and mounted the switch high on the bulkhead. Mine worked for a little over 5 years with out problems. ( Sold the boat ). It would take a little experimenting but easy engulf to find the cap size. They heater a brass hose barb and just screwed it in to the hole, I drilled & taped it. It isn't boat pretty but very useful. For the delay the Radio Shack idea seems the best. Mike. ***************** However I am sick of replacing bilge pump switches. ( I have a shed full of floats!) I thought to seal a mercury switch and put it on the float when the float goes up the pump comes on (through a good relay) However the switch comes on the pump runs for a very short time and just clicks on and off driving the relay crazy. I need to have a delay that will keep the relay pulled in say 5 to 10 seconds before dropping out and resetting. Anyone have an idea or circuit that will do this for me. Thanks Oliver Fleming |
Bilge Pump Switch
"Meindert Sprang" wrote in message ... "Vito" wrote in message ... del cecchi wrote: "Larry Demers" wrote ... A series cap with the diode seems like a better idea to try. This is a DC system in the average boat. There is only one polarity of inductive kick. Diodes work fine. Capacitors in series with the diode wouldn't work at all. That's odd considering that literally millions of DC automobile ignition systems used a capacitor in parallel with the "points" to protect them from the coil's inductive kick. BTW, the "kick" is damped AC. That has a different reason. Damping a coil with a diode does the job, since the induction voltage is ALWAYS the opposite as the originating voltage. But, using a diode keeps the current flowing while the magnetic field collapses. This causes a slow collapse of the field. In a coil in the car (is it called bobbin?) has to produce a high voltage and therefore the field has to collapse as fast as possible. Therefore a capacitor is used with certain value to get the best trade-off between generated high voltage and RF interference surpression. Meindert The capacitor across the points has its voltage reset to zero when the points close. The capacitor acts to supress arcing by slowing the rise time of the current decrease when the points open. The resulting oscillation in the series tuned circuit is damped by the secondary driving the spark through the plug. In the case of the relay coil, there is no secondary. If there were no diode, the tuned circuit would oscillate for a long time. With the diode, the inductive kick will be stored on the capacitor and, being unable to discharge through the reverse biased diode, will stay there for a long time. During that time the diode will never turn on, due to the voltage on the capacitor. del cecchi |
Bilge Pump Switch
Sigvaldi Eggertsson wrote:
The climate of Iceland is not much different from the UK one, maritime temperate with mild winters and cool summers. You were probably thinking about Greenland? I figured it must not be terribly bad in Iceland. Otherwise they would not be able to grow all those gorgeous women. :-) -- Glenn Ashmore I'm building a 45' cutter in strip/composite. Watch my progress (or lack there of) at: http://www.rutuonline.com Shameless Commercial Division: http://www.spade-anchor-us.com I'veheard the rule of thumb esxpressed, "Geenland is white, but Iceland is green." |
Bilge Pump Switch
"Vito" wrote in message ... Meindert Sprang wrote: The small oscillation you get has nothing to do with mass of electrons and their inertia. It is caused by the fact that every coil has a bit of parasitic capacitance, forming a resonant loop with the inductance of the coil, ... Yes but Meindert old bean, if electrons didn't have inertia resonant circuits wouldn't resonate. Is this a feeble attempt at humor, or are you an idiot? Sometimes hard to tell on the net. del cecchi |
Bilge Pump Switch
Del Cecchi wrote:
"Vito" wrote Yes but Meindert old bean, if electrons didn't have inertia resonant circuits wouldn't resonate. Is this a feeble attempt at humor, or are you an idiot? Neither one. Do you doubt that electrons have mass and therefore inertia? If they did not, then current would stop at once when the coil unsaturated. But it does not. The little buggers keep going til they've charged the capacitor (parasitic in this case but still real). Then (Bugle sounds retreat) they head the other way re energizing the coil ..... etc. .... creating a damped AC wave. Sometimes hard to tell on the net. Yes indeed. |
Bilge Pump Switch
"Vito" wrote in message
... Del Cecchi wrote: "Vito" wrote Yes but Meindert old bean, if electrons didn't have inertia resonant circuits wouldn't resonate. Is this a feeble attempt at humor, or are you an idiot? Neither one. Do you doubt that electrons have mass and therefore inertia? If they did not, then current would stop at once when the coil unsaturated. But it does not. Sorry to say Vito, but that is completely nonsense. The reason current keeps folwing for a while is magnetism. Current flowing through a wire creates a magnetic field around the wire. Also, a changing magnetic field induces current in a wire. What happens when you open the contact is this: the current stops flowing, the existing static field collapses and is therefore changing. And the field change induces a current in the wire in the opposite direction. In a straight wire this effect is hardly noticable but coiled up, the field around the wire concentrates and the effect gets bigger. And if you still believe in electron inertia, I advise you to go and read a book about basic electric laws. Meindert |
