Today's Message Index:
----------------------
1. 12:19 AM - Fw: Vacuum regulator (j1j2h3@juno.com)
2. 06:46 AM - Re: Alternator Wiring (Neil Clayton)
3. 09:05 AM - Dielectric grease recommendations (David A. Leonard)
4. 10:07 AM - Re: Dielectric grease recommendations (Robert L. Nuckolls, III)
5. 10:08 AM - Re: Alternator Wiring (Jim Jewell)
6. 10:35 AM - Re: less expensive power supply with (william mills)
7. 10:48 AM - Re: Alternator Wiring (Robert L. Nuckolls, III)
8. 12:11 PM - Oil alarm design (Gilles.Thesee)
9. 01:21 PM - Re: Dielectric grease recommendations (Gkb5577@aol.com)
10. 02:12 PM - Re: rg 142 or 400, which is best (CardinalNSB@aol.com)
11. 03:59 PM - Re: Re: rg 142 or 400, which is best (Robert L. Nuckolls, III)
12. 04:20 PM - Re: Alternator Wiring (Robert L. Nuckolls, III)
13. 04:21 PM - Re: Dielectric grease recommendations (Eric M. Jones)
14. 04:25 PM - Re: B&C 20 amp vac pad failure, Pictures Link has Changed (Robert L. Nuckolls, III)
15. 04:38 PM - Link changes (Robert L. Nuckolls, III)
16. 05:06 PM - Re: Dielectric grease recommendations (DWENSING@aol.com)
17. 05:21 PM - Garmin 430 wiring problem (mstewart@qa.butler.com)
18. 07:22 PM - Re: Alternator Wiring (Jim Sower)
19. 07:42 PM - Re: Dielectric grease recommendations (Jim Jewell)
20. 08:08 PM - Re: Alternator Pulley Size (Robert L. Nuckolls, III)
21. 08:12 PM - "Plenum" rated CAT5 cable (Robinson, Chad)
22. 08:59 PM - Re: Garmin 430 wiring problem (Robert L. Nuckolls, III)
23. 09:01 PM - Re: amphenol connectors (Hey Mike!!!) (Robert L. Nuckolls, III)
24. 09:19 PM - Re: Re: B&C 20 amp vac pad failure, Pictures L (George Braly)
25. 10:52 PM - Re: Re: B&C 20 amp vac pad failure, (Robert L. Nuckolls, III)
26. 10:53 PM - Re: "Plenum" rated CAT5 cable (Robert L. Nuckolls, III)
Message 1
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| Subject: | Fw: Vacuum regulator |
--> AeroElectric-List message posted by: j1j2h3@juno.com
Does anyone who is converting their system to all-electric have a vacuum
regulator for sale (cheap)?
Jim Hasper - RV-7 just starting empennage (setting up shop in Franklin,
TN)
Do not archive
Message 2
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| Subject: | Re: Alternator Wiring |
--> AeroElectric-List message posted by: Neil Clayton <harvey4@earthlink.net>
Spruce sells a 4", "V" pulley. Page 245, $48.95.
Check the ID
Neil
At 03:47 AM 9/27/03, you wrote:
>--> AeroElectric-List message posted by: "Neil Henderson"
><neil.mo51@btopenworld.com>
>
>Listers
>
>I have obtained an almost new Nipon Denzo alternator off a Toyota which I
>intend fitting to a Lyco320 In my RV9.
>I have a couple of questions. Firstly I assume it's internally regulated
>although it has a 3 wire socket, what are the 3 connections for and is a
>mating plug readily available. Van's sell one that looks as if fits.
>Secondly it is currently fitted with a flat belt pulley which I need to
>change this to a V belt. I seem to recall Bob Avery used to sell a larger
>dia pulley, is this worth considering and if not could anyone direct me to
>source of standard sized pulleys.
>
>Thanks for your help.
>
>Neil Henderson RV9-A n/r Aylesbury UK
>
>
Message 3
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| Subject: | Dielectric grease recommendations |
--> AeroElectric-List message posted by: "David A. Leonard" <dleonar1@maine.rr.com>
Group, could someone shed a little light on what kind of grease to use for
connections..This from my Bellanca Viking group, discussing the use of
grease on the starter supply wiring connections from the group:
--- In VikingChat@yahoogroups.com, "David A. Leonard"
<dleonar1@m...> wrote:
> ....Now you are halfway there. Find the ground wire from the
engine back to the mount, remove and clean both ends of the ground
wire or strap, grease and securely re-connect.
ir
>Dave -- I assume you mean generic grease, like wheel bearing
>grease. I remember learning somewhere that silicone grease is
>better for this purpose. Can you or someone else confirm or dispute
>this call?
