REFLECTOR: Bus, Battery & Back Order

[Scott Derrick]

The GRT EIS already has a low voltage warning built in, with a panel 
mounted LED that lights up if any parameter is out of range, voltage 
being to high or to low being two of these alerts.

Why add another system to complicate things?  Or is the GRT EIS the 
system you were talking about.

Scott

Keith Hallsten wrote:

>Terry,
>
>That low-voltage warning light is the key item of electrical system
>instrumentation.  I have decided against an ammeter - I don't think it tells
>me anything I need to know in flight.  I'm using a little SD-8 backup
>alternator on the vacuum pump pad, so my "main alternator out" drill will be
>to turn on the SD-8 and shed load until the low volts light goes out.  At
>that point I know that I'm not draining the battery, so it will be available
>for the approach and landing phase.  A voltmeter and ammeter may be of some
>use in troubleshooting on the ground, but I have no intention of
>troubleshooting in flight.
>
>We have plenty of panel real estate in the XL, so I don't see any problem
>with 3.125" backup gauges.  My panel layout shows a lot of blank panel!
>
>Keith
>
>
>
>-----Original Message-----
>From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
>Behalf Of Terrence Miles
>Sent: Wednesday, June 15, 2005 8:16 PM
>To: reflector at tvbf.org
>Subject: RE: REFLECTOR: Bus, Battery & Back Order
>
>Keith,
>Thanks.  I should have mentioned that I also plan a big--very bright low 
>voltage warning and guage.  That is the best argument for splitting off the 
>aux batt in flight and running only the the main batt---I mean the situation
>
>when the alternator goes inop, you don't notice, now the batt drains off and
>
>your first indication is a dark silent cockpit.  Also planned is an ammeter 
>so I can watch the download and know what I have.
>
>Also on the GRT.  I have found to drop the EIS altitude and airspeed is 
>looking like big dials 3.12 inch versus 2.25 inch versus none at all if I 
>stay w/ the EIS.  My choice for Big dials due little are cheaper.  Little 
>altitude mean a single needle, little IAS means 180 kts max.  To get over 
>about 220 kts you to buy tso'd stuff.  I am looking at $275 ias and 155 alt.
>
>Check out Stein air on autopilots.  TruTrak is announcing soon a retangular 
>shapped autopilot.
>
>see ya
>Terry
>
>
>
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