Bilge Pump Switch
Meindert Sprang wrote:
And if you still believe in electron inertia, I advise you to go and read a book about basic electric laws. But Meindert, I weld from time to time and as you probably know welding requires large current flows. This means huge numbers of electrons are racing along the wire to the welding rod. I have noticed that when I pull the rod away from the work it always has a big blob on the end. Are you saying this isn't because all those electrons kept rushing into the hot metal and caused it to bulge out when they had no place to go? Rick |
Bilge Pump Switch
"Vito" wrote in message ... Del Cecchi wrote: "Vito" wrote Yes but Meindert old bean, if electrons didn't have inertia resonant circuits wouldn't resonate. Is this a feeble attempt at humor, or are you an idiot? Neither one. Do you doubt that electrons have mass and therefore inertia? If they did not, then current would stop at once when the coil unsaturated. But it does not. The little buggers keep going til they've charged the capacitor (parasitic in this case but still real). Then (Bugle sounds retreat) they head the other way re energizing the coil .... etc. .... creating a damped AC wave. Sometimes hard to tell on the net. Yes indeed. Next you will be telling me that you think the electrons are shooting through the wire so fast that they just keep going and end up in a pile on the other end, until they shoot back the other way. Snort, giggle, choke. Yes the electrons have mass. It has nothing to do with how they behave in electric circuits. |
Bilge Pump Switch
"Rick" wrote in message
ink.net... Meindert Sprang wrote: And if you still believe in electron inertia, I advise you to go and read a book about basic electric laws. But Meindert, I weld from time to time and as you probably know welding requires large current flows. This means huge numbers of electrons are racing along the wire to the welding rod. I have noticed that when I pull the rod away from the work it always has a big blob on the end. Are you saying this isn't because all those electrons kept rushing into the hot metal and caused it to bulge out when they had no place to go? :-)) By the way, take a good look at your car's headlights: if you take a right turn, the right headlight gets a little dim because all electrons are forced to the left side of the wiring in the car. You know, inertia, centrifugal forces and all.... Meindert |
Bilge Pump Switch
On Thu, 30 Oct 2003 19:45:41 +0100, "Meindert Sprang"
tempted fate with: By the way, take a good look at your car's headlights: if you take a right turn, the right headlight gets a little dim because all electrons are forced to the left side of the wiring in the car. You know, inertia, centrifugal forces and all.... Meindert I've worried about my VHF antenna. It's way up at the top of my mast. Are the electrons slowing down on the way up? And when they come falling back down the coax like little bombs and plow into my radio, can they damage it? Is there a radiation hazard? __________________________________________________ __________ Glen "Wiley" Wilson usenet1 SPAMNIX at worldwidewiley dot com To reply, lose the capitals and do the obvious. Take a look at cpRepeater, my NMEA data integrator, repeater, and logger at http://www.worldwidewiley.com/ |
Bilge Pump Switch
Simply install a strong magnet at the top of your mast. It will pull the
tired electrons up and it will slow the plummet of the downward electrons. You should also be worried about your computer's hard drive. Data is stored in binary format, 1 and 0. The zero has slightly greater mass and therefore, if you haven't balanced your hard drive lately you could be wearing out your bearings prematurely. You can download software from the web for this. "Glen Wiley Wilson" wrote in message ... On Thu, 30 Oct 2003 19:45:41 +0100, "Meindert Sprang" tempted fate with: By the way, take a good look at your car's headlights: if you take a right turn, the right headlight gets a little dim because all electrons are forced to the left side of the wiring in the car. You know, inertia, centrifugal forces and all.... Meindert I've worried about my VHF antenna. It's way up at the top of my mast. Are the electrons slowing down on the way up? And when they come falling back down the coax like little bombs and plow into my radio, can they damage it? Is there a radiation hazard? __________________________________________________ __________ Glen "Wiley" Wilson usenet1 SPAMNIX at worldwidewiley dot com To reply, lose the capitals and do the obvious. Take a look at cpRepeater, my NMEA data integrator, repeater, and logger at http://www.worldwidewiley.com/ |
Bilge Pump Switch
When you were welding, were you using DC, DC Reverse or AC?
