---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Fri 02/22/08: 15 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 05:26 AM - Re: Garmin396/SL40 interface (Dale Ensing) 2. 06:56 AM - Re: Nanchang CJ6 Overvoltage Protector (Craig Winkelmann, CFI) 3. 07:21 AM - Re: AUX BAttery Charging (Matt Prather) 4. 07:22 AM - [OT] boat wiring specificity (Gilles Thesee) 5. 07:59 AM - Re: AUX BAttery Charging (Robert L. Nuckolls, III) 6. 12:24 PM - Re: Garmin396/SL40 interface (Vernon Little) 7. 01:01 PM - Shunt Psychology (Speedy11@aol.com) 8. 03:36 PM - Re: Shunt Psychology (Bob White) 9. 03:36 PM - Re: Shunt Psychology (Brooke Wolf) 10. 03:50 PM - 220 VOLT COMPRESSOR (John Danielson) 11. 03:56 PM - Re: AUX BAttery Charging () 12. 04:19 PM - Re: 220 VOLT COMPRESSOR (Bob White) 13. 04:27 PM - Re: Shunt Psychology (Dale Ensing) 14. 05:50 PM - Re: 220 VOLT COMPRESSOR (Joe Ronco) 15. 10:14 PM - Re: 220 VOLT COMPRESSOR (Vernon Little) ________________________________ Message 1 _____________________________________ Time: 05:26:48 AM PST US From: "Dale Ensing" Subject: Re: AeroElectric-List: Garmin396/SL40 interface MessageThanks Allan, Pleae don't spend a lot of time to go back through your manual. It is only academic for me as I am now using the 396. I do intend to sell the 296 so would like to pass along the info if the function is there. When I go down thru the menus under the Com 1 and Com 2 tabs there is no option that indicates there is VHF out. The wiring diagram in my manual is very clear but again no indication of any VHF signal. Dale ----- Original Message ----- From: Allan Aaron To: aeroelectric-list@matronics.com Sent: Thursday, February 21, 2008 10:38 PM Subject: RE: AeroElectric-List: Garmin396/SL40 interface I need to go back through the manual, but I know there are two com outputs on the 296, one I use for A/P and the other for the SL40. I seem to remember that there is a wiring schematic in the 296 manual that made it pretty clear how to wire it up to the radio. I read it first in the SL40 manual - just wired it up and it worked. I would probably not have realised it unless i had read the SL40 manual first. If you want me to dig the info out the the manuals, let me know. Allan ------------------------------------------------------------------------- ----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Dale Ensing Sent: Friday, 22 February 2008 1:13 PM To: aeroelectric-list@matronics.com Subject: Re: AeroElectric-List: Garmin396/SL40 interface Allan and Vern, I am curious.....how did you guys learn of the GPS/SL49 interface function on the 296? There is nothing about it in the manual and nothing on the product info pages on the Garmin web site. Dale do not archive ----- Original Message ----- From: Allan Aaron To: aeroelectric-list@matronics.com Sent: Thursday, February 21, 2008 6:14 PM Subject: RE: AeroElectric-List: Garmin396/SL40 interface I have a 296 and mine does it. Allan ------------------------------------------------------------------------- --- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Dale Ensing Sent: Friday, 22 February 2008 9:22 AM To: aeroelectric-list@matronics.com Subject: Re: AeroElectric-List: Garmin396/SL40 interface Vern, you must have a different version of the 296 then mine. I still have my 296 and just checked the book. It says nothing about this function. Or, it this a well kept secret by Garmin? Dale ----- Original Message ----- From: Vernon Little To: aeroelectric-list@matronics.com Sent: Thursday, February 21, 2008 4:07 PM Subject: RE: AeroElectric-List: Garmin396/SL40 interface Actually, this is the operation of my 296. 396 is the same. Vern -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of B Tomm Sent: February 21, 2008 10:56 AM To: aeroelectric-list@matronics.com Subject: RE: AeroElectric-List: Garmin396/SL40 interface Does anybody know if this feature also applies to the the 296? Bevan ------------------------------------------------------------------------ From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Vernon Little Sent: Thursday, February 21, 2008 8:39 AM To: aeroelectric-list@matronics.com Subject: RE: AeroElectric-List: Garmin396/SL40 interface The 396 also sends the frequencies of the nearest airport automatically to the Com. Or if you are in a programmed route, the frequency of the next airport waypoint is sent. You can also send manually as you have noted. Very handy. -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Dale Ensing Sent: February 20, 2008 5:52 PM To: aeroelectric-list@matronics.com Subject: AeroElectric-List: Garmin396/SL40 interface I have been considering wiring my Garmin 396 GPS to the SL40 COM for frequency loading into the COM and wondering if it is worthwhile doing. I do not understand what action loads the com list for an airport