Today's Message Index:
----------------------
1. 03:39 AM - NOT airplane related-digital phone sevice (Dale Ensing)
2. 05:17 AM - Re: NOT airplane related-digital phone sevice (Robert L. Nuckolls, III)
3. 05:32 AM - Re: A simple ECU (Ken)
4. 05:53 AM - Homemade 1/4 wave TSPD antenna (rtitsworth)
5. 07:49 AM - Re: Strobes - Light Plane Maintenance Article (Eric M. Jones)
6. 08:10 AM - Re: NOT airplane related-digital phone sevice (B Tomm)
7. 09:06 AM - Re: NOT airplane related-digital phone sevice (Matt Prather)
8. 10:41 AM - Rotax electrical switches (Les Goldner)
9. 12:04 PM - Re: Rotax electrical switches (Michael Ice)
10. 02:50 PM - Re: A simple ECU (Peter Harris)
11. 03:17 PM - Re: A simple ECU (mikef)
12. 05:25 PM - Re: NOT airplane related-digital phone sevice (MauleDriver)
13. 09:09 PM - Re: Re: A simple ECU (Peter Harris)
Message 1
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Subject: | NOT airplane related-digital phone sevice |
Forgive me for using this forum but its the best source I could think
of.......
Interested in opinions on why digital phone service from the cable TV
company might be better than service from the old phone company.?
Dale Ensing
DO NOT ARCHIVE
Message 2
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Subject: | Re: NOT airplane related-digital phone sevice |
At 06:37 AM 8/28/2007 -0400, you wrote:
>"urn:schemas-microsoft-com:office:office" xmlns:w =
>"urn:schemas-microsoft-com:office:word" xmlns:st1 =
>"urn:schemas-microsoft-com:office:smarttags">
>Forgive me for using this forum but its the best source I could think
>of.......
>
>Interested in opinions on why digital phone service from the cable TV
>company might be better than service from the old phone company.?
>Dale Ensing
>DO NOT ARCHIVE
If the product performs as expected, then there is no
"better" or "worse" to be considered. We have an integrated
Cable-Internet-Phone service here and for all practical purposes,
there has been no observable degradation or enhancement of
phone service. One thing to consider is the fact that all
your communication comes in and goes out on one wire. A
single point of vulnerability/failure for the whole apple
cart.
But after about 2 years of using this service, I'm unaware
of any feature or performance issues that would suggest
that the change was not a good thing to do.
In some respects, going the all-eggs-in-one basket
approach will put greater market pressures on the
service providers to enhance the scope of services
offered. I.e, the day is coming that they'll bring
a glass fiber into the back of your house (or perhaps
offer a wireless broadband LAN) with greatly expanded
capabilities. This probably wouldn't happen so fast
(if at all) if we still had multiple providers with
a mix of transmission technologies.
I take that back. There IS a noticeable difference
albeit a tiny one. When we get a lot of rain, the 40+
year old telco hard wires get wet and you get some
crosstalk between subscriber lines and some AC hum.
The buried coax with RF multiplexing is not vulnerable
to this condition.
Bob . . .
Message 3
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Subject: | Re: A simple ECU |
Peter
Google "megasquirt efi" for an under $200. system and lots of related info.
Not recommended for aviation of course but I run one as a manually
selectable backup to my main subaru efi.
I have mine configured with the inputs that you describe and it is fine
for my purposes. For everyday use it would benefit from connecting a TPS
(throttle position sensor) acceleration enrichment, or one could run the
code that enriches based on delta MAP. A water temp (cylinder or oil
temp for you) sensor would also be handy for starting and warmup but I
don't use mine for startup. There are some schemes for doing this with
analog electronics but the megasquirt is definately the way to do it
nowadays and about as simple as I could find. I have a manual mixture
tweaking knob but it is not needed (especially if one has an engine emp
sensor) and if it isn't there - it can't fail. I use an old 486 laptop
for programming.
If you are only going to have a primary controller I'd suggest googling
SDS EFI. That would most likely require re-arranging your flywheel
pickups but it would have "established" reliability. I think there are
thousands of megaquirt units in use but each is somewhat different and
subject to unique failures. Megasquirt has very little capability of
keeping the engine running after a sensor or wire failure compared to
oem or even the SDS system.