I wrote:
You are correct sir!
The grease I use comes from NAPA, it is produced(or labeled) by Echlin, who
is an aftermarket supplier of electrical components. The label suggests
using it on Ford high tension ignition harness components.. in the
distributor cap, under the plug wire boots.
You can also find it called "di-electric" grease.
I am not sure if it is exactly the right stuff to use..I think that the
function is to exclude air and moisture to stop corrosion from occurring.
I have honestly used all kinds of different greases on battery terminals
and ligh bulb bases over the years, with good results.
I'll ask the
http://www.matronics.com/digest/aeroelectric-list/Digest.AeroElectric-List.2003-09-27.html
guys, no doubt these gurus will have an informed opinion. They refer to
connections properly made as being "gas-tight".
David Leonard N77FE
Message 4
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| Subject: | Re: Dielectric grease recommendations |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 12:01 PM 9/28/2003 -0400, you wrote:
>--> AeroElectric-List message posted by: "David A. Leonard"
><dleonar1@maine.rr.com>
>
>
>Group, could someone shed a little light on what kind of grease to use for
>connections..This from my Bellanca Viking group, discussing the use of
>grease on the starter supply wiring connections from the group:
>
>--- In VikingChat@yahoogroups.com, "David A. Leonard"
><dleonar1@m...> wrote:
<snip>
My personal favorite for such applications is
Dow Corning DC-4 . . . a silicon based grease
with the consistency of peanut butter.
See:
http://www.skygeek.com/dowcordc4eli.html
http://www.seabird.com/pdf_documents/msds_sheets/dc4.pdf
Prices for this stuff can be all over the map. Shop
around . . . A tube will last you a lifetime. My
6 oz. tube is 40 years old and only half gone.
Bob . . .
--------------------------------------------
( Knowing about a thing is different than )
( understanding it. One can know a lot )
( and still understand nothing. )
( C.F. Kettering )
--------------------------------------------
Message 5
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| Subject: | Re: Alternator Wiring |
--> AeroElectric-List message posted by: "Jim Jewell" <jjewell@telus.net>
Hello Neil,
Keep in mind that the clearance between the cowling and the larger diameter
pulleys can be a nuisance factor.
Four inch would be a bit too large on my setup for an O360. On your O320
your distance might vary.
There is a lot of info in the archives re-larger pulleys and alternator
speed. I think the main concern would be too low voltage output at idle.
Jim in Kelowna
.----- Original Message -----
From: "Neil Clayton" <harvey4@earthlink.net>
Subject: Re: AeroElectric-List: Alternator Wiring
> --> AeroElectric-List message posted by: Neil Clayton
<harvey4@earthlink.net>
>
> Spruce sells a 4", "V" pulley. Page 245, $48.95.
> Check the ID
> Neil
>
>
> At 03:47 AM 9/27/03, you wrote:
> >--> AeroElectric-List message posted by: "Neil Henderson"
> ><neil.mo51@btopenworld.com>
> >
> >Listers
> >
> >I have obtained an almost new Nipon Denzo alternator off a Toyota which I
> >intend fitting to a Lyco320 In my RV9.
> >I have a couple of questions. Firstly I assume it's internally regulated
> >although it has a 3 wire socket, what are the 3 connections for and is a
> >mating plug readily available. Van's sell one that looks as if fits.
> >Secondly it is currently fitted with a flat belt pulley which I need to
> >change this to a V belt. I seem to recall Bob Avery used to sell a larger
> >dia pulley, is this worth considering and if not could anyone direct me
to
> >source of standard sized pulleys.
> >
> >Thanks for your help.
> >
> >Neil Henderson RV9-A n/r Aylesbury UK
> >
> >
>
>
Message 6
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| Subject: | Re: less expensive power supply with |
Aeroflash heads
--> AeroElectric-List message posted by: william mills <courierboy@earthlink.net>
>--> AeroElectric-List message posted by: Neil Clayton <harvey4@earthlink.net>
>
>Mark....thanks for your interesting post. I saved your mail with the intent
>of researching the references you cite at the RV archives. But I can't find
>anything. I expect it's not the RV-8 list that I know about, but some
>other. I need this info since I'm doing my strobe research now. Could you
>point me where I can read everything you refer to?
