Today's Message Index:
----------------------
1. 08:14 AM - Re: Z-19 Function (Ed meyer)
2. 09:03 AM - Re: Z-19 Function (Robert L. Nuckolls, III)
3. 09:11 AM - KX165 transmit light stuck (Radioflyer)
4. 09:26 AM - Re: Z-19 Function (Robert L. Nuckolls, III)
5. 11:09 AM - Re: KX165 transmit light stuck (Robert L. Nuckolls, III)
6. 11:30 AM - Re: Z-19 Function (Justin Jones)
7. 01:14 PM - Re: Z-19 Function (Robert L. Nuckolls, III)
8. 01:53 PM - Re: Z-19 Function (Justin Jones)
9. 03:27 PM - Re: KX165 transmit light stuck (Radioflyer)
10. 07:53 PM - Re: Re: KX165 transmit light stuck (Robert L. Nuckolls, III)
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: | Re: Z-19 Function |
I have been following this discussion with great interest since I am
strongly considering using the EFII system on my project. I had also
pretty much zeroed in on the Z13/8 electrical system. The one thing that
the EFII Bus Manager has that I think would be desirable is the
automatic fuel pump switching if the primary pump fails. I imagine that
function would not be too difficult to add to Z13/8 with some sort of a
pressure switch but I am not smart enough to know what switch and the
most =98elegant=99 way to wire it.
Ed
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: | Re: Z-19 Function |
At 11:17 PM 8/20/2014, you wrote:
>
>Hardly load shedding with a full EFIS system/GPS/mapping/engine
>moniter and electronic ignition system burning way less than 8 amps
>from the SD8 as long as there is gas in the tanks....If it comes to that...
Very good. 20 years ago the idea of running
a full-up panel, electronic ignition and
fuel injection on a 110 watt energy budget
would probably have produced snickers from
the peanut gallery . . . but guess what?
You're there.
Z-13/8 offers a 3-layered architecture
that will (1) run everything plus the kitchen
sink if the main alternator is up, (2) run
everything you'd like to have on the SD-8 if the
big guy takes a vacation and with proper
battery sizing and maintenance (3) run
everything NECESSARY to terminate the flight
comfortably battery only . . . not under emergency
conditions that dictate the lights will go
out in 30 minutes.
This happy situation did not arise from the
directed efforts of any one activity . . . in
fact, the musings and experiments here on
the List contributed little to the advancement
of our art. The List is an aggregator of
ideas . . . a kind of kitchen where chefs
sifting through an ever changing supermarket
of ingredients searching out the most pleasing
recipe for success. Those ingredients come from
EVERYWHERE . . .
The earliest efforts of Lightspeed and Unison
ignition products might today seem amusing to
individuals who do not know their history
their stories . . . products that were birthed by
individuals with an idea and willingness to
take a risk . . . one bombed . . . the other
has matured greatly. Complexity has gone down,
robustness is up, energy is down, cost of
ownership is down, weight is down. Along
comes EFII . . . with perhaps the next generation
of product evolution with still better numbers
particularly in the arena of ENERGY.
The rate of evolution for good recipes is retarded
first by the distance over which the ingredients
are dispersed and then by suppression of
opportunity for experimentation in the development
of new recipes. Check out the biography of
a pencil by Leonard Read
http://tinyurl.com/me3q3hj
This fun little story speaks to the MILLIONS of
individuals, few of whom know each other, who
contribute to the crafting of a simple pencil.
It's this same spontaneous organization of millions
of experimenters and suppliers offering their own
ingredients to our 'kitchens' where we strive to produce
the best-we-know-how-to-do in airplanes.
Bob . . .
The universe runs on PHYSICS. All of mankind's
endeavors in any venue distills to but two
studies: properties of materials and management
of energy.
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: | KX165 transmit light stuck |
I've been troubleshooting my intercom system and radio operation and eventually
found one of the mic jacks had tangs that were bent and touching. After unbending
the tangs, the intercom system worked, but the radio seems to be stuck on
transmit. I pulled the radio out of the plane, isolated from all associated
devices, powered it up and the "T" light is constantly on.
So, it's a radio problem. The radio is actually putting out a weak signal, but
no voice. However, if I activate the PTT switch, it will transmit clearly. Nevertheless,
can't receive because the T stays on. Could the shorted mic input have
caused this fault? Can anyone give some advise on how to remedy, besides going
straight to the avionics shop?
