AeroElectric-List Digest Archive

Fri 03/24/06


Total Messages Posted: 7



Today's Message Index:
----------------------
 
     1. 09:07 AM - Two batteries and one alternator (Clint \)
     2. 10:12 AM - Re: Two batteries and one alternator (Glaeser, Dennis A)
     3. 10:30 AM - Hand held GPS/NAV. (WRBYARS@aol.com)
     4. 11:39 AM - Re: Battery charging (James Foerster)
     5. 12:49 PM - Re: Hand held GPS/NAV. (Rick Lindstrom)
     6. 12:50 PM - Re: Re: Battery charging (Bill Dube)
     7. 05:47 PM - Re: Hand held GPS/NAV. (Chris & Kellie Hand)
 
 
 


Message 1


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    Time: 09:07:52 AM PST US
    From: "Clint \"Sandy\" McNabb" <mink@cebridge.net>
    Subject: Two batteries and one alternator
    --> AeroElectric-List message posted by: "Clint \"Sandy\" McNabb" <mink@cebridge.net> I'm going to use two batteries and one alternator. Can anyone direct me to where I can get a good schematic? I don't see one in AeroElectric Connection. Sandy McNabb Glass Goose


    Message 2


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    Time: 10:12:30 AM PST US
    Subject: Re: Two batteries and one alternator
    From: "Glaeser, Dennis A" <dennis.glaeser@eds.com>
    --> AeroElectric-List message posted by: "Glaeser, Dennis A" <dennis.glaeser@eds.com> Take a look at Z-19. http://www.aeroelectric.com/PPS/Adobe_Architecture_Pdf/Z19K_1.pdf http://www.aeroelectric.com/PPS/Adobe_Architecture_Pdf/Z19K_2.pdf Dennis Glaeser RV7A ------------------------------------------------- I'm going to use two batteries and one alternator. Can anyone direct me to where I can get a good schematic? I don't see one in AeroElectric Connection. Sandy McNabb Glass Goose


    Message 3


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    Time: 10:30:43 AM PST US
    From: WRBYARS@aol.com
    Subject: Hand held GPS/NAV.
    --> AeroElectric-List message posted by: WRBYARS@aol.com Are any of you using, or have had, either of these units that would share your opinions with me about them? Does anyone want to sell their unit? Lowrance AIRMAP 2000C AvMap EKP 111C AvMap EKP 1V I would appreciate an immediate response, as we're going to replace the "Texaco GPS" that we've been using in a few days. Thanks Bill


    Message 4


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    Time: 11:39:59 AM PST US
    From: "James Foerster" <jmfpublic@comcast.net>
    Subject: RE: Battery charging
    --> AeroElectric-List message posted by: "James Foerster" <jmfpublic@comcast.net> Bob said: "There's a lot of myth and misunderstanding about the performance one can expect both in the charging and discharging of paralleled batteries. If your alternator and voltage regulator are doing their job, ALL batteries of ANY size will be serviced to their individual needs. When discharging paralleled batteries, you will have access to 100% of energy available from the sum total of energy stored irrespective of size or condition of the individual batteries." This presumes identical battery chemistry. It would be uncertain that charge requirements would be identical for an adsorbed glass mat (AGM) and a gel cell, for example. The flooded battery type would be yet another voltage point. Some battery chargers have a switch to choose the battery type. Recall that the specific gravity of the battery acid used to activate aircraft flooded cells in higher than that used for cars, and that the specific gravity of sufuric acid in a sealed AGM battery is dependent on the choice of the manufacturer. I suspect that the biggest difference in charge voltage is between those handy-available-in-smaller-size gel cells, and the AGM and flooded cell batteries, which are more similar. The gel cell is a nice, low current drain type of cell, but it may not parallel well with the other types. Jim Foerster, J400, still building


