Today's Message Index:
----------------------
1. 06:36 AM - Re: Microprocessor based Fuel Gauge Linearizer (Eric M. Jones)
2. 06:39 AM - Re: Z-13 mod'd by David Carter (Robert L. Nuckolls, III)
3. 08:27 AM - Re: Z-13 mod'd by David Carter (David Carter)
4. 11:48 AM - Re: Z-13 mod'd by David Carter (Robert L. Nuckolls, III)
5. 11:53 AM - Re: Microprocessor based Fuel Gauge Linearizer (Wolfgang Trinks)
6. 12:23 PM - Re: Fw: Source for Pins & Extraction tools (Robert L. Nuckolls, III)
7. 05:05 PM - Re: Source for Pins & Extraction tools (Robert L. Nuckolls, III)
8. 06:53 PM - Group ExpressPCB Board Purchase? - EZ-Trim Altitude Hold (Jon Finley)
9. 07:49 PM - 9th Annual Twin Cities RV Forum (Alex Peterson)
10. 09:02 PM - Re: Z-13 mod'd by David Carter (Robert L. Nuckolls, III)
11. 09:25 PM - Source and description of BNC and solder. (Rick Fogerson)
Message 1
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| Subject: | RE: Microprocessor based Fuel Gauge Linearizer |
--> AeroElectric-List message posted by: "Eric M. Jones" <emjones@charter.net>
Welcome back Bob.
There has been a lot of intelligent thought posting on this issue. Stuff of real
value. My feeling from all this is that the ideal would be some stone-simple
and reliable level measurement (even just a single-point) AND a totalizer. I
can't get real excited about the cork on the arm level-sensors.
There's always something new in liquid level sensing. Check these guys--
http://www.merl.com/papers/docs/TR2002-21.pdf Automatic sensing of liquid level in your beer glass in a restaurant!
or just do a Google search on "Liquid Level Sensing". What a dream world we live
in! Amazing!
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge MA 01550-2705
Phone (508) 764-2072
Email: emjones@charter.net
"Better not take a dog on the Space Shuttle, because if he sticks his head out
the window when you're coming home....Oops!.".
Message 2
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| Subject: | Re: Z-13 mod'd by David Carter |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 09:58 PM 5/20/2003 -0500, you wrote:
>--> AeroElectric-List message posted by: "David Carter"
><dcarter@datarecall.net>
>
>Bob,
>
>My file size in My Documents shows 293KB. Also, when I reviewed the email
>with atch that I sent, the e-mail showed the atch as 299KB. I don't have a
>clue why it would show up as as 3 megabyte file.
I'm trying to figure that out. It was the .pdf file that jumped to
2.9 mbyte and took a very long time to compile. My original Z13
is 160 KB, when I print that to a .pdf file it comes out a respectable
124K. When I do a "select all" in the original, I get 850 entities
as reported by AutoCAD.
>About the 1700 entities - I searched Intellicad "Help" and couldn't find how
>to tell how many entities are in my drawing. It should be less than was in
>the Z-13 drawing I started with because I eliminated 2 mags, the "main"
>alternator & VR, a switch, and a few lines. There shouldn't be a big
>difference.
>
>I'll attach the file again. See if it looks more reasonable this time. If
>still goofed up, let me know "off list".
>
>I changed the dwg from "black background" with "white lines" to "white
>backgnd" with "black lines". Would that make a difference?
I'm mystified. What cad program are you using to edit the drawing?
Bob . . .
Message 3
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| Subject: | Re: Z-13 mod'd by David Carter |
--> AeroElectric-List message posted by: "David Carter" <dcarter@datarecall.net>
Bob,
I'm using "Intellicad 2001" as imbedded in AirplanePDQ distributed by Gil
Crouse at
www.davincitechnologies.com>
David
Do not archive
----- Original Message -----
From: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
Subject: Re: AeroElectric-List: Z-13 mod'd by David Carter
> --> AeroElectric-List message posted by: "Robert L. Nuckolls, III"
<bob.nuckolls@cox.net>
>
> At 09:58 PM 5/20/2003 -0500, you wrote:
> >--> AeroElectric-List message posted by: "David Carter"
> ><dcarter@datarecall.net>
> >
> >Bob,
> >
> >My file size in My Documents shows 293KB. Also, when I reviewed the
email
> >with atch that I sent, the e-mail showed the atch as 299KB. I don't
have a
> >clue why it would show up as as 3 megabyte file.