>
>Thanks
>Neil
Neil -
Try this:
Go to: http://www.matronics.com/archives/
Click on RV8
Select "A" (from ABCDEF)
Click on "Open Search Engine"
Type "beer budget" (without quotes) in "Search String" box and click
on "Begin Search" box
You will see Mark's posts
Good luck -
Bill
do not archive
Message 7
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| Subject: | Re: Alternator Wiring |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 09:44 AM 9/28/2003 -0400, you wrote:
>--> AeroElectric-List message posted by: Neil Clayton <harvey4@earthlink.net>
>
>Spruce sells a 4", "V" pulley. Page 245, $48.95.
>Check the ID
>Neil
I'd look for a relatively small pulley. Have
your alternator's rotor balanced and spin it fast.
One of the big advantages of an alternator is
an ability to get useful output power at ramp and
taxi engine speeds.
A number of builders have been advised to increase
pulley size to slow it down thus improving on bearing
life . . . indeed this will probably make a poorly
balanced rotor, or marginal bearings last longer
but . . .
B&C has been selling the ND alternators for
about 20 years. They get balanced and they leave
the factory with a small pulley. Wearout rates
on these machines are phenomenally low while
performance on the ground is as good as it gets.
There are some OBAM aircraft that get into
cowl clearance issues with larger pulleys . . .
watch out for this too.
Bob . . .
Message 8
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| Subject: | Oil alarm design |
--> AeroElectric-List message posted by: "Gilles.Thesee" <Gilles.Thesee@ac-grenoble.fr>
Hi Bob and all,
Could anyone help me to design a simple circuit ? The idea is to turn on an
idiot light every time the voltage from an oil pressure sensor is below a
certain (ajustable) threshold.
The sender output is 0.5 to 4.5 volts.
Digging around I scribbled something with an op amp and a 2N4400 transistor,
but I'm not sure about which wire goes to which pin.
Any advice or schematics appreciated.
Thank you
Gilles
Message 9
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| Subject: | Re: Dielectric grease recommendations |
--> AeroElectric-List message posted by: Gkb5577@aol.com
I'm new to the forum. I just got some dielectric grease off Ebay--3 tubes (
big ones) for about $20. I'm curious too can bearing grease work? The idea
must have started some time ago with an old-timer and I JUST BET that the type
actually isn't all that important. (?????) Geoff
Message 10
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| Subject: | Re: rg 142 or 400, which is best |
--> AeroElectric-List message posted by: CardinalNSB@aol.com
I understand FAA requires 142 or 400 coax now, whichis "best", thanks, Skip
Simpson
Message 11
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| Subject: | Re: rg 142 or 400, which is best |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 05:12 PM 9/28/2003 -0400, you wrote:
>--> AeroElectric-List message posted by: CardinalNSB@aol.com
>
>I understand FAA requires 142 or 400 coax now, whichis "best", thanks, Skip
>Simpson
The FAA doesn't require any particular coaxial cable, there
are only general requirements as to what materials are
allowed on board in the tireless quest for ever improved
safety. There are lots of coaxes that would meet these
requirements. Having said that, RG400 and RG142 are both
members of a family of modern coaxial cables and either
is fine. RG400 has a stranded center conductor, RG142 has
a solid center conductor. The choice is yours.
Bob . . .
Message 12
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| Subject: | Re: Alternator Wiring |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 08:47 AM 9/27/2003 +0100, you wrote:
>--> AeroElectric-List message posted by: "Neil Henderson"
><neil.mo51@btopenworld.com>
>
>Listers
>
>I have obtained an almost new Nipon Denzo alternator off a Toyota which I
>intend fitting to a Lyco320 In my RV9.
>I have a couple of questions. Firstly I assume it's internally regulated
>although it has a 3 wire socket, what are the 3 connections for and is a
>mating plug readily available. Van's sell one that looks as if fits.
You only need to attach to one of the three terminals
and a 1/4" faston terminal works good. Are there any
labels adjacent to the terminals?
Bob . . .
