AeroElectric-List Digest Archive

Sun 04/19/09


Total Messages Posted: 7



Today's Message Index:
----------------------
 
     1. 12:39 PM - Choices . . . (Robert L. Nuckolls, III)
     2. 12:47 PM - Low Voltage Warning ()
     3. 01:52 PM - Re: Low Voltage Warning (Robert L. Nuckolls, III)
     4. 03:36 PM - Re: Odyssey Battery Alternative (Speedy11@aol.com)
     5. 03:44 PM - Re: Low Voltage Warning (John Morgensen)
     6. 07:11 PM - Re: Low Voltage Warning (Robert L. Nuckolls, III)
     7. 07:17 PM - Re: Re: Odyssey Battery Alternative (Robert L. Nuckolls, III)
 
 
 


Message 1


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    Time: 12:39:40 PM PST US
    From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
    Subject: Choices . . .
    At 11:44 PM 4/18/2009, you wrote: >This is my opinion also > >Joe Motis WW Corvair builder and as of yesterday CH 750 plans on order > >No archive > >In a message dated 4/18/2009 3:38:19 P.M. Pacific Daylight Time, >dale.r@cox.net writes: >I'd rather just buy ~quality~ from a responsible >manufacturer. In a truly free market activity we're well advised to establish design goals achieved within boundaries set by honorable behavior. The term "quality" is non-quantified. "Zero defect manufacturing" comes as close to being a quantity you can wrap your arms around but still doesn't speak to design service life, variables in service/ maintenance, accident, etc. From a perspective of anticipated performance, we KNOW that it's expensive and nearly impossible to predict any device's utility with accuracy. This is why failure tolerant design and (in the case of batteries) preventative maintenance monitoring/ or replacement is a good thing to do . . . no matter what brand of product you're using. It's usually those pesky "variables after the sale" that make for unhappy days in the cockpit. Unfortunately, even the best examples ("been run'n this here XYZ Battery for 6 years . . . it's never missed a lick!") are not well quantified either. So when it comes to risk of watching lights on panel go slowly dark, the purchase price, 4-color advertising and/or faith in a particular suppliers integrity doesn't count for much. Bottom line is that it's not difficult to craft and maintain the reliability of an electrical system with anyone's parts . . . but it demands some attention to detail. Bob . . . ----------------------------------------) ( . . . a long habit of not thinking ) ( a thing wrong, gives it a superficial ) ( appearance of being right . . . ) ( ) ( -Thomas Paine 1776- ) ----------------------------------------


    Message 2


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    Time: 12:47:13 PM PST US
    From: <bakerocb@cox.net>
    Subject: Low Voltage Warning
    4/19/2009 Hello Fellow Listers, A friend recently had an incident where the field wire to the alternator in his Beechcraft Sierra airplane failed. When the alternator stopped putting out amps the batteries (two 12 volt batteries in this 24 volt system airplane) eventually became depleted to the point that nothing electrical in the airplane would work. He landed safely and had the alternator field wire repaired. Now he realizes that attempting to visually monitor his ammeter constantly / frequently in order to detect a low voltage / alternator out situation is not a highly successful solution to such a problem. The question is: "What is the best way to install a readily visable low voltage warning system in this standard type certificated airplane?" Already existing STC's or _____________ ? 'OC'


