AeroElectric-List Digest Archive

Tue 06/22/10


Total Messages Posted: 8



Today's Message Index:
----------------------
 
     1. 11:44 AM - ov module (bob noffs)
     2. 01:29 PM - Re: ov module (Robert L. Nuckolls, III)
     3. 04:41 PM - Re: ov module (bob noffs)
     4. 06:13 PM - Re: ov module (Robert L. Nuckolls, III)
     5. 07:54 PM - Z-13 Alternator & Starter Wire Size (jonlaury)
     6. 08:32 PM - Re: Z-13 Alternator & Starter Wire Size (Robert L. Nuckolls, III)
     7. 09:25 PM - Re: PolyFiber silver coats and their effect on radio signals (Matthew Schumacher)
     8. 10:30 PM - ICOM A 210 matched with a Flightcom 403 intercom (gordon)
 
 
 


Message 1


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    Time: 11:44:27 AM PST US
    Subject: ov module
    From: bob noffs <icubob@gmail.com>
    hi bob, i am labeling my panel and have a somewhat dumb question........what to label the warning light that goes on if the ov s tripped? low voltage? alternator off line? i guess i am not sure what to label the 20 amp breaker in this system that takes the alt. off line. thanks, bob noffs


    Message 2


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    Time: 01:29:01 PM PST US
    From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
    Subject: Re: ov module
    At 12:49 PM 6/22/2010, you wrote: >hi bob, > i am labeling my panel and have a somewhat dumb > question........what to label the warning light that goes on if the > ov s tripped? low voltage? alternator off line? LO VOLTS Doesn't matter why it's on, it can turn on for a variety of reasons including an ov trip. > i guess i am not sure what to label the 20 amp breaker in this > system that takes the alt. off line. > thanks, bob noffs ?? 20A ??? which breaker is this ?? Is this the b-lead breaker for a PM alternator? If so, label it ALT Bob . . .


    Message 3


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    Time: 04:41:59 PM PST US
    Subject: Re: ov module
    From: bob noffs <icubob@gmail.com>
    yes bob, it is the breaker that the ov mod opens. thanks for the replys, bob noffs On Tue, Jun 22, 2010 at 3:30 PM, Robert L. Nuckolls, III < nuckolls.bob@aeroelectric.com> wrote: > nuckolls.bob@aeroelectric.com> > > > At 12:49 PM 6/22/2010, you wrote: > >> hi bob, >> i am labeling my panel and have a somewhat dumb question........what to >> label the warning light that goes on if the ov s tripped? low voltage? >> alternator off line? >> > > LO VOLTS > > Doesn't matter why it's on, it can turn > on for a variety of reasons including an > ov trip. > > > i guess i am not sure what to label the 20 amp breaker in this system that >> takes the alt. off line. >> thanks, bob noffs >> > > ?? 20A ??? which breaker is this ?? > > Is this the b-lead breaker for a PM alternator? > If so, label it > > ALT > > > Bob . . . > >


    Message 4


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    Time: 06:13:57 PM PST US
    From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
    Subject: Re: ov module
    At 06:40 PM 6/22/2010, you wrote: >yes bob, it is the breaker that the ov mod opens. thanks for the >replys, bob noffs I'm not sure what this breaker is. There are no AeroElectric drawings that show a breaker greater than 5A associated with a crowbar ov protection system. Are you using a Z-figure? What kind of alternator. Where is the breaker located in the system? Bob . . .


    Message 5


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    Time: 07:54:53 PM PST US
    Subject: Z-13 Alternator & Starter Wire Size
    From: "jonlaury" <jonlaury@impulse.net>
    After looking at a copper wire resistance chart and playing with V=DIR, it seems as if the 4AWG callout on Z-13 for the B lead is overkill for a 60 amp alternator and even for the start circuit. For the alternator, wouldn't 10AWG be sufficient for a 1' run to the starter contactor? Voltage drop= 1' x 60a x .00118, or .07v And could the 2'start circuit for my 1.5kw starter (125a @ 12v) be comfortable with losing .12v using 6awg .12v=1' x 125a x .000465? Just checking with you all to make sure that I'm not overlooking something in trying to keep my plane on a diet. John Read this topic online here: http://forums.matronics.com/viewtopic.php?p=302139#302139