--Jose
Ps-I've pulled the manuals Bob N. No clues, yet.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=429003#429003
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: Z-19 Function |
At 10:13 AM 8/21/2014, you wrote:
I have been following this discussion with great
interest since I am strongly considering using
the EFII system on my project. I had also pretty
much zeroed in on the Z13/8 electrical system.
The one thing that the EFII Bus Manager has that
I think would be desirable is the automatic fuel
pump switching if the primary pump fails. I
imagine that function would not be too difficult
to add to Z13/8 with some sort of a pressure
switch but I am not smart enough to know what
switch and the most =98elegant=99 way to wire it.
Ed
Why automatic? Describe the flight configuration
under which such a system would benefit you as
a pilot.
Just about every airplane I've flown has two fuel
pumps. For the most part, BOTH are ON for take-off
and approach to landing. Above some altitude that
offers plenty of time for recognition and response
to failure of the main pump, the secondary pump
is turned OFF and held in reserve.
99.9% of all failures of an engine to produce
power is caused by fuel starvation. The engine generally
doesn't stop cold. From the first time you sense
a change in engine operation until the time that
the secondary pump switch can be thrown is a few
seconds at most.
There have been dozens of designs offered for
automatic switching of backup hardware in aviation
over the years. Some worked pretty good. The vast
majority would not be asked to do their task even
once over the lifetime of the airplane.
Yet all such systems adds to weight, cost and
complexity . . . with reliability ramifications
of their own.
My cursory examination of the EFII installation
suggest that two switches for two pumps. One from
the battery bus, the other from the main bus.
This offers reliability with simplicity that will
not get 'better' with any form of automation.
Bob . . .
Message 5
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: KX165 transmit light stuck |
At 11:10 AM 8/21/2014, you wrote:
I've been troubleshooting my intercom system and radio operation and
eventually found one of the mic jacks had tangs that were bent and
touching. After unbending the tangs, the intercom system worked, but
the radio seems to be stuck on transmit. I pulled the radio out of
the plane, isolated from all associated devices, powered it up and
the "T" light is constantly on.
So, it's a radio problem. The radio is actually putting out a weak
signal, but no voice. However, if I activate the PTT switch, it will
transmit clearly. Nevertheless, can't receive because the T stays on.
Could the shorted mic input have caused this fault? Can anyone give
some advise on how to remedy, besides going straight to the avionics shop?
--Jose
Ps-I've pulled the manuals Bob N. No clues, yet.
Doesn't sound good. In the service manual, Figure 6-8
sheet 5 of 11 we find this excerpt of the PTT input
circuit . . .
Emacs!
It seems likely that your difficulty lies in or somewhere close
to either side of this bit of circuitry.
Bob . . .
Message 6
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: Z-19 Function |
Bob,
I just heard back from Robert about the EFII power demands on the 12v system. Here
is what he said.
The ECUs draw only about .1 amps ea.
The ignition coils draw about 2.3 amps ea at high rpm, but they have much higher
peak currents, hence the 10A breaker. The peak currents occur for only a few
milliseconds.
The fuel pump draws a little under 5A (one pump running).
Does this help?
Thank you!
Justin
On Aug 20, 2014, at 19:29, "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
wrote:
>
> At 08:23 PM 8/20/2014, you wrote:
>>
>> I too have Robert's EFII's dual electronic ignition (which has been great so
far!) on my RV7.
>
> Were you offered any more documentation than the
> down-loadable 'installation manuals' we've been
> praying over?
>
>
>> I didn't start out with this mindset, but with an electrically dependent ignition
system and electrically dependent EFIS systems the only architecture that
made sense was Bob's Z13/8. I simply hooked 1 ECU and coil to the EBUS and the
other ECU and Coil to the Batt Bus.
>
> Yup . . . that works.
>
> I'd probably put 1/2 the equipment on the
> battery bus and the other half on the main bus.
> During alternator-out operations, you load-shed
> half of the engine support . . .which is readily
> available by simply turning the master switch back
> on. The only time this would be necessary is if
> you suffered DUAL failures of pretty good hardware
> in any single tank full of fuel . . . exceedingly
> unlikely.
