Today's Message Index:
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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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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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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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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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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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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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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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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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