Today's Message Index:
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1. 05:41 AM - Re: Solid State Contactors -- SuperSwitch? (user9253)
2. 06:01 AM - Re: Voltage gauge question (user9253)
3. 01:10 PM - Wide angle LED indicators (rparigoris)
4. 02:47 PM - Re: Solid State Contactors -- SuperSwitch? (John Burnaby)
5. 03:10 PM - Re: Help with an BMA EFIS/One question (Speedy11@aol.com)
6. 03:51 PM - Re: Solid State Contactors -- SuperSwitch? (ROGER & JEAN CURTIS)
7. 06:11 PM - Re: Solid State Contactors -- SuperSwitch? (Robert L. Nuckolls, III)
8. 07:36 PM - Re: Z8 scrapped . . . (jonlaury)
Message 1
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| Subject: | Re: Solid State Contactors -- SuperSwitch? |
Solid state contactors might have a small leakage current when they are off.
Joe
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=289477#289477
Message 2
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| Subject: | Re: Voltage gauge question |
The vast majority of electrical problems are bad connections, so check those.
Pull on wires to make sure they are not broken.
The symptoms point towards a bad voltmeter (or its connections). Connect your
hand held meter to the exact same two points that the panel meter is connected
to, both hot and ground. If they do not read approximately the same, then
one of them is lying.
Joe
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=289485#289485
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| Subject: | Wide angle LED indicators |
Because of building model electric planes that we primarily fly at night, we have
collected quite the assortment of LEDs. Whenever we see something interesting,
usual end up getting a few samples to fool with. collection is from the big
4 > Mouser, Digikey, Allied and Newark as well as Best Hong Kong, Hosfelt and
others.
Now that it's time to install indicators and warning LEDs on Europa XS we quickly
came to realization that unless a warning indicator is in your direct line
of vision, it ain't gonna get your attention too quickly during when operated
in direct sunlight. we are going to use some nice black bezeled indicators for
non-critical indicators. Pepboys and Advace Auto are going to be suppliers for
wide angled warning LEDs! you see we want several warning LEDs by knees. For
three pretty important LEDs, Rotax 914 TCU Red and Orange and Oil pressure going
to use a cluster of 4 LEDs from Advanced. These are super bright and the cluster
of 4 is mounted on a small circuit board. By drilling a cluster of 4 holes
and allowing tips stick out a bit, the tips glow plenty bright, available
in Red, and Yellow at least. The neat thing is there is no flange on side of LEDs.
For other warning LEDs, Pepboys sell single LEDs that are ultrabright. Same
thing, no flange on sides and long enough to allow tip to stick out of panel,
small OD, available in red, Yellow and probably blue at least. Both Pepboys
and Advanced sell a neat wide angle LED where the face has a counterbore, may
be 5/16" or 3/8" OD (I forget) but very wide angle viewing but only available
in Blue, White and Yellow/Orange, no Red.
http://shop.advanceautoparts.com/webapp/wcs/stores/servlet/product_Hyper-Bright-Amber-LED-Automotive-Bulb-Pair-Jam-Strait_6120511-P_N3157A_A%7CGRP2044____
I got a pack of 3 from Pepboys but these are probably similar (didn't see these
in Advance and Pepboys website is poor at best):
http://shop.advanceautoparts.com/webapp/wcs/stores/servlet/product_HyperLED-Red-Alpena_6120501-P_N3157A_A%7CGRP2044____
you can get these in Yellow/Orange and Blue, I didn't see in Red:
http://shop.advanceautoparts.com/webapp/wcs/stores/servlet/product_194-WHITE-LED-BULBS-Pilot_6460030-P_N3157A_A%7CGRP2044____
Ron Parigoris
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=289549#289549
Message 4
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| Subject: | Re: Solid State Contactors -- SuperSwitch? |
Haven't used these, but they look identical to Teledyne's. $$ to donuts
that the manufacturer is the same.
http://www.futurlec.com/RelSS.shtml
Message 5
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| Subject: | Re: Help with an BMA EFIS/One question |
Dick,
Not many people are still installing the elderly gold boxes. I know of
one guy where I live who ripped out his old BMA equipment and switched to
normal steam gauges. He may still have his old box, but I'll have to check
with him. I'm on the road right now and don't have his email address. I can
check with him when I get home. Let me know if you'd like me to check
with him. I'm sure he'd be happy to part with it.
