Today's Message Index:
----------------------
1. 11:00 AM - Re: Re: One Noisy Mag (Robert L. Nuckolls, III)
2. 02:57 PM - Z-13/8 inline fuse ()
3. 07:35 PM - Fw: current outstanding questions (Keith Ward)
4. 07:45 PM - Warning - New Bose Line Power Cables Only 3' Long! (Matt Dralle)
5. 07:46 PM - Re: One Noisy Mag (user9253)
6. 09:14 PM - Re: Fw: current outstanding questions (Robert L. Nuckolls, III)
7. 09:16 PM - Re: Z-13/8 inline fuse (Robert L. Nuckolls, III)
Message 1
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| Subject: | Re: One Noisy Mag |
At 12:04 AM 8/13/2011, you wrote:
>
>Hi Bob,
>
>That was it - I swapped the mag filters and now I have a noisy right
>hand mag and a quiet left hand one. Don't know why I didn't think
>of that, though they're not all that old. Must have had a dud right
>out of the box because it's always been like that and I installed
>those filters about five years ago, but... that happens
>sometimes. Thanks for the help - sure appreciate it.
Pleased to be of service. You were getting close
by yourself. The detective work was on point.
Bob . . .
Message 2
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| Subject: | Z-13/8 inline fuse |
Bob,
I noticed that the latest revision of Z-13/8 calls out a 30 amp inline fuse between
the battery contactor and the SD-8. In a previous post I found an explanation
for the change, but am wondering what type of device would be used. A fuse
holder with a couple of loose leads for an automotive type fuse or a firewall
mounted single pole fuse holder with a small, round fuse. Any recommendations
or supplier P/N appreciated.
Tom Barter
Avid Magnum - wiring
Message 3
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| Subject: | Fwd: current outstanding questions |
> Here are a few questions from my buddy who is building an RV-10 and will be using
Z13/8 for his all electric panel. He is trying to use zero or as few circuit
breakers on the panel as possible. He will be using fuse blocks for the
main and endurance buses, so most of the usual CBs will not be needed.
Questions:
> 1. "ALT FLD" wire protection z13/8: can that be a fuse or does it need to be
a circuit breaker on the panel?
> 2. Is it feasible to think someone could react fast enough on run away trim scenario
to pull the circuit breaker before it ran its full course? If not - use
fuse instead of CB?
> 3. In z13/8, Can both shunts be hooked up to one ammeter? Would the shunt attached
to the SD8 alternator indicate a load even if the aux alt switch was off?
Suggestions for best way to proceed with only one ammeter?
> 4.If your goal was to minimize as many warning lights, switches, and CBs on the
panel, what would your short list be of these items to remain? Using Dynon
Skyview that will be booted up prior to start-up that will have plenty of warnings
to display.
Thanks for the input.
Keith
Message 4
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| Subject: | Warning - New Bose Line Power Cables Only 3' Long! |
Just a heads up to those installing or planning on installing Bose X or A20 Active
NR headsets using the inline power jacks. Specifically these units:
http://www.bose.com/controller?url=/shop_online/headphones/aviation_headsets/accessories/headset_installkit_acc.jsp
They now come with only 3 feet of cable! Three years ago they came with 6 feet
of cable and I thought at the time that 6 feet seemed a little short. Now 3
feet? What idiot penny pincher in Bose marketing decided "three feet should be
plenty". Here's quote from the Bose web page above: "Three-foot wiring harness
with six pin female connector allows for *placement in locations throughout
aircraft*." WTF? On what planet will a 3-foot hardness reach "locations throughout
the aircraft". That's just plain stupid.
If these were third rate, el-cheapo headsets, I'd write it off to penny pinching,
but for a >$1000 product that you then have to spend an additional $32 for
an installation cable, cheaping out on the cable length is just simply unacceptable.
I have the jacks mounted in the center of the RV-8, and the cables don't even reach
to the righthand control console. What does Bose expect people to do; splice
the wire? That's ridiculous! What would somebody installing in the back
seats of a 4 or 6 place airplane do?
Of course I wrote a scathing email to Bose Support just now. I'm sure they will
write back with "for most of our customers, three feet is sufficient".