    Message 3


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    Time: 01:52:02 PM PST US
    From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
    Subject: Re: Low Voltage Warning
    At 02:45 PM 4/19/2009, you wrote: > >4/19/2009 > >Hello Fellow Listers, > >A friend recently had an incident where the field wire to the >alternator in his Beechcraft Sierra airplane failed. When the >alternator stopped putting out amps the batteries (two 12 volt >batteries in this 24 volt system airplane) eventually became >depleted to the point that nothing electrical in the airplane would work. > >He landed safely and had the alternator field wire repaired. Now he >realizes that attempting to visually monitor his ammeter constantly >/ frequently in order to detect a low voltage / alternator out >situation is not a highly successful solution to such a problem. > >The question is: "What is the best way to install a readily visable >low voltage warning system in this standard type certificated >airplane?" Already existing STC's or _____________ ? An active low voltage warning system (flashing light) is what's being installed in most current certified aircraft. Unfortunately there's perhaps 100,000 airplanes that are no so blessed. If his airplane has a cigar lighter, it's pretty easy to craft something that plugs into it and avoids paper-generating mods to the aircraft. The low voltage warning hardware is stone simple. Getting permission to put it in is an entirely different matter. He might see if he can 337 an LR3-28 onto the airplane. It has the regulation, ov protection and independent LV warning in one box. On the other hand, if he'd like to Velcro something to the lower lip of the instrument panel for a whole lot less money, have him contact me directly. Bob . . . ----------------------------------------) ( . . . a long habit of not thinking ) ( a thing wrong, gives it a superficial ) ( appearance of being right . . . ) ( ) ( -Thomas Paine 1776- ) ----------------------------------------


    Message 4


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    Time: 03:36:08 PM PST US
    From: Speedy11@aol.com
    Subject: Re: Odyssey Battery Alternative
    For a bunch of pilots, you guys are pretty deep. I'm impressed. Your comments caused me to think - now my brain hurts today. Stan Sutterfield Do not archive **************A Good Credit Score is 700 or Above. See yours in just 2 easy steps! hmpgID%3D62%26bcd%3DAprilfooter419NO62)


    Message 5


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    Time: 03:44:57 PM PST US
    From: John Morgensen <john@morgensen.com>
    Subject: Re: Low Voltage Warning
    >> >> 4/19/2009 >> >> Hello Fellow Listers, >> The question is: "What is the best way to install a readily visable >> low voltage warning system in this standard type certificated >> airplane?" Already existing STC's or ___________ While fumbling around in the Garmin GPS fields, I discovered a field that displays volts and an alarm with a settable value. If you are already blessed with a portable GPS, it is worth a look. John Morgensen RV9A - wiring Grumman AA1B - Building time.


    Message 6


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    Time: 07:11:36 PM PST US
    From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
    Subject: Re: Low Voltage Warning
    At 05:43 PM 4/19/2009, you wrote: > > >>> >>>4/19/2009 >>> >>>Hello Fellow Listers, >>>The question is: "What is the best way to install a readily >>>visable low voltage warning system in this standard type >>>certificated airplane?" Already existing STC's or ___________ >While fumbling around in the Garmin GPS fields, I discovered a field >that displays volts and an alarm with a settable value. If you are >already blessed with a portable GPS, it is worth a look. Good idea John . . . in fact, there are a number of similar opportunities offered by plug-in accessories. The "fly in the soup" comes from an increasingly intransigent interpretation of the rules for "modifying" a TC aircraft. If the airplane wasn't shipped from the factory with a cigar lighter, adding a power tap later causes some folks to suggest that the mod be blessed with piles of $paper$. Now if it were my airplane . . . Bob . . . ----------------------------------------) ( . . . a long habit of not thinking ) ( a thing wrong, gives it a superficial ) ( appearance of being right . . . ) ( ) ( -Thomas Paine 1776- ) ----------------------------------------


    Message 7


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    Time: 07:17:06 PM PST US
    From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
    Subject: Re: Odyssey Battery Alternative
    At 05:32 PM 4/19/2009, you wrote: >For a bunch of pilots, you guys are pretty deep. I'm impressed. If they were "just pilots" then these kinds of conversation probably wouldn't be necessary. A discussion of options for TC aircraft seldom happens. However, as system integrators and designers who plan to pilot their work product, expanding the range and depth of such discussions is both useful and well advised. Bob . . . ----------------------------------------) ( . . . a long habit of not thinking ) ( a thing wrong, gives it a superficial ) ( appearance of being right . . . ) ( ) ( -Thomas Paine 1776- ) ----------------------------------------




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