from the GPS to the Com. Have study both the GPS and SL40 manuals but my old brain isn't getting it. When the Com tab is selected on the airport page in the GPS, does that automatically send the list to the COM? What am I missing? Dale Ensing href="http://www.matronics.com/Navigator?AeroElectric-List">http://www. matronics.com/Navigator?AeroElectric-List href="http://forums.matronics.com">http://forums.matronics.com href="http://www.matronics.com/contribution">http://www.matronics.com/c href="http://www.matronics.com/Navigator?AeroElectric-List">http://www. matronics.com/Navigator?AeroElectric-List href="http://forums.matronics.com">http://forums.matronics.com href="http://www.matronics.com/contribution">http://www.matronics.com/c href="http://www.matronics.com/Navigator?AeroElectric-List">http://www. matronics.com/Navigator?AeroElectric-List href="http://forums.matronics.com">http://forums.matronics.com href="http://www.matronics.com/contribution">http://www.matronics.com/c href="http://www.matronics.com/Navigator?AeroElectric-List">http://www. matronics.com/Navigator?AeroElectric-List href="http://forums.matronics.com">http://forums.matronics.com href="http://www.matronics.com/contribution">http://www.matronics.com/c href="http://www.matronics.com/Navigator?AeroElectric-List">http://www. matronics.com/Navigator?AeroElectric-List href="http://forums.matronics.com">http://forums.matronics.com href="http://www.matronics.com/contribution">http://www.matronics.com/c href="http://www.matronics.com/Navigator?AeroElectric-List">http://www. matronics.com/Navigator?AeroElectric-List href="http://forums.matronics.com">http://forums.matronics.com href="http://www.matronics.com/contribution">http://www.matronics.com/c href="http://www.matronics.com/Navigator?AeroElectric-List">http://www. matronics.com/Navigator?AeroElectric-List href="http://forums.matronics.com">http://forums.matronics.com href="http://www.matronics.com/contribution">http://www.matronics.com/c ________________________________ Message 2 _____________________________________ Time: 06:56:03 AM PST US Subject: AeroElectric-List: Re: Nanchang CJ6 Overvoltage Protector From: "Craig Winkelmann, CFI" Bob: THANKS!! Any idea what the price will be? I'll make a post on the Yak list that they will be available soon and the price. Then, how do we order them? I have a 2 1/2 year old so I do understand the need to be a mom (or dad) FIRST!! Craig Read this topic online here: http://forums.matronics.com/viewtopic.php?p=165554#165554 ________________________________ Message 3 _____________________________________ Time: 07:21:28 AM PST US Subject: Re: AeroElectric-List: AUX BAttery Charging From: "Matt Prather" That sounds like a decent mix of components to get the job done. What's the voltage on the aux battery? The max amps will depend on the state of charge and the internal resistance of the battery and the voltage drop across the diode. I would have guessed that 5A would be plenty. Is this diode a two-lead device (anode and cathode only - I see that it's listed as a rectifier diode)? Do you only have two of the leads connected? I assume you have it wired like this: main_bus --> 5A fuse --> diode --> +lead on aux battery What model/brand/specs is the aux battery? Regards, Matt- > > > All. > > I have a 4AMP/HR battery as an AUX battery for my EFIS. > I am charging it via the main bus. > > Bus-5amp fuse-diode-aux bat. 18G wire > The Diode has the #'s 339 and IN5400 on it. > > The 5 amp fuse blows! > > How can I get around this. I am assuming the AUX bat is drawing a greater > current if it gets depleted a resonable amount and this is blowing th > fuse. > > Do I need to increase the size of the wire and fuse? > What is the max AMPs that will be drawn by the AUX bat? > > Thanks > Chris Byrne > SYDNEY > > ________________________________ Message 4 _____________________________________ Time: 07:22:47 AM PST US From: Gilles Thesee Subject: AeroElectric-List: [OT] boat wiring specificity Bob and all, A buddy just asked me some advice about the electrical circuit of the 22 ft sailing boat he is building for a transatlantic race this summer. He intends to use lithium batteries and fuel cells to power a navigation unit, autopilot, LED navigation lights, one VHF, SSB and a basic GPS. As several listers here may have experience with ocean racing, would anyone give opinions as to the main differences with aviation wiring techniques ? Any input appreciated. Thanks in advance Best regards, -- Gilles http://contrails.free.fr ________________________________ Message 5 _____________________________________ Time: 07:59:42 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: AUX BAttery Charging At 05:25 PM 2/22/2008 +1100, you wrote: > > >All. > >I have a 4AMP/HR battery as an AUX battery for my EFIS. >I