>
>> I believe Bob challenges you to find a better designed system than the examples
in the aeroelectric connection . . .
>
> Sure. The Z-figures didn't start finding their way
> into the book until about Rev 4 or so. They marched
> up to Z-10 getting refined as we went. Somewhere
> along the line, I dumped Z-1 thru Z-10 in favor of
> a total replacement that began with Z-11. I wanted
> to set the older iterations aside. As new figures
> are added, I'll fill in the numbers below Z-11.
>
> But you're right. Unlike our brothers flying the
> TC Iron, we're free to EVOLVE architectures in
> the quest for the elegant solution and TAILOR
> architectures to the airplane/mission.
>
>> I couldn't be happier with the idiot proof redundancy of the electrical architecture
Bob gave us in Z13/8.
>
> You guys (or at least your predecessors) on
> the List played major roles in the development
> of the Z-figures. It's called, "Spontaneous
> order in the free market exchange of value."
> Works good every time it's tried. With few exceptions,
> I believe Z-13/8 offers system reliability
> that equals or exceeds that offered to many
> pilots of TC twins . . . but at a tiny fraction
> of the cost and complexity.
>
> What we've accomplished here is something for
> which the OBAM aviation community can be proud.
> Proven recipes for success driven NOT not by
> the nightmares of bureaucratic worriers but
> by the quest for an elegant solution. Andy's
> endorsement is a validation of that idea.
> Thank you sir!
>
>
> Bob . . .
>
>
>
>
Message 7
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: Z-19 Function |
At 01:28 PM 8/21/2014, you wrote:
><jmjones2000@mindspring.com>
>
>Bob,
>
>I just heard back from Robert about the EFII power demands on the
>12v system. Here is what he said.
>
>The ECUs draw only about .1 amps ea.
>The ignition coils draw about 2.3 amps ea at high rpm, but they have
>much higher peak currents, hence the 10A breaker. The peak currents
>occur for only a few milliseconds.
>The fuel pump draws a little under 5A (one pump running).
>
>Does this help?
Very close. Is he sending you a ship's wiring
diagram for a dual ECU system?
Bob . . .
Message 8
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: Z-19 Function |
That's all he sent me. The pictures in the installation diagram list all of the
connections made to the efii system and these numbers show the amount of current
the system draws. He does suggest using his "bus manager" which has a diagram
on how to hook it up to a ship's system.
On Aug 21, 2014, at 12:13, "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
wrote:
>
> At 01:28 PM 8/21/2014, you wrote:
>>
>> Bob,
>>
>> I just heard back from Robert about the EFII power demands on the 12v system.
Here is what he said.
>>
>> The ECUs draw only about .1 amps ea.
>> The ignition coils draw about 2.3 amps ea at high rpm, but they have much higher
peak currents, hence the 10A breaker. The peak currents occur for only a
few milliseconds.
>> The fuel pump draws a little under 5A (one pump running).
>>
>> Does this help?
>
> Very close. Is he sending you a ship's wiring
> diagram for a dual ECU system?
>
>
>
> Bob . . .
>
>
>
>
Message 9
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: KX165 transmit light stuck |
Hmmm. I was about to look more deeply into the circuitry when frustration truly
hit (the radio). Hit it with a bigger hammer, as they say. Well thinking there
might be a relay somewhere in the unit, I gave it a sharp tap and the the T
went away! Now, I can receive. The T does come back on only when the mic is keyed,
as it should. Have to still test for actual voice transmission, but so far
all looks good. Funny, though that the mic key circuit has no relays, though.
--Jose
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=429036#429036
Message 10
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: KX165 transmit light stuck |
At 05:26 PM 8/21/2014, you wrote:
>
>Hmmm. I was about to look more deeply into the circuitry when
>frustration truly hit (the radio). Hit it with a bigger hammer, as
>they say. Well thinking there might be a relay somewhere in the
>unit, I gave it a sharp tap and the the T went away! Now, I can
>receive. The T does come back on only when the mic is keyed, as it
>should. Have to still test for actual voice transmission, but so far
>all looks good. Funny, though that the mic key circuit has no relays, though.
>--Jose
Yup, that went all solid state a few years back.
It's a whole new ball game . . .
Bob . . .
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! --
|