>
> I'm trying to figure that out. It was the .pdf file that jumped to
> 2.9 mbyte and took a very long time to compile. My original Z13
> is 160 KB, when I print that to a .pdf file it comes out a respectable
> 124K. When I do a "select all" in the original, I get 850 entities
> as reported by AutoCAD.
>
>
> >About the 1700 entities - I searched Intellicad "Help" and couldn't find
how
> >to tell how many entities are in my drawing. It should be less than was
in
> >the Z-13 drawing I started with because I eliminated 2 mags, the "main"
> >alternator & VR, a switch, and a few lines. There shouldn't be a big
> >difference.
> >
> >I'll attach the file again. See if it looks more reasonable this time.
If
> >still goofed up, let me know "off list".
> >
> >I changed the dwg from "black background" with "white lines" to "white
> >backgnd" with "black lines". Would that make a difference?
>
> I'm mystified. What cad program are you using to edit the drawing?
>
> Bob . . .
Message 4
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| Subject: | Re: Z-13 mod'd by David Carter |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 10:27 AM 5/21/2003 -0500, you wrote:
>--> AeroElectric-List message posted by: "David Carter"
><dcarter@datarecall.net>
>
>Bob,
>
>I'm using "Intellicad 2001" as imbedded in AirplanePDQ distributed by Gil
>Crouse at
>www.davincitechnologies.com>
>
>David
>
>Do not archive
Hmmm . . . not sure how Intellicad might have hosed
the drawing.
Suggest you try the AutoCAD LT1.0 distributed
on the CD offered from the website or downloadable
at http://216.55.140.222/CD/AEC8_0.zip
Bob . . .
Message 5
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| Subject: | Re: Microprocessor based Fuel Gauge Linearizer |
--> AeroElectric-List message posted by: "Wolfgang Trinks" <Wolfgang.Trinks@flugbereitschaft.com>
----- Original Message -----
From: "Tom Schiff" <tomschiff@attbi.com>
Subject: RE: AeroElectric-List: Microprocessor based Fuel Gauge Linearizer
> --> AeroElectric-List message posted by: "Tom Schiff"
<tomschiff@attbi.com>
>
> I have heard that capacitive gages will not work with Jet-A because
> there is some water dissolved in the fuel which gives it some
> conductivity. You may be able to use insulated sensors.
>
It is true that Jet-A1 has the capability of dissolving a limited amount of
water variing with its temperature. So does gasoline. Espacially AVGAS 100LL
is prone to that effect. This is one of the few drawbacks compared with
automotive fuel and its one of the reasons you have to strain your fuel
system before flight.
But dissolved water in that percentages possible has neglectible effect on
conductivity.
Capacitive fuel storage measurement is the one and only firstclass system
for the time beeing and its the system the vast majority of all jet-A
burning planes carry on board.
But there is a problem with water with some of this systems.
There are systems that do not measure absolute capacity of the probes but
compare it to a reference probe that is also installed in the fuel cell.
This ref-probe must be always submerged in fuel. So it is located on the
lowest position possible. Now if some of this dissolved water falls out of
the fuel due to reachnig the saturation point and collects as pure water it
will also move to this lowest location(its specific density is higher than
the fuels). If this water gets into this ref-capacitor it will srew up the
complete system. If a system has such trouble it either has not been
strained regulary or the strain system is a less than perfect design.
There might be a new kid on the block in a while. I have heard that the car
industry is working on a ultrasonic based system that is sending ultrasonic
sound waves into the fuel and is determing the damping of this sound energy
by the fuel mass contained in the cell.
They also have more and more problems with complex shaped fuel cells.
Wolfgang..
Message 6
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aeroelectric-list@matronics.com
| Subject: | Re: Source for Pins & Extraction tools |
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 10:18 PM 5/20/2003 -0500, you wrote:
>Hi Bob,
>
>I don't know if you missed this post or not, but if you have any ideas I'd
>appreciate it.
>
>Thanks, Paul
I'm not sure but it sounds like you're dealing with the
high-density d-sub connectors. The 20AWG series are found
in MOST places on the back of your computer . . .
except for the video connector which is a 22AWG series
that puts 15 pins higher density into the 9-pin shell
of the lower density.