am charging it via the main bus. > >Bus-5amp fuse-diode-aux bat. 18G wire >The Diode has the #'s 339 and IN5400 on it. > >The 5 amp fuse blows! > >How can I get around this. I am assuming the AUX bat is drawing a greater >current if it gets depleted a resonable amount and this is blowing th fuse. > >Do I need to increase the size of the wire and fuse? >What is the max AMPs that will be drawn by the AUX bat? > >Thanks >Chris Byrne >SYDNEY What you're experiencing is one of several reasons I crafted the aux battery management module some years ago. See: http://www.aeroelectric.com/articles/bat_iso2.pdf http://www.aeroelectric.com/Catalog/AEC/9005/9005-701B.pdf The AEC9005 product has been discontinued and will be replaced by a newer design. In the mean time, there's no reason that folks can craft a similar device themselves. However, understand that it's real easy to get wrapped around the "aux battery isolation" axle. Whether your system has two or ten batteries in the system, the generalized operating scenario says for normal operations, ALL batteries can be hard-connected to the charging system. By "hard" I'm saying closed contacts of a switch or relay. When and if the low volts warning light comes on, we now have the task of SEPARATING each of the batteries into it's unique duties for mitigating the effects of alternator failure. The time that a pilot has to effect this separation IS NOT a tense, borderline emergency situation demanding millisecond response. It's perfectly okay if battery isolation is immediate and automatic by means of diodes and/or aux battery management systems . . . but if the pilot decided to finish a cup of coffee or fold some maps before manually opening the connection pathways that isolate various batteries, the outcome of the flight would not be measurably different. The sum total of energy on the batteries needs to be a known quantity, part of your plan-B for dealing with alternator failure. It's my fondest wish that everyone who reads these words is PLANNING, DESIGNING, and MAINTAINING their battery management philosophy for HOURS of no-sweat, alternator failure-management flight. This is diametrically opposed to the FAA blessed notion of carrying a minimum of 30-minutes of EMERGENCY operation. So, it's a perfectly okay thing if your aux battery charging path were simply replaced with a switch as opposed to the diode mentioned. It's also perfectly okay that the aux battery charging feeder be some kind of boss-hog conductor. Say 14AWG and 15A fuse. Now, keep in mind that there are huge current sources at BOTH ends of this feeder so BOTH ends should be fused if the feeders are of significant length. No doubt what you've observed is a demonstration of the capability for even a very small battery to ACCEPT charging currents at rates much higher than the anticipated loads on the battery itself. This is why I like to place ALL batteries close together, tie them together in a cluster with hard contacts and short, fat wires. This is why you don't see any fuses or long feeders in the Z-figures to wire multiple batteries. When the various and sundry manufacturer's of products recommend some itty-bitty "back up" battery to support their customer's desire to keep the product working, the dirty little details of the physics for making seamless installation the battery can start jumping up to nibble at your heels. If your airplane's electrical system will benefit from multiple power sources over and above the classic single-battery/single- alternator architecture, first add the second alternator if you can (Z-13/8). If a second battery is your only viable option, then consider a REAL battery sitting right next to the MAIN battery and connected to the system by a fat wire and hard switched contactor. In your particular case, it may be that you're too far down the path of adding an itty-bitty backup battery to the system so consider first upsizing the feeders and their protection levels. If the wires either side of the diode are relatively short, say 6-12" you can leave the fuses out entirely. I'd upsize the diode to one leg of a more robust device like: http://www.aeroelectric.com/Pictures/Wiring_Technique/diode_wiring.jpg Bob . . . ________________________________ Message 6 _____________________________________ Time: 12:24:22 PM PST US From: "Vernon Little" Subject: RE: AeroElectric-List: Garmin396/SL40 interface I think Garmin intro'd this function early last year. You need to upgrade the software if you haven't in a while. Vern -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Dale Ensing Sent: February 22, 2008 5:20 AM Subject: Re: AeroElectric-List: Garmin396/SL40 interface Thanks Allan, Pleae don't spend a lot of time to go back through your manual. It is only academic for me as I am now using the 396. I