Given this direction within Bose, I'd definitely consider the new Sennheiser S1
if I had to do it over again. Additionally, the Sennheiser's Bluetooth supports
the A2DP, AVRCP STEREO profiles. The Bose A20's Bluetooth does NOT support
stereo. It must have been the same marketing moron that dictated 3' cables
that decided not to include stereo Bluetooth profiles. Unbelievable.
Matt
-
Matt "Red Dawg" Dralle
RV-8 #82880 N998RV "Ruby Vixen"
http://www.mattsrv8.com - Matt's Complete RV-8 Construction Log
http://www.mattsrv8.com/Mishap - Landing Mishap Rebuild Log
http://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV YouTube Channel
Status: 170+ Hours TTSN - Rebuilding Fuselage After Landing Mishap...
Message 5
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| Subject: | Re: One Noisy Mag |
> Checking the mag switch (AAF A-7 type) I found that the shields were also grounded
at the switch. "Aha!" says I. "exactly what Bob said never to do." So I
reached in with a pair of side cutters and cut the connections to the shields
Some magneto switches have a terminal labeled GND to which the shields are attached.
This GND terminal is not an actual airframe ground. The shields need to
be connected to this terminal in order for the switch to short out the P leads.
The mag switch operation should be verified to be sure there is not an always
hot mag.
Joe
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=349351#349351
Message 6
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| Subject: | Re: Fwd: current outstanding questions |
At 09:31 PM 8/13/2011, you wrote:
>
>
> > Here are a few questions from my buddy who is building an RV-10
> and will be using Z13/8 for his all electric panel. He is trying
> to use zero or as few circuit breakers on the panel as
> possible. He will be using fuse blocks for the main and endurance
> buses, so most of the usual CBs will not be needed.
>
>Questions:
> > 1. "ALT FLD" wire protection z13/8: can that be a fuse or does it
> need to be a circuit breaker on the panel?
If he is using crowbar ov protection, a CB is
called for . . .
> > 2. Is it feasible to think someone could react fast enough on run
> away trim scenario to pull the circuit breaker before it ran its
> full course? If not - use fuse instead of CB?
No
>
> > 3. In z13/8, Can both shunts be hooked up to one ammeter? Would
> the shunt attached to the SD8 alternator indicate a load even if
> the aux alt switch was off? Suggestions for best way to proceed
> with only one ammeter?
Put it on the SD-8 only. That's the one
most useful for shedding loads in flight.
You're never going to overload the main
alternator.
> > 4.If your goal was to minimize as many warning lights, switches,
> and CBs on the panel, what would your short list be of these items
> to remain? Using Dynon Skyview that will be booted up prior to
> start-up that will have plenty of warnings to display.
"Plenty" ought to be enough. I've been flying in TC
aircraft for over 60 years that have zero 'warnings'.
They have gages that give you the big picture and
for nearly a century, it has been quite sufficient
to let the pilot do the pilot-thing and be aware
of the big picture.
Engines and other systems have only become more
reliable over the years while digital instrumentation
has offered us ways to raise flags, flash lights,
sound alarms and otherwise lull us to sleep in
a cockpit that makes less demands.
If you've got an electro-whizzy with warning
features not included on a 1980 A-36 Bonanza,
I suspect that will be "plenty".
Bob . . .
////
(o o)
===========o00o=(_)=o00o========
< Go ahead, make my day . . . >
< show me where I'm wrong. >
================================
Message 7
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| Subject: | Re: Z-13/8 inline fuse |
At 04:53 PM 8/13/2011, you wrote:
>
>Bob,
>
>I noticed that the latest revision of Z-13/8 calls out a 30 amp
>inline fuse between the battery contactor and the SD-8. In a
>previous post I found an explanation for the change, but am
>wondering what type of device would be used. A fuse holder with a
>couple of loose leads for an automotive type fuse or a firewall
>mounted single pole fuse holder with a small, round fuse. Any
>recommendations or supplier P/N appreciated.
NO GLASS CARTRIDGE FUSES. Use the MAX30
and companion holder available from any
parts store.
http://aeroelectric.com/Pictures/Fuses/Fuses/maxi.gif
http://aeroelectric.com/Pictures/Fuses/Fuse_Holders/MaxiFuse_Holder.jpg
Bob . . .
////
(o o)
===========o00o=(_)=o00o========
< Go ahead, make my day . . . >
< show me where I'm wrong. >
================================
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