Ken
Peter Harris wrote:
>
>
> I am in the process of installing a simple TBI system to the Jabiru
> 3300. Just two injectors in a spigot type throttle body which takes
> the place of the Bing, it works from a MAP sensor and air temp sensor,
> the ECU is triggered from the flywheel magnets. We are using a regular
> automotive ECU which is a giant overkill and very expensive.
>
> We can trim the mixture using a pot if required.
>
> My question is has anyone seen a simple programmable unit that could
> be programmed with a pot, a switch and a digital dial. The programming
> would be done by select injector time and enter as required. We would
> keep the manual over ride.
>
> What would be the elements of such a simple ECU ? Any idea where I
> could get some help would be appreciated.
>
> Thanks
>
> Peter H
>
>
Message 4
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Subject: | Homemade 1/4 wave TSPD antenna |
Bob,
Thanks for the reply to my last msg (1/4 Wave Comm Ant). A follow-up...
I am contemplating putting a 1/4 wave TSPD antenna on the belly of a
composite aircraft, directly under the pilot seat. In chapter 13 of the
Connection you talk about making the ground plane 5.5" dia to keep it
resonant.
>From a health standpoint, does 5.5" effectively shield the pilot (and
co-pilot) - i.e. keep all the radiated energy below horizontal, or should I
do something else.
Options:
a. Make the ground plane bigger (but I can only get to about 13" diameter).
b. Make a second, larger shield slightly above the ground plane and not
connected to it.
Rick
Message 5
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Subject: | Re: Strobes - Light Plane Maintenance Article |
Check--http://industrial.rell.com/pdfs/IPG_AN_appguide.pdf
Excerpt from above:
"Aluminum electrolytic capacitors stored for more than 5 to
10 years may have increased levels of DC leakage current.
Check if DCL meets application requirements before placing
in service. Recondition high DCL units by applying
rated voltage through 1,000 ohm resistor for 30 minutes.
Shelf life is a measure of how the capacitors will withstand
storage for long times especially at high temperature. To
test shelf life place the capacitors in an oven set to the
shelf-life test temperature 0 +3 C for the shelf-life test
period. Upon completion of the test stabilize the capacitors
at 25 C for 24 h or more. Apply the rated voltage for 30
minutes, then verify the post test limits. Unless otherwise
specified the capacitance, DCL and ESR will meet initial
requirements."
--------
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge, MA 01550
(508) 764-2072
emjones@charter.net
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=131345#131345
Message 6
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Subject: | NOT airplane related-digital phone sevice |
I would add that the cable based phone service needs local AC power to work.
They usually use a UPS for standby power should the power go out. But this
standby time will be limited by the capacity and condition of the back up.
The old style phone service is not dependant on AC power at the premises.
Bevan
RV7A
wiring
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Robert L.
Nuckolls, III
Sent: Tuesday, August 28, 2007 6:19 AM
Subject: Re: AeroElectric-List: NOT airplane related-digital phone sevice
--> <nuckollsr@cox.net>
At 06:37 AM 8/28/2007 -0400, you wrote:
>"urn:schemas-microsoft-com:office:office" xmlns:w =
>"urn:schemas-microsoft-com:office:word" xmlns:st1 =
>"urn:schemas-microsoft-com:office:smarttags">
>Forgive me for using this forum but its the best source I could think
>of.......
>
>Interested in opinions on why digital phone service from the cable TV
>company might be better than service from the old phone company.?
>Dale Ensing
>DO NOT ARCHIVE
If the product performs as expected, then there is no
"better" or "worse" to be considered. We have an integrated
Cable-Internet-Phone service here and for all practical purposes,
there has been no observable degradation or enhancement of
phone service. One thing to consider is the fact that all
your communication comes in and goes out on one wire. A
single point of vulnerability/failure for the whole apple
cart.
But after about 2 years of using this service, I'm unaware
of any feature or performance issues that would suggest
that the change was not a good thing to do.
In some respects, going the all-eggs-in-one basket
approach will put greater market pressures on the
service providers to enhance the scope of services
offered. I.e, the day is coming that they'll bring
a glass fiber into the back of your house (or perhaps
offer a wireless broadband LAN) with greatly expanded
capabilities. This probably wouldn't happen so fast
(if at all) if we still had multiple providers with
a mix of transmission technologies.
I take that back. There IS a noticeable difference
albeit a tiny one. When we get a lot of rain, the 40+
year old telco hard wires get wet and you get some
crosstalk between subscriber lines and some AC hum.