Message 13
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| Subject: | Re: Dielectric grease recommendations |
--> AeroElectric-List message posted by: "Eric M. Jones" <emjones@charter.net>
Years ago my dad and I used to fix Stryker bone tools that would gum up in
sterilization. Stryker sold fancy grease but it would rapidly get gummy.
While searching for the right grease, a Mobil lubrication engineer said,
"Did you ever consider what a miracle wheel-bearing grease is? Mobil put
almost as much money into wheel-bearing grease research as the Manhattan
Project put into the A-bomb. Now you can buy a can for a couple of bucks.
Now THAT'S a miracle."
We bought the grease. Problem solved and a valuable lesson learned.
For the grease-before-crimp: Almost ANYTHING will do. Linseed oil...pine
tar...molasses...loctite.
Regards,
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge MA 01550-2705
Phone (508) 764-2072
Email: emjones@charter.net
Message 14
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| Subject: | Re: B&C 20 amp vac pad failure, Pictures Link has Changed |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 09:42 AM 9/26/2003 -0500, you wrote:
>--> AeroElectric-List message posted by: "Robert L. Nuckolls, III"
><bob.nuckolls@cox.net>
>
>At 09:14 AM 9/23/2003 -0700, you wrote:
> >--> AeroElectric-List message posted by: richard@riley.net
> >
> >I'm looking for someplace on the web to stash them - if anyone has a
> >suggestion, let me know. Preferably someplace that you don't have to join
> >to access
>
>
> The pictures can be viewed at:
http://www.aeroelectric.com/Pictures/SD-20A.jpg
http://www.aeroelectric.com/Pictures/SD-20B.jpg
> PRELIMINARY investigation suggests that (1) there are
> no casting flaws and (2) that in this particular case,
> there was not a single crack but a series of three
> independent failures for each of the three corners
> that broke off . . . the 4th had been overstressed and
> broke off with relatively low force bending applied with
> pliers.
>
> Let's be cautious with loose speculation . . . keep
> in mind that thousands of these alternators are in
> service over a service history of 9 years or better.
> There have been only three casting failures reported
> to B&C over this period of time.
>
> There is a working hypothesis as to root cause
> which will be developed and either confirmed or rejected.
> This is a high priority investigation and the results
> will be posted here and reported to the FAA as soon
> as credible data are available.
>
> Bob . . .
Message 15
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--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
I'm not sure why it happens but on some links to my website,
Netscape captures the location as an IP based address
as opposed to a domain name based address. Hence, may
of the links I've published over the last two years have
the IP address 216.55.140.222 and a link might look like:
http://216.55.140.222/temp/Switches.pdf
When you encounter such a reference in the archives,
you can simply substitute the characters "aeroelectric.com"
for the string "216.55.140.222" and it should take you
to the new server.
Bob . . .
--------------------------------------------
( Knowing about a thing is different than )
( understanding it. One can know a lot )
( and still understand nothing. )
( C.F. Kettering )
--------------------------------------------
Message 16
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| Subject: | Re: Dielectric grease recommendations |
--> AeroElectric-List message posted by: DWENSING@aol.com
In a message dated 9/28/03 1:08:47 PM Eastern Daylight Time,
bob.nuckolls@cox.net writes:
> My personal favorite for such applications is
> Dow Corning DC-4 . . . a silicon based grease
> with the consistency of peanut butter.
>
> Prices for this stuff can be all over the map. Shop
> around . . . A tube will last you a lifetime. My
> 6 oz. tube is 40 years old and only half gone.
>
Try a bearing supply house. Their price will probably be better than
the electrical supply places or aviation. Use to sell the stuff before I
retired.
Dale Ensing
Message 17
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| Subject: | Garmin 430 wiring problem |
--> AeroElectric-List message posted by: mstewart@qa.butler.com
I am installing my Garmin 430. It was pre-wired, meaning connectors are
wired with wires hanging out and labeled. I can not find any wires labled
gps data out. I have d/l the pinouts from AE's site and none of the
connectors seems to have this designation. I am trying to drive my Navaid
with the 430 gps. I surely hope that this thing has a gps data out. Do they
call it something different?
Thanks
Mike Stewart
Message 18
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| Subject: | Re: Alternator Wiring |
--> AeroElectric-List message posted by: Jim Sower <canarder@frontiernet.net>
I had the same problem - serpentine pulley on the alternator, V-belt in the
airplane. I walked into the nearest alternator rebuild shop and walked out with
a pulley for $15. Could have gotten a bigger one if I'd waited for them to order
it.