do intend to sell the 296 so would like to pass along the info if the function is there. When I go down thru the menus under the Com 1 and Com 2 tabs there is no option that indicates there is VHF out. The wiring diagram in my manual is very clear but again no indication of any VHF signal. Dale ----- Original Message ----- From: Allan Aaron Sent: Thursday, February 21, 2008 10:38 PM Subject: RE: AeroElectric-List: Garmin396/SL40 interface I need to go back through the manual, but I know there are two com outputs on the 296, one I use for A/P and the other for the SL40. I seem to remember that there is a wiring schematic in the 296 manual that made it pretty clear how to wire it up to the radio. I read it first in the SL40 manual - just wired it up and it worked. I would probably not have realised it unless i had read the SL40 manual first. If you want me to dig the info out the the manuals, let me know. Allan _____ From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Dale Ensing Sent: Friday, 22 February 2008 1:13 PM Subject: Re: AeroElectric-List: Garmin396/SL40 interface Allan and Vern, I am curious.....how did you guys learn of the GPS/SL49 interface function on the 296? There is nothing about it in the manual and nothing on the product info pages on the Garmin web site. Dale do not archive ----- Original Message ----- From: Allan Aaron Sent: Thursday, February 21, 2008 6:14 PM Subject: RE: AeroElectric-List: Garmin396/SL40 interface I have a 296 and mine does it. Allan _____ From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Dale Ensing Sent: Friday, 22 February 2008 9:22 AM Subject: Re: AeroElectric-List: Garmin396/SL40 interface Vern, you must have a different version of the 296 then mine. I still have my 296 and just checked the book. It says nothing about this function. Or, it this a well kept secret by Garmin? Dale ----- Original Message ----- From: Vernon Little Sent: Thursday, February 21, 2008 4:07 PM Subject: RE: AeroElectric-List: Garmin396/SL40 interface Actually, this is the operation of my 296. 396 is the same. Vern -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of B Tomm Sent: February 21, 2008 10:56 AM Subject: RE: AeroElectric-List: Garmin396/SL40 interface Does anybody know if this feature also applies to the the 296? Bevan _____ From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Vernon Little Sent: Thursday, February 21, 2008 8:39 AM Subject: RE: AeroElectric-List: Garmin396/SL40 interface The 396 also sends the frequencies of the nearest airport automatically to the Com. Or if you are in a programmed route, the frequency of the next airport waypoint is sent. You can also send manually as you have noted. Very handy. -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Dale Ensing Sent: February 20, 2008 5:52 PM Subject: AeroElectric-List: Garmin396/SL40 interface I have been considering wiring my Garmin 396 GPS to the SL40 COM for frequency loading into the COM and wondering if it is worthwhile doing. I do not understand what action loads the com list for an airport from the GPS to the Com. Have study both the GPS and SL40 manuals but my old brain isn't getting it. When the Com tab is selected on the airport page in the GPS, does that automatically send the list to the COM? What am I missing? Dale Ensing href="http://www.matronics.com/Navigator?AeroElectric-List">http://www. matro nics.com/Navigator?AeroElectric-List href="http://forums.matronics.com">http://forums.matronics.com href="http://www.matronics.com/contribution">http://www.matronics.com/c href="http://www.matronics.com/Navigator?AeroElectric-List">http://www. matro nics.com/Navigator?AeroElectric-List href="http://forums.matronics.com">http://forums.matronics.com href="http://www.matronics.com/contribution">http://www.matronics.com/c href="http://www.matronics.com/Navigator?AeroElectric-List">http://www. matro nics.com/Navigator?AeroElectric-List href="http://forums.matronics.com">http://forums.matronics.com href="http://www.matronics.com/contribution">http://www.matronics.com/c href="http://www.matronics.com/Navigator?AeroElectric-List">http://www. matro nics.com/Navigator?AeroElectric-List href="http://forums.matronics.com">http://forums.matronics.com href="http://www.matronics.com/contribution">http://www.matronics.com/c href="http://www.matronics.com/Navigator?AeroElectric-List">http://www. matro nics.com/Navigator?AeroElectric-List href="http://forums.matronics.com">http://forums.matronics.com href="http://www.matronics.com/contribution">http://www.matronics.com/c href="http://www.matronics.com/Navigator?AeroElectric-List">http://www. matro nics.com/Navigator?AeroElectric-List href="http://forums.matronics.com">http://forums.matronics.com href="http://www.matronics.com/contribution">http://www.matronics.com/c