The buried coax with RF multiplexing is not vulnerable
to this condition.
Bob . . .
Message 7
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Subject: | Re: NOT airplane related-digital phone sevice |
Interesting observations Bob.
One other thing I have noticed while talking (conferencing) with my family
in SoCal and Japan is that Skype running on my laptop has better voice
quality (perceived bandwidth) than using landlines or cell phones. PC-PC
is best, and any combination of "phone" is not as good. There also seems
to be less overall delay on Skype to Japan.
Regards,
Matt-
> <nuckollsr@cox.net>
>
> At 06:37 AM 8/28/2007 -0400, you wrote:
>
>>"urn:schemas-microsoft-com:office:office" xmlns:w
>>"urn:schemas-microsoft-com:office:word" xmlns:st1
>>"urn:schemas-microsoft-com:office:smarttags">
>>Forgive me for using this forum but its the best source I could think
>>of.......
>>
>>Interested in opinions on why digital phone service from the cable TV
>>company might be better than service from the old phone company.?
>>Dale Ensing
>>DO NOT ARCHIVE
>
> If the product performs as expected, then there is no
> "better" or "worse" to be considered. We have an integrated
> Cable-Internet-Phone service here and for all practical purposes,
> there has been no observable degradation or enhancement of
> phone service. One thing to consider is the fact that all
> your communication comes in and goes out on one wire. A
> single point of vulnerability/failure for the whole apple
> cart.
>
> But after about 2 years of using this service, I'm unaware
> of any feature or performance issues that would suggest
> that the change was not a good thing to do.
>
> In some respects, going the all-eggs-in-one basket
> approach will put greater market pressures on the
> service providers to enhance the scope of services
> offered. I.e, the day is coming that they'll bring
> a glass fiber into the back of your house (or perhaps
> offer a wireless broadband LAN) with greatly expanded
> capabilities. This probably wouldn't happen so fast
> (if at all) if we still had multiple providers with
> a mix of transmission technologies.
>
> I take that back. There IS a noticeable difference
> albeit a tiny one. When we get a lot of rain, the 40+
> year old telco hard wires get wet and you get some
> crosstalk between subscriber lines and some AC hum.
> The buried coax with RF multiplexing is not vulnerable
> to this condition.
>
> Bob . . .
>
>
Message 8
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Subject: | Rotax electrical switches |
I am building my Zenith 701/Rotax 912 electrical system following
Aeroelectric's Z16 diagram because I trust that Bob Nuckolls knows a hell of
a lot more about aircraft electrical systems than I do. I don't even know
enough to fully understand the use of the two switches in the diagram. I
would appreciate if Bob or someone who understands this diagram can tell me
how to use switch S1 (the double poll double throw switch) and the switch
attached to the endurance buss. I also need to understand what type of
switch this second one is. It looks like a single poll on-off type but I'm
not certain because it has a "^" symbol in it.
Thanks for the help,
Les
Message 9
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Subject: | Re: Rotax electrical switches |
Les,
If you don't have Bob's book buy it. If you do then read the chapter on switches
about 5 times. That is the number I am up to and I think I am about to "get
it".
Good luck,
Mike
----- Original Message -----
From: Les Goldner <lgold@quantum-associates.com>
Subject: AeroElectric-List: Rotax electrical switches
> I am building my Zenith 701/Rotax 912 electrical system following
> Aeroelectric's Z16 diagram because I trust that Bob Nuckolls knows
> a hell of
> a lot more about aircraft electrical systems than I do. I don't
> even know
> enough to fully understand the use of the two switches in the
> diagram. I
> would appreciate if Bob or someone who understands this diagram
> can tell me
> how to use switch S1 (the double poll double throw switch) and the
> switchattached to the endurance buss. I also need to understand
> what type of
> switch this second one is. It looks like a single poll on-off type
> but I'm
> not certain because it has a "^" symbol in it.
>
> Thanks for the help,
> Les
>
>
>
Message 10
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|
Thanks Ken I had not checked the price of Megasquirt it is cheaper than I
expected. I guess I am interested in making something like the EC2 series
from Real World Solutions, but will take a closer look at the Megasquirt.