Works for me .... Jim S.
Neil Clayton wrote:
> --> AeroElectric-List message posted by: Neil Clayton <harvey4@earthlink.net>
>
> Spruce sells a 4", "V" pulley. Page 245, $48.95.
> Check the ID
> Neil
>
> At 03:47 AM 9/27/03, you wrote:
> >--> AeroElectric-List message posted by: "Neil Henderson"
> ><neil.mo51@btopenworld.com>
> >
> >Listers
> >
> >I have obtained an almost new Nipon Denzo alternator off a Toyota which I
> >intend fitting to a Lyco320 In my RV9.
> >I have a couple of questions. Firstly I assume it's internally regulated
> >although it has a 3 wire socket, what are the 3 connections for and is a
> >mating plug readily available. Van's sell one that looks as if fits.
> >Secondly it is currently fitted with a flat belt pulley which I need to
> >change this to a V belt. I seem to recall Bob Avery used to sell a larger
> >dia pulley, is this worth considering and if not could anyone direct me to
> >source of standard sized pulleys.
> >
> >Thanks for your help.
> >
> >Neil Henderson RV9-A n/r Aylesbury UK
> >
> >
>
--
Jim Sower
Crossville, TN; Chapter 5
Long-EZ N83RT, Velocity N4095T
Message 19
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| Subject: | Re: Dielectric grease recommendations |
--> AeroElectric-List message posted by: "Jim Jewell" <jjewell@telus.net>
Hi David,
Various companies package a dielectric Grease. the tube I have in front of
me is a 'Pematex' product that I bought at a local auto supply outlet.It is
labeled "Dielectric Tune-up Grease". The No. 22064 is at the bottom of the
tube
It is commonly used on spark plug ceramics and wire boots to stop them from
bonding in place as well as water proofing them.
This grease has a high content of silicone that will keep water and
contaminants away very effectively. It will not easily melt and run off or
evaporate.
Although is referred to as grease, it is not intended as a mechanical
assembly lubricant or bearing grease.
I used it at all the ground wire junctions etc.
Jim in Kelowna
----- Original Message -----
From: "David A. Leonard" <dleonar1@maine.rr.com>
Subject: AeroElectric-List: Dielectric grease recommendations
> --> AeroElectric-List message posted by: "David A. Leonard"
<dleonar1@maine.rr.com>
>
>
> Group, could someone shed a little light on what kind of grease to use for
> connections..This from my Bellanca Viking group, discussing the use of
> grease on the starter supply wiring connections from the group:
>
> --- In VikingChat@yahoogroups.com, "David A. Leonard"
> <dleonar1@m...> wrote:
>
> > ....Now you are halfway there. Find the ground wire from the
> engine back to the mount, remove and clean both ends of the ground
> wire or strap, grease and securely re-connect.
> ir
>
> >Dave -- I assume you mean generic grease, like wheel bearing
> >grease. I remember learning somewhere that silicone grease is
> >better for this purpose. Can you or someone else confirm or dispute
> >this call?
>
> I wrote:
>
> You are correct sir!
>
> The grease I use comes from NAPA, it is produced(or labeled) by Echlin,
who
> is an aftermarket supplier of electrical components. The label suggests
> using it on Ford high tension ignition harness components.. in the
> distributor cap, under the plug wire boots.
>
> You can also find it called "di-electric" grease.
>
> I am not sure if it is exactly the right stuff to use..I think that the
> function is to exclude air and moisture to stop corrosion from occurring.
>
> I have honestly used all kinds of different greases on battery terminals
> and ligh bulb bases over the years, with good results.
>
> I'll ask the
>
http://www.matronics.com/digest/aeroelectric-list/Digest.AeroElectric-List.2003-09-27.html
> guys, no doubt these gurus will have an informed opinion. They refer to
> connections properly made as being "gas-tight".
>
>
> David Leonard N77FE
>
>
Message 20
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| Subject: | Re: Alternator Pulley Size |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
>Hi Bob....something you wrote regarding alternator pulley sizes caused me
>the stop and think;
>
>My ND alternator puts out something like 70A at 10,000 revs. There's no
>way I'd ever need that output for my Cozy, so I thought I'd reduce the RPM
>by sizing up the pulley and maybe save the bearing life a little into the
>bargain. And philosophically, I had an aversion to anything rotating at
>10k rev under my hood.