    Message 6


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    Time: 08:32:26 PM PST US
    From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
    Subject: Re: Z-13 Alternator & Starter Wire Size
    At 09:53 PM 6/22/2010, you wrote: > >After looking at a copper wire resistance chart and playing with >V=DIR, it seems as if the 4AWG callout on Z-13 for the B lead is >overkill for a 60 amp alternator and even for the start circuit. > >For the alternator, wouldn't 10AWG be sufficient for a 1' run to >the starter contactor? Voltage drop= 1' x 60a x .00118, or .07v > >And could the 2'start circuit for my 1.5kw starter (125a @ 12v) be >comfortable with losing .12v using 6awg .12v=1' x 125a x .000465? > >Just checking with you all to make sure that I'm not overlooking >something in trying to keep my plane on a diet. Your doing just fine for a design goal that has weight very high up on the list of priorities . . . Having offered that, total weight savings is pretty small. If I were building an airplane where the battery, alternator and starter were all within say 3 feet of each other, I'd wire with 4AWG for all the fat wires and exploit the single source of inexpensive wire. Keep in mind too, temperature rise. THATS what really limits the wire's current carrying abilities . . .it's the insulation that dies first, the copper is good for a whole lot more. That 4AWG welding cable is pretty attractive. For the few ounces of difference I'd probably be better off cutting back a tad on the Big Macs. But that's just me . . . Bob . . .


    Message 7


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    Time: 09:25:05 PM PST US
    From: Matthew Schumacher <schu@schu.net>
    Subject: Re: PolyFiber silver coats and their effect on radio
    signals On 06/05/2010 05:06 PM, James Kilford wrote: > > Gents, > > I had been wondering, for some time, what to do about the PolyFiber > PolySpray coats. PolySpray is a metal-loaded paint that is used to > protect PolyFiber fabric from UV damage. > > I'd wanted to put all the aerials inside my fuselage, but was > concerned that the PolySpray would attenuate radio signals to/from > COM, NAV, GPS (especially) and XPNDR. PolyFiber's own advice was to > put the aerials outside the fuselage, and to definitely use the > PolySpray coating, to ensure longevity of fabric (apparently the > PolySpray increases the fabric's life 4-fold!). > > To cut a long story short, I decided to chance it -- with PolySpray > and internal aerials -- and see what happened, figuring that I could > move the aerials outside the fuselage if necessary. > > Today, I did tests to see if the aerials function as I would wish, and > they did. The PolySpray coats appear to have made no difference to > the signals -- even the presumably very small GPS signal. I don't > have anything in the way of scientific instruments, just the signal > strength shown on the GPS and hand-held radio, but using the > fuselage-mounted aerials makes no discernible difference to the signal > strength compared to the equipment's own aerials. I've yet to test > the NAV / XPNDR aerials, but I assume the same will hold true for > those too. > > FWIW! > > James > This is very interesting because a fellow in our RC airplane club covered a model with polyspray and he couldn't get his airplane to pass radio check and crashed two other models. He tried both 72mhz and 2.4ghz radios, but gave up because it just wasn't reliable. He went back to using plastic film. schu


    Message 8


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    Time: 10:30:37 PM PST US
    Subject: ICOM A 210 matched with a Flightcom 403 intercom
    From: "gordon" <gptailwind@msn.com>
    Several weeks ago you gave me some good info in that the ICOM A-210 and the Flight Com 403 are compatable. I have it installed and with much adjusting ect everything except volume adjustment are fine. I have called 2 times to Icom Tec and get no satisfaction. The way it is, You can only have a volumn control is to go into Menu..The first item that comes up is HP LEVEL which is headphone level. This is the same as (Vol). These are the 3 options I have. AF gain: The output level is the same as (Vol). Off (0) While muting the headphone. 01-80 Setting audio level from 1 to 80. So according to ICOM Tec supportthey recommend (and I am already using this method) is to put he Vol as high as needed and then control it with the volume controls on my Lightspeed headsets. If I try to use the normal Volume control like I normally would, just reach over and adjust ., Nothing happens The scale shows up on the front, you know it goes up and down as you turn the knob but nothing happens. So according to Icom that seems to be the only way it can be done unless I put in audio panel. I dont have the room and dont want to do it. Have flown with it this way and the com works fine. Doesnt pick up the loud noise. And am able to communicate fine. The transceiver works fine also. Its just the Idea that if you want more volume if I dont have enough thru the headset controls, I have to go into menu and dial in more. Does any one have any suggestions or has anyone had this problem . Thanks Gordon [/list] -------- tailwind10 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=302171#302171




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