Peter
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Ken
Sent: Tuesday, 28 August 2007 10:35 PM
Subject: Re: AeroElectric-List: A simple ECU
Peter
Google "megasquirt efi" for an under $200. system and lots of related info.
Not recommended for aviation of course but I run one as a manually
selectable backup to my main subaru efi.
I have mine configured with the inputs that you describe and it is fine
for my purposes. For everyday use it would benefit from connecting a TPS
(throttle position sensor) acceleration enrichment, or one could run the
code that enriches based on delta MAP. A water temp (cylinder or oil
temp for you) sensor would also be handy for starting and warmup but I
don't use mine for startup. There are some schemes for doing this with
analog electronics but the megasquirt is definately the way to do it
nowadays and about as simple as I could find. I have a manual mixture
tweaking knob but it is not needed (especially if one has an engine emp
sensor) and if it isn't there - it can't fail. I use an old 486 laptop
for programming.
If you are only going to have a primary controller I'd suggest googling
SDS EFI. That would most likely require re-arranging your flywheel
pickups but it would have "established" reliability. I think there are
thousands of megaquirt units in use but each is somewhat different and
subject to unique failures. Megasquirt has very little capability of
keeping the engine running after a sensor or wire failure compared to
oem or even the SDS system.
Ken
Peter Harris wrote:
>
>
> I am in the process of installing a simple TBI system to the Jabiru
> 3300. Just two injectors in a spigot type throttle body which takes
> the place of the Bing, it works from a MAP sensor and air temp sensor,
> the ECU is triggered from the flywheel magnets. We are using a regular
> automotive ECU which is a giant overkill and very expensive.
>
> We can trim the mixture using a pot if required.
>
> My question is has anyone seen a simple programmable unit that could
> be programmed with a pot, a switch and a digital dial. The programming
> would be done by select injector time and enter as required. We would
> keep the manual over ride.
>
> What would be the elements of such a simple ECU ? Any idea where I
> could get some help would be appreciated.
>
> Thanks
>
> Peter H
>
>
Message 11
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Subject: | Re: A simple ECU |
Peter,
>>I guess I am interested in making something like the EC2 series
from Real World Solutions, but will take a closer look at the Megasquirt.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=131469#131469
Message 12
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Subject: | Re: NOT airplane related-digital phone sevice |
I have both a regular Telco phone line and digital phone service from
the cable TV company and can make two observations after 2 years of dual
service:
1) Having 1 line of each type appears to be better than having both of
the same type (see Z-14)
2) The differences are very local and specific to the actual physical
characteristics of the wire installation. In other words, I can not
point to any service qualities that are intrinsic to the providers or
the technologies.
Some experiences:
- the Telco line has been down 3 times in 2 years. One was a "local
switch" problem and the other 2 were inadvertant cuts to the buried
line on my property. The (also buried) cable line was not effected so a
level of service was maintained.
- My data service to the cable modem has 'burped' several times but the
phone service thru the same device was maintained.
- A power surge from a thunderstorm took a computer and the cable modem
down. Though it took a day to get everything back up, the digital phone
service was in place in the time it took the modem to reboot. with no
further action required.
- I have cross-talk between the 2 lines just as I had before switching
one line to digital. The problem apparently caused by house wiring.
- I use the two lines interchangeably to make and receive a variety of
calls. I can perceive no difference in quality or anything else.
Interestingly, the clearest sounding international call I have ever
recieved was from a US cellphone roaming in Beijing... and received on
my cellphone. Go figure.
I've found the digital phone service surprisingly solid and have no
qualms about using it exclusively. Both providers seem pretty
motivated right now so service has been very responsive in both cases.
Bill "trying to wire my RV10 with a Z-14" Watson
do not archive
Dale Ensing wrote:
> Forgive me for using this forum but its the best source I could think
> of.......
>
> Interested in opinions on why digital phone service from the cable TV
> company might be better than service from the old phone company.?
> Dale Ensing
> DO NOT ARCHIVE
Message 13
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Subject: | Re: A simple ECU |
Mike at this stage I am gathering information. There is a lot I like about
the EC2 but I would like to do it myself and cheaper.
Peter
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of mikef
Sent: Wednesday, 29 August 2007 8:17 AM
Subject: AeroElectric-List: Re: A simple ECU
Peter,
>>I guess I am interested in making something like the EC2 series
from Real World Solutions, but will take a closer look at the Megasquirt.
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=131469#131469
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