The B&C ND alternators have always run well with a rather
small pulley . . . I think it's about 2.5" diam. Belt
driven from the starter ring gear on a Lyc, they cruise
routinely at over 10K . . . given the way rotors are
constructed (forged) combined with their small diameter
makes 10K a no-big-deal.
>But your post made me wonder if there's some low RMP cut off, and that I
>might not get power from the alternator during taxi. I had stupidly
>assumed the output is linear all the way down.
Alternators have two critical speed characteristics.
Minimum speed for regulation: The RPM at which the
alternator just puts out 14 volts but at zero current.
Minimum speed for full output: The RPM at which the
alternator will deliver rated output current at max
operating temperature. Check out the drawing at
http://aeroelectric.com/temp/80A_OutCurve.gif
Here we see that minimum speed for regulation is
about 1000 rpm for this exemplar 80A machine.
Minimum speed for full output is about 6000
rpm. This would be typical of most automotive
machines.
Bottom line is that if you have low voltage
warning light and the light never comes on, your
alternator is carrying system loads of the moment
irrespective of its ratings or pulley size.
Bob . . .
Message 21
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| Subject: | "Plenum" rated CAT5 cable |
--> AeroElectric-List message posted by: "Robinson, Chad" <crobinson@rfgonline.com>
Bob, I'd be interested in your impression of "plenum" rated CATn cables (5 and
6). I used to install miles of this stuff at a previous job, and it seems it had
similar properties to what people look for in Tefzel. Obviously, I'm talking
about signal wires here, not power carriers, mainly for things like carrying
trim signals, indicator light runs, etc.
Upon some reinvestigation I've found that the better quality stuff has teflon for
its core insulation and some unspecified, but not PVC outer jacket. (It's usually
listed as a flame-retardant polymer designed to char, rather than melting,
not carry a flame from one space to another (hence its use in plenums) and
also not produce toxic fumes (likewise)).
I have a few areas where it would be nice to be able to install more than the 2-3
conductor multi-conductor stuff usually available, such as through B&C or ACSpruce.
Moreover, I also happen to have a few hundred feet left over, so if it's
at all suitable / acceptable, I'd like to use it up where I can.
Regards,
Chad
Message 22
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| Subject: | Re: Garmin 430 wiring problem |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 08:21 PM 9/28/2003 -0400, you wrote:
>--> AeroElectric-List message posted by: mstewart@qa.butler.com
>
>I am installing my Garmin 430. It was pre-wired, meaning connectors are
>wired with wires hanging out and labeled. I can not find any wires labled
>gps data out. I have d/l the pinouts from AE's site and none of the
>connectors seems to have this designation. I am trying to drive my Navaid
>with the 430 gps. I surely hope that this thing has a gps data out. Do they
>call it something different?
>Thanks
>Mike Stewart
shuckypoo . . . I did a 430 installation in the AGATE Bonanza
a a couple of years ago and had a copy of the complete installation
manual from Garmin. Dug around in the archives and couldn't put
my hands on it. I probably gave it back to the folks at RAC.
Sorry.
Bob . . .
Message 23
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| Subject: | Re: amphenol connectors (Hey Mike!!!) |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 09:25 AM 9/26/2003 -0500, you wrote:
>--> AeroElectric-List message posted by: "Robert L. Nuckolls, III"
><bob.nuckolls@cox.net>
>
>At 07:06 AM 9/26/2003 -0400, you wrote:
> >--> AeroElectric-List message posted by: "Jones, Michael" <MJones@hatch.ca>
> >
> >hi all
> >
> >I have the amphenol connectors for my electric gyros but don't know how to
> >attach wires to the amphenol connectors. Are the wires soldered or do I need
> >some kind of female pin to attach to the wire then insert this female pin
> >into the back of the connector.
> >thanx for the help guys
Mike, did you see my post on this topic. Can you give me some
numbers off your connector(s) and/or photos?
Bob . . .
Message 24
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| Subject: | Re: B&C 20 amp vac pad failure, Pictures L |
ink has Changed
--> AeroElectric-List message posted by: George Braly <gwbraly@gami.com>
Bob,
Can you tell us what the working hypothesis is as to the root cause?