href="http://www.matronics.com/Navigator?AeroElectric-List">http://www. matro nics.com/Navigator?AeroElectric-List href="http://forums.matronics.com">http://forums.matronics.com href="http://www.matronics.com/contribution">http://www.matronics.com/c href="http://www.matronics.com/Navigator?AeroElectric-List">http://www. matro nics.com/Navigator?AeroElectric-List href="http://forums.matronics.com">http://forums.matronics.com href="http://www.matronics.com/contribution">http://www.matronics.com/c ________________________________ Message 7 _____________________________________ Time: 01:01:38 PM PST US From: Speedy11@aol.com Subject: AeroElectric-List: Shunt Psychology Pilots of the electric internet, The shunt I'm connecting has four nuts and four lock washers - two on each stud. Hmmm ... this is starting to sound more like anatomy than psychology. Anyway, why are there two nuts on each stud? Oh boy, that's going to get a lot of responses, isn't it? Stan Sutterfield **************Ideas to please picky eaters. Watch video on AOL Living. (http://living.aol.com/video/how-to-please-your-picky-eater/rachel-campos-duffy/ 2050827?NCID=aolcmp00300000002598) ________________________________ Message 8 _____________________________________ Time: 03:36:48 PM PST US From: Bob White Subject: Re: AeroElectric-List: Shunt Psychology On Fri, 22 Feb 2008 15:54:53 EST Speedy11@aol.com wrote: > Pilots of the electric internet, > The shunt I'm connecting has four nuts and four lock washers - two on each > stud. Hmmm ... this is starting to sound more like anatomy than psychology. > Anyway, why are there two nuts on each stud? Oh boy, that's going to get a > lot of responses, isn't it? > Stan Sutterfield > > Hi Stan, Not so complicated, one nut and one washer makes sure the stud stay connected to the shunt. The second nut and lock washer makes sure the terminal stays connected to the stud. Bob W. -- N93BD - Rotary Powered BD-4 - http://www.bob-white.com 3.8 Hours Total Time and holding Cables for your rotary installation - http://roblinstores.com/cables/ ________________________________ Message 9 _____________________________________ Time: 03:36:48 PM PST US From: "Brooke Wolf" Subject: Re: AeroElectric-List: Shunt Psychology Hi Stan I used to know a Stan Sutterfield who was an IP at Vance AFB. That wouldn't be you would it? Brooke Wolf ----- Original Message ----- From: Speedy11@aol.com To: aeroelectric-list@matronics.com Sent: Friday, February 22, 2008 3:54 PM Subject: AeroElectric-List: Shunt Psychology Pilots of the electric internet, The shunt I'm connecting has four nuts and four lock washers - two on each stud. Hmmm ... this is starting to sound more like anatomy than psychology. Anyway, why are there two nuts on each stud? Oh boy, that's going to get a lot of responses, isn't it? Stan Sutterfield ------------------------------------------------------------------------- ----- Delicious ideas to please the pickiest eaters. Watch the video on AOL Living. ________________________________ Message 10 ____________________________________ Time: 03:50:38 PM PST US From: "John Danielson" Subject: AeroElectric-List: 220 VOLT COMPRESSOR Bob, I had a 120 volt air compressor and change to a 220 volt model thinking I would save some on my electrical bill. I was under the impression that the amp's being drawn would be cut in half when going to 220V. A friend says the 220 v motor will still draw the same amps. That each leg of the 220 v will draw half the amp's but the combined draw is still the full draw of the 110 v. I told him that hat is correct but that one leg of the 220 v line will be out of phase with the other, so only half the amps are being required. Is this correct? Thanks John L. Danielson ________________________________ Message 11 ____________________________________ Time: 03:56:00 PM PST US From: Subject: Re: AeroElectric-List: AUX BAttery Charging Thanks to Bob, Matt and Max for your replies. Bob the AUX Batt is just being used to power the EFIS during engine cranking. I lose the EFIS initialization and have to sit in the one spot for 2 mins after engine start for the GYRO's to align. It is also a last ditch power source for the SBY ADI (TRUTRACK) in case every thing turns to poo. I have the Z13/8. One main batt and 35 AMP ALT and the B & C 8 AMP ALT. I think I will try and optimise the setup I have. The wires to and from the diode are less than 12 inches. I had see your AUX BATT drawing but wanted to try and keep this as simple as possible, providing it works of course. THanks again guys. Chris Byrne SYDNEY ________________________________ Message 12 ____________________________________ Time: 04:19:41 PM PST US From: Bob White Subject: Re: AeroElectric-List: 220 VOLT COMPRESSOR On Fri, 22 Feb 2008 16:47:24 -0700 "John Danielson" wrote: > Bob, > > I had a 