Do not archive
Stan Sutterfield
I have a BMA EFIS/One G3 gold box. My plane is to the point where I have
started
checking out the avionics interconnections. I have the EFIS connected to
my
SL30 and to my Trutrak autopilot. The
Trutrak was not communicating so I opened the EFIS/One up to take a look.
I discovered
that the additional serial ports, one of which is connected to the Trutrak
and which I assumed were a standard
part of the EFIS/One, are not there. Contacting "alumni" from BMA
indicates that
the serial ports were an option - which I didn't request since I didn't
know
they were optional.
In any case, the ports were on a standard PC104 quad serial port board
which I
could easily add to my system if I only knew what board it was and what
settings
on the board.
So far no one with any involvement with BMA has been able to help me
identify the
board.
So my questions are:
Is there any one who has an EFIS/One G3 with the serial port option that
could
open their box and either take a picture of each side of the top (approx
3.5"x3.5")
board or let me know of any
manufacturing numbers on the board?
Or, is there anyone with this EFIS that has the serial ports, is not using
the
extra serial ports (ports 2-5) and would be interested in selling me the
serial
port board? Or, if the price is right,
the entire G3.
And for those of you who are not aware, there is someone on the BMA forums
that
is currently working to get regular chart updates going again (with Greg's
blessing).
The plan is for them to be even
cheaper than when BMA was supplying them since the charts will be
generated directly
from the feds database, rather than through Jeppeson as a middleman. Not
that the difference in cost is really a
big deal if charts are available again!
Thanks for any help you can offer.
Message 6
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| Subject: | Solid State Contactors -- SuperSwitch? |
Haven't used these, but they look identical to Teledyne's. $$ to donuts that
the manufacturer is the same.
http://www.futurlec.com/RelSS.shtml
If you are planning on using one of these devices in your airplane, make
sure you purchase the ones for a DC load. Some of the ones for AC load,
require a zero crossing to switch and will not work for DC.
Roger
Message 7
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| Subject: | Solid State Contactors -- SuperSwitch? |
>
>
>If you are planning on using one of these devices in your airplane,
>make sure you purchase the ones for a DC load. Some of the ones for
>AC load, require a zero crossing to switch and will not work for DC.
The device being discussed is offered by an aviation
equipment specialty house as a replacement for contactors
(where bi-directional current flow is needed) and another
version (relay) where uni-directional current flow will
suffice. They are expected to function in a DC power system.
Bob . . .
Message 8
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| Subject: | Re: Z8 scrapped . . . |
nuckolls.bob(at)aeroelect wrote:
>
> ... SNIP
> My recommendations for optimizing Noah's adaptation
> of an SD-20 into his project is replace the SB-1
> regulator with a generic "ford" style regulator,
> add a b-lead contactor to implement fat-wire
> disconnection when parked. Take field power/
> voltage sensing directly from the battery bus
> through a fusible link then to 5A breaker, crowbar
> ovm and then to contactor+regulator bus
> connection. Placard the system against
> simultaneous operation of both alternators.
>
> Bob . . .
Bob, previously I stated my desire to use a standby 30a ER alternator in place
of the SD 8 in Z-13/8. I've been lurking as others, like Noah, pushed the thread.
I have a B&C LR-3 for the main alt and intended to use another one for the standby.
I have a mechanical "either, or" lockout device for the two alternator field
switches. As long as the two systems are mutually exclusive, am I correct
to understand that the prohibition re dual LR-3's, mentioned at the beginning
of your post, no longer applys? And that the suggested mods in the quote above
for Noah's system would not apply to Z-13/8 as I intend to modify it?
Thanks,
John
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=289592#289592
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