    Message 5


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    Time: 12:49:20 PM PST US
    From: Rick Lindstrom <tigerrick@mindspring.com>
    Subject: Re: Hand held GPS/NAV.
    --> AeroElectric-List message posted by: Rick Lindstrom <tigerrick@mindspring.com> Hi, Bill! I just reviewed the EKP IV in the April KITPLANES (page 47), after flying with it for 80+ hours. Overall, a very nice unit. Rick Lindstrom, Contributing Editor WRBYARS@aol.com wrote: >--> AeroElectric-List message posted by: WRBYARS@aol.com > >Are any of you using, or have had, either of these units that would share >your opinions with me about them? > >Does anyone want to sell their unit? > >Lowrance AIRMAP 2000C > >AvMap EKP 111C > >AvMap EKP 1V > >I would appreciate an immediate response, as we're going to replace the >"Texaco GPS" that we've been using in a few days. > >Thanks >Bill > > > > > > > > > > >


    Message 6


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    Time: 12:50:46 PM PST US
    From: Bill Dube <william.p.dube@noaa.gov>
    Subject: Re: RE: Battery charging
    --> AeroElectric-List message posted by: Bill Dube <william.p.dube@noaa.gov> Typically, your alternator will be set at about 13.8 to 14.2 volts. All the variations in lead-acid battery chemistry will "fully" charge at that voltage. Some may take longer than others to charge up completely, but the difference will not be that great. This is because 13.8 volts is above the "float" voltage of all of the various flavors of lead-acid batteries. You can parallel lead-acid batteries with no worries. The only possible downside to paralleling batteries is if one of them develops a shorted cell. This bad battery will discharge the good one if you don't have some sort of battery isolator to prevent that. Bill Dube' <http://www.KillaCycle.com> James Foerster wrote: >--> AeroElectric-List message posted by: "James Foerster" <jmfpublic@comcast.net> > >Bob said: > > "There's a lot of myth and misunderstanding about the performance one > can expect both in the charging and discharging of paralleled batteries. > If your alternator and voltage regulator are doing their job, ALL batteries > of ANY size will be serviced to their individual needs. When discharging > paralleled batteries, you will have access to 100% of energy available > from the sum total of energy stored irrespective of size or condition > of the individual batteries." > >This presumes identical battery chemistry. It would be uncertain that charge requirements would be identical for an adsorbed glass mat (AGM) and a gel cell, for example. The flooded battery type would be yet another voltage point. Some battery chargers have a switch to choose the battery type. Recall that the specific gravity of the battery acid used to activate aircraft flooded cells in higher than that used for cars, and that the specific gravity of sufuric acid in a sealed AGM battery is dependent on the choice of the manufacturer. I suspect that the biggest difference in charge voltage is between those handy-available-in-smaller-size gel cells, and the AGM and flooded cell batteries, which are more similar. The gel cell is a nice, low current drain type of cell, but it may not parallel well with the other types. > >Jim Foerster, J400, still building > > > > > > > > >


    Message 7


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    Time: 05:47:39 PM PST US
    From: "Chris & Kellie Hand" <ckhand@earthlink.net>
    Subject: Re: Hand held GPS/NAV.
    --> AeroElectric-List message posted by: "Chris & Kellie Hand" <ckhand@earthlink.net> I've been using the 2000C in my Cessna 140 since last summer and really like it - great unit with lots of features, good screen size & visibility. I built a mount into my RV-6A panel for the 2000C. I had used a Garmin 195 for quite a while before buying the 2000C and am impressed with the upgrade. I don't have the terrain awareness upgrade yet but will get that soon and would recommend making sure that's included if you go with the Airmap. Terrain feature wasn't available when I bought mine. Chris Hand RV-6A, finishing stages (still) ----- Original Message ----- From: <WRBYARS@aol.com> Sent: Friday, March 24, 2006 10:28 AM Subject: AeroElectric-List: Hand held GPS/NAV. > --> AeroElectric-List message posted by: WRBYARS@aol.com > > Are any of you using, or have had, either of these units that would share > your opinions with me about them? > > Does anyone want to sell their unit? > > Lowrance AIRMAP 2000C > > AvMap EKP 111C > > AvMap EKP 1V > > I would appreciate an immediate response, as we're going to replace the > "Texaco GPS" that we've been using in a few days. > > Thanks > Bill > > >




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