Rick wrote: Meindert Sprang wrote: And if you still believe in electron inertia, I advise you to go and read a book about basic electric laws. But Meindert, I weld from time to time and as you probably know welding requires large current flows. This means huge numbers of electrons are racing along the wire to the welding rod. I have noticed that when I pull the rod away from the work it always has a big blob on the end. Are you saying this isn't because all those electrons kept rushing into the hot metal and caused it to bulge out when they had no place to go? Rick -- Dan Best - (707) 431-1662, Healdsburg, CA 95448 B-2/75 1977-1979 Tayana 37 #192, "Tricia Jean" http://rangerbest.home.comcast.net/TriciaJean.JPG |
Bilge Pump Switch
Dan Best wrote:
When you were welding, were you using DC, DC Reverse or AC? The rod bulges with DCEN (straight polarity) I get equal bead and bulge when using AC Rick |
Bilge Pump Switch
On Thu, 30 Oct 2003 21:19:11 GMT, Rick
tempted fate with: I get equal bead and bulge when using AC I get equal bead and bulge when using Viagra. __________________________________________________ __________ Glen "Wiley" Wilson usenet1 SPAMNIX at worldwidewiley dot com To reply, lose the capitals and do the obvious. Take a look at cpRepeater, my NMEA data integrator, repeater, and logger at http://www.worldwidewiley.com/ |
Bilge Pump Switch
On Thu, 30 Oct 2003 20:49:46 GMT, "Paul" tempted
fate with: You should also be worried about your computer's hard drive. Data is stored in binary format, 1 and 0. The zero has slightly greater mass and therefore, if you haven't balanced your hard drive lately you could be wearing out your bearings prematurely. This suggests that you could make laptops lighter by leaving out the zeros. Is this how zip files work? But I don't understand. A 0 is nothing, right? How can 1 be less than 0? Is 2 also less than 0? Or is it just less than 1? Is this why they say less is more? I heard that there are ony 10 kinds of people in the world, those who know binary and those who don't. __________________________________________________ __________ Glen "Wiley" Wilson usenet1 SPAMNIX at worldwidewiley dot com To reply, lose the capitals and do the obvious. Take a look at cpRepeater, my NMEA data integrator, repeater, and logger at http://www.worldwidewiley.com/ |
Bilge Pump Switch
One atom bumps into another atom.
"Hey! you stole one of my electrons" "Are you sure" "I'm positive!" "Meindert Sprang" wrote in message And if you still believe in electron inertia, I advise you to go and read a book about basic electric laws. |
Bilge Pump Switch
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1 ["Followup-To:" header set to rec.boats.cruising.] On Thu, 30 Oct 2003 18:49:26 +0100, Meindert Sprang wrote: "Vito" wrote in message ... Del Cecchi wrote: "Vito" wrote Yes but Meindert old bean, if electrons didn't have inertia resonant circuits wouldn't resonate. Is this a feeble attempt at humor, or are you an idiot? Neither one. Do you doubt that electrons have mass and therefore inertia? If they did not, then current would stop at once when the coil unsaturated. But it does not. Sorry to say Vito, but that is completely nonsense. The reason current keeps folwing for a while is magnetism. Current flowing through a wire creates a magnetic field around the wire. Also, a changing magnetic field induces current in a wire. What happens when you open the contact is this: the current stops flowing, the existing static field collapses and is therefore changing. And the field change induces a current in the wire in the opposite direction. In a straight wire this effect is hardly noticable but coiled up, the field around the wire concentrates and the effect gets bigger. And if you still believe in electron inertia, I advise you to go and read a book about basic electric laws. Electrons have mass, ergo, they have inertia. Not much it's true, but it's there. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.3 (GNU/Linux) iD8DBQE/oa0Rd90bcYOAWPYRAoQxAJwIllgThmFDe7rSJEomB/YAcQVbxACeIpim Lf4nvhTQXoAQz3I0Q9WevDo= =qSk9 -----END PGP SIGNATURE----- -- Jim Richardson http://www.eskimo.com/~warlock Some people are born normal, some people achieve normality, and some have normalcy thrust upon them by a nice nurse with a hypodermic. |
Bilge Pump Switch
Glen Wilson wrote:
I get equal bead and bulge when using Viagra. I suppose it helps if you increase the stickout on your wirefeed. Rick |
Bilge Pump Switch - New Rule switch bad out of box.