120 volt air compressor and change to a 220 volt model thinking I > would save some on my electrical bill. > > I was under the impression that the amp's being drawn would be cut in half > when going to 220V. > > A friend says the 220 v motor will still draw the same amps. That each leg > of the 220 v will draw half the amp's but the combined draw is still the > full draw of the 110 v. > > I told him that hat is correct but that one leg of the 220 v line will be > out of phase with the other, so only half the amps are being required. > > Is this correct? > > > > Thanks > > John L. Danielson > In a word, no, it is not correct. You are going to need a certain amount of power depending on the HP rating of your electric motor. Maybe the 220V motor is a little more efficient, but I don't think much. You do get some benefit from lower losses in the 220V circuit because of the lower current. If you need a really big compressor (big motor) you might need to go to 220V because you can't deliver enough current at 120V. For the record, both 120 and 220 circuits are single phase. The current in the common between the two phases is zero, but all the current you are using is flowing in the hot wires. All said, there are advantages to going to 220V, but you won't be saving 1/2 the power when running the same size compressor. Bob W. -- N93BD - Rotary Powered BD-4 - http://www.bob-white.com 3.8 Hours Total Time and holding Cables for your rotary installation - http://roblinstores.com/cables/ ________________________________ Message 13 ____________________________________ Time: 04:27:17 PM PST US From: "Dale Ensing" Subject: Re: AeroElectric-List: Shunt Psychology The leads connected to the shunt are tightened between the nuts/lock washers on each stud. That way you do not torque on the stud mounting in the shunt. ----- Original Message ----- From: Speedy11@aol.com To: aeroelectric-list@matronics.com Sent: Friday, February 22, 2008 3:54 PM Subject: AeroElectric-List: Shunt Psychology Pilots of the electric internet, The shunt I'm connecting has four nuts and four lock washers - two on each stud. Hmmm ... this is starting to sound more like anatomy than psychology. Anyway, why are there two nuts on each stud? Oh boy, that's going to get a lot of responses, isn't it? Stan Sutterfield ------------------------------------------------------------------------- ----- Delicious ideas to please the pickiest eaters. Watch the video on AOL Living. ________________________________ Message 14 ____________________________________ Time: 05:50:34 PM PST US From: "Joe Ronco" Subject: RE: AeroElectric-List: 220 VOLT COMPRESSOR JOHN: From my limited electrical knowledge, HP = Watts (746 watts = 1 HP). Watts = Volts x Amps. Your power bill is paid on the number of Watts used. For a given HP motor the Watts is the fixed, so at 220 Volts you will have the same Watts but half the Amps that you would have with 110 Volt power supply. Therefore your power bill will not change. Hope this makes sense. Joe Ronco. From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of John Danielson Sent: Friday, February 22, 2008 4:47 PM Subject: AeroElectric-List: 220 VOLT COMPRESSOR Bob, I had a 120 volt air compressor and change to a 220 volt model thinking I would save some on my electrical bill. I was under the impression that the amp's being drawn would be cut in half when going to 220V. A friend says the 220 v motor will still draw the same amps. That each leg of the 220 v will draw half the amp's but the combined draw is still the full draw of the 110 v. I told him that hat is correct but that one leg of the 220 v line will be out of phase with the other, so only half the amps are being required. Is this correct? Thanks John L. Danielson ________________________________ Message 15 ____________________________________ Time: 10:14:27 PM PST US From: "Vernon Little" Subject: RE: AeroElectric-List: 220 VOLT COMPRESSOR > Bob, > > I had a 120 volt air compressor and change to a 220 volt model > thinking I would save some on my electrical bill. > > I was under the impression that the amp's being drawn would be cut in > half when going to 220V. > > A friend says the 220 v motor will still draw the same amps. That each > leg of the 220 v will draw half the amp's but the combined draw is > still the full draw of the 110 v. > > I told him that hat is correct but that one leg of the 220 v line will > be out of phase with the other, so only half the amps are being > required. > > Is this correct? > Theoretically, if you are consuming the same volume of air at a given pressure, a 110 and 220 compressor will consume the same energy and the average powers will be the same. (other than slight differences between compressor types and design). Vern ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.