These are smaller pins do take a smaller extraction tool.
I've tested our 20AWG crimp tool for adequacy of crimp
on 22AWG pins but we don't stock an extraction tool. The
"el cheapo" extractor for these little pins is pretty
flimsy. I don't have a part number for it but there's a
really nice tool with interchangeable tips that handles
both the 20 and 22 AWG pins. It's AMP P/N 91285-1
Do a Google search on the 'net and you'll get a hundred
or so hits on sources/info about this tool.
Bob . . .
Message 7
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aeroelectric-list@matronics.com
| Subject: | Re: Source for Pins & Extraction tools |
<5.0.0.25.2.20030521151305.01278dd0@pop.central.cox.net>
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 05:35 PM 5/21/2003 -0500, you wrote:
>Bob,
>
>The mystery is solved. I went to my avionics shop and he knew what they
>were. They are sockets for D style connectors and they are made by ITT, the
>nose is split and the barrel is very slightly smaller. They will only work
>with the ITT shell..
>
>He had some ITT sockets but he didn't really want to sell them to me, he
>said they we troublesome and he would prefer that I didn't use them. His
>recommendation was to discard the shell and get a new connector that takes
>the conventional sockets.
>
>Cheers, Paul
Oh yeah . . . I remember that. Seems that the shells are shorter
too . . .
I concur with his recommendation. Do you have a local source
for "plain vanilla" shells?
Bob . . .
Message 8
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| Subject: | Group ExpressPCB Board Purchase? - EZ-Trim Altitude |
Hold
--> AeroElectric-List message posted by: "Jon Finley" <jon@finleyweb.net>
Hi all,
I am interesting in building (attempting to build!!) one of Cliff Cady's
Altitude hold units (http://members.aol.com/ccady/eztrim.htm). The
minimum order for these boards from ExpressPCB is 2 (~$45 per board).
I'm wondering if there is enough interest to order a batch of 10 or so
(~$14 per board).
If interested, please send me a message offline (jon@finleyweb.net)
indicating the number of boards you'd like. If enough interest is shown
I will privately contact each of you and get a firm commitment.
Thanks,
Jon Finley
N90MG Q2 - Subaru EJ-22 DD - 440 Hrs. TT - 0 Hrs Engine
Apple Valley, Minnesota
http://www.FinleyWeb.net/default.asp?id=96
Message 9
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| Subject: | 9th Annual Twin Cities RV Forum |
--> AeroElectric-List message posted by: "Alex Peterson" <alexpeterson@usjet.net>
Greetings Listers,
Just a reminder that the 9th Annual Twin Cities RV Forum is just 10 days
away!! Fuel those RV's up and come up to the Minneapolis, Minnesota
area for a day of "RV Heaven". Rumor has it that a batch of RV's will
be coming in from Colorado, which is just a short hop or two from MN.
I'll bet there are some Texas or East Coast or West Coast planes that
want to grab the prize for longest distance. The Forum is May 31st, and
consists of many interesting speakers, vendors, RV's on display, door
prizes and much more. The evening banquet puts the finishing touches on
the day's events - don't miss the interesting evening talk by Bryan
Moon, a renowned MIA hunter who has brought back almost 40 WWII airmen
in many, many expeditions. Be sure to preregister if you plan to attend
the banquet.
For details, see www.rvforum.org.
Alex Peterson
Chairman, Twin Cities RV Forum
17650 82nd Way North
Maple Grove, Minnesota, 55311
612-418-9710
Message 10
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| Subject: | Re: Z-13 mod'd by David Carter |
<5.0.0.25.2.20030521190059.011d98b8@pop.central.cox.net>
--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
At 10:21 PM 5/21/2003 -0500, you wrote:
>Yes, have DSL.
Try starting the CD Rom dowload late at night before
you go to bed. Tell your browser to store it to a directory
on your hard drive (right click the link) instead of letting
it try to work with the incoming file. The total file size
is about 200 Megabytes.
>What do you want me to do next? I was thinking of downloading Z13 from your
>site again and NOT changing backgnd from black to white (and lines from
>white to black) and just send it back and see it if will process through
>Adobe to a reasonable pdg file.
> - Maybe you could quickly try that same thing from your end - fresh
>download to hard drive, then process out thru Adobe to pdf and see if any
>glitches