Isn't that what a diode is for? A little check valve? ;)
Speaking of float switches, I installed a brand new Rule superswitch yesterday. Tested it out, worked fine the FIRST time. After that, when I released it it wouldn't cut off unless I cycled it up and down and banged on it a bit. Sheesh. "Glen Wiley Wilson" wrote in message ... On Thu, 30 Oct 2003 19:45:41 +0100, "Meindert Sprang" tempted fate with: By the way, take a good look at your car's headlights: if you take a right turn, the right headlight gets a little dim because all electrons are forced to the left side of the wiring in the car. You know, inertia, centrifugal forces and all.... Meindert I've worried about my VHF antenna. It's way up at the top of my mast. Are the electrons slowing down on the way up? And when they come falling back down the coax like little bombs and plow into my radio, can they damage it? Is there a radiation hazard? __________________________________________________ __________ Glen "Wiley" Wilson usenet1 SPAMNIX at worldwidewiley dot com To reply, lose the capitals and do the obvious. Take a look at cpRepeater, my NMEA data integrator, repeater, and logger at http://www.worldwidewiley.com/ |
Bilge Pump Switch
Meindert Sprang wrote:
Sorry to say Vito, but that is completely nonsense. The reason current keeps folwing for a while is magnetism. Current flowing through a wire creates a magnetic field around the wire. Also, a changing magnetic field induces current in a wire. What happens when you open the contact is this: the current stops flowing, the existing static field collapses and is therefore changing. And the field change induces a current in the wire in the opposite direction. But current continues to flow even after the magnetic field has collapsed. You can prove that with the right instruments. And if you still believe in electron inertia, I advise you to go and read a book about basic electric laws. I did, at Bell Labs - you know the folks who invented transistors, et cetera. Electrons have mass everything with mass has inertia. Look it up in any basic physics book, or better yet memorize http://www.newtonphysics.on.ca/EINSTEIN/Appendix1.html. Exam next Thursday (c: |
Bilge Pump Switch - New Rule switch bad out of box.
I installed a replacement Rule Superswitch in July and one of the
flexible ligaments connecting the mercury switch in the float opened in two months. Replaced with Sureflow Piranha float switch without flexing leads (after getting a refund from West Marine for the Superswitch) Dick Keith wrote: Isn't that what a diode is for? A little check valve? ;) Speaking of float switches, I installed a brand new Rule superswitch yesterday. Tested it out, worked fine the FIRST time. After that, when I released it it wouldn't cut off unless I cycled it up and down and banged on it a bit. Sheesh. |
Bilge Pump Switch - New Rule switch bad out of box.
Richard Lane wrote in message ...
I installed a replacement Rule Superswitch in July and one of the flexible ligaments connecting the mercury switch in the float opened in two months. Replaced with Sureflow Piranha float switch without flexing leads (after getting a refund from West Marine for the Superswitch) Dick When I worked for GM, the first thing suspect in an electrical problem was "out of the box" parts ;). Scotty, electrical guy... Keith wrote: Isn't that what a diode is for? A little check valve? ;) Speaking of float switches, I installed a brand new Rule superswitch yesterday. Tested it out, worked fine the FIRST time. After that, when I released it it wouldn't cut off unless I cycled it up and down and banged on it a bit. Sheesh. |
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