Regards, George
-----Original Message-----
From: Robert L. Nuckolls, III [mailto:bob.nuckolls@cox.net]
Subject: AeroElectric-List: Re: B&C 20 amp vac pad failure, Pictures
Link has Changed
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III"
<bob.nuckolls@cox.net>
At 09:42 AM 9/26/2003 -0500, you wrote:
>--> AeroElectric-List message posted by: "Robert L. Nuckolls, III"
><bob.nuckolls@cox.net>
>
>At 09:14 AM 9/23/2003 -0700, you wrote:
> >--> AeroElectric-List message posted by: richard@riley.net
> >
> >I'm looking for someplace on the web to stash them - if anyone has a
> >suggestion, let me know. Preferably someplace that you don't have to
join
> >to access
>
>
> The pictures can be viewed at:
http://www.aeroelectric.com/Pictures/SD-20A.jpg
http://www.aeroelectric.com/Pictures/SD-20B.jpg
> PRELIMINARY investigation suggests that (1) there are
> no casting flaws and (2) that in this particular case,
> there was not a single crack but a series of three
> independent failures for each of the three corners
> that broke off . . . the 4th had been overstressed and
> broke off with relatively low force bending applied with
> pliers.
>
> Let's be cautious with loose speculation . . . keep
> in mind that thousands of these alternators are in
> service over a service history of 9 years or better.
> There have been only three casting failures reported
> to B&C over this period of time.
>
> There is a working hypothesis as to root cause
> which will be developed and either confirmed or rejected.
> This is a high priority investigation and the results
> will be posted here and reported to the FAA as soon
> as credible data are available.
>
> Bob . . .
Message 25
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| Subject: | Re: B&C 20 amp vac pad failure, |
Pictures L ink has Changed
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 11:19 PM 9/28/2003 -0500, you wrote:
>--> AeroElectric-List message posted by: George Braly <gwbraly@gami.com>
>
>
>Bob,
>
>Can you tell us what the working hypothesis is as to the root cause?
>
>Regards, George
sure . . . this wasn't a single crack event . . . each of
the four mounting ears was independently overstressed. Each
parted the rest of the alternator individually. The
initial examination of the fractures shows no casting flaws.
The remaining ear was close to failure. It broke off with
a pair of pliers and hand-generated bending stresses.
We think the bolts were tightened down too tight and gasket
thickness was reduced enough to bow the flange and put an
abnormal bending load on the ears.
If it were my airplane, I'd pitch the paper gasket and
use a suitable brush-on gasket replacement material that
would extrude out and avoid bending loads by getting the
two machined flats to lay right against each other.
This is only failure of the type for this product for
several thousand installations. Although this event
transpired on an experimental airplane, it's the same
alternator as the STC/PMA installations . . . they're
going to do a full investigation and report for the FAA.
We'll post the final analysis results here on the AEList.
Bob . . .
Message 26
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| Subject: | Re: "Plenum" rated CAT5 cable |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 11:12 PM 9/28/2003 -0400, you wrote:
>--> AeroElectric-List message posted by: "Robinson, Chad"
><crobinson@rfgonline.com>
>
>Bob, I'd be interested in your impression of "plenum" rated CATn cables (5
>and 6). I used to install miles of this stuff at a previous job, and it
>seems it had similar properties to what people look for in Tefzel.
>Obviously, I'm talking about signal wires here, not power carriers, mainly
>for things like carrying trim signals, indicator light runs, etc.
>
>Upon some reinvestigation I've found that the better quality stuff has
>teflon for its core insulation and some unspecified, but not PVC outer
>jacket. (It's usually listed as a flame-retardant polymer designed to
>char, rather than melting, not carry a flame from one space to another
>(hence its use in plenums) and also not produce toxic fumes (likewise)).
>
>I have a few areas where it would be nice to be able to install more than
>the 2-3 conductor multi-conductor stuff usually available, such as through
>B&C or ACSpruce. Moreover, I also happen to have a few hundred feet left
>over, so if it's at all suitable / acceptable, I'd like to use it up where
>I can.
Not too worried about insulation . . . that's just really
small, single strand wire. I think I'd vote for 19-strand,
22AWG, over 26AWG cat-5 cable strands any day.
Bob . . .
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