Today's Message Index:
----------------------
1. 05:04 AM - voltage monitoring (bob noffs)
2. 04:43 PM - Off Topic: G'mint Auctions (Eric M. Jones)
3. 05:15 PM - Re: voltage monitoring (Dave Morris \)
4. 07:40 PM - Re: voltage monitoring (Rodney Dunham)
Message 1
INDEX | Back to Main INDEX |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | voltage monitoring |
--> AeroElectric-List message posted by: "bob noffs" <icubob@newnorth.net>
hi bob,
i am looking over z-20 for a jabiru engine. i will be using a grand rapids eis
monitor . should i also install the crowbar over voltage module and the low voltage
monitor ? g.r. offers a voltage monitor, are the other 2 monitors more
likely to prevent damage by incorrect voltage? thanks, bob noffs
Message 2
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Off Topic: G'mint Auctions |
--> AeroElectric-List message posted by: "Eric M. Jones" <emjones@charter.net>
If you have too much time and money on your hands (or you just want to see where
your tax money goes), check out--
http://www.govliquidation.com/
They are having a great electronic test equipment internet auction right now.
This is the way the military disposes of their excess "Stuff" and you can buy amazing
deals in oscilloscopes, Fluke meters, and all the really cool nerdy stuff.
(My signal generator, and an awesome HP54502A digital scope which I need to
fix... and several other devices came from these guys).
Registration is simple and there are no tricks. Just watch the added charges for
transportation and the condition codes. The neatest auction are those that say,
"14 pallets of electronics...no further information." and they show a photo
of ...well....14 pallets of stained and slightly mangled boxes of stuff.
Many years ago two teenagers bought "Large Crate, A/C parts...no further information"
and won a complete F104B fighter in a crate.
They routinely have flight instruments. A few weeks ago they had entire "flight
instrument six packs" suitable for most home-builts. You can buy a couple lots,
sell what you don't want on eBay and use the money to buy other things. Not
too bad as hobbies go.
Regards,
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge MA 01550-2705
(508) 764-2072
Message 3
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: voltage monitoring |
--> AeroElectric-List message posted by: "Dave Morris \"BigD\"" <BigD@DaveMorris.com>
The GRT "monitor" just alerts you to the voltage discrepancy. It doesn't
do anything about it. If you can remember to react quickly enough, you
don't need automated devices. What the LV and OV devices do is to handle
the voltage problem for you (disconnect the main bus or disconnect the
alternator) very fast for you, so you don't have to try to remember what to
do in each case.
Dave Morris
At 06:58 AM 10/17/2005, you wrote:
>--> AeroElectric-List message posted by: "bob noffs" <icubob@newnorth.net>
>
>hi bob,
> i am looking over z-20 for a jabiru engine. i will be using a grand
> rapids eis monitor . should i also install the crowbar over voltage
> module and the low voltage monitor ? g.r. offers a voltage monitor, are
> the other 2 monitors more likely to prevent damage by incorrect voltage?
> thanks, bob noffs
>
>
Message 4
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | RE: voltage monitoring |
7.50 BARRACUDA_HEADER_FP56 RBL: Blacklist bl.spamcop
[Blocked - see <http://www.spamcop.net/bl.shtml?65.54.162.200>]
--> AeroElectric-List message posted by: "Rodney Dunham" <rdunhamtn@hotmail.com>
Bob,
I too am about to wire a Jabiru with Z-20 architecture or similar.
A friend of mine recently had a voltage regulator fail in his Challenger II.
He runs a Rotax 503 (which uses a PM alternator similar to the Jabiru) and a
Key West voltage regulator in a Kuntlzleman hot box. He monitors with the
Grand Rapids EIS.
He first noticed high voltages in the 18V range. He thought it was
everything EXCEPT voltage regulator failure. The big red light would come on
and the screen would tell him about it but the EIS didn't DO anything about
it! He'd radio us in flight and ask what we thought might be wrong. He never
took his alternator off line because he can't! He just flew to the next
landing opportunity and scratched his head. Meanwhile...
With Bob's OV protection system the alternator is taken off line immediately
and automatically. You don't have to figure anything out or take any action.
16V for 5 millisec and the crowbar pops the breaker. More importantly, you
won't hurt your plane while you're trying to decide what to do. It's done.
That's that. And you can figure it out later.
My friend doesn't have any other problems he's aware of as a result of his
recent problem but who knows? This kind of damage is incremental. Something
else may fail prematurely later and he'll not put the two together.
Well, I'm probably preaching to the choir, but I'm putting OV protection on
mine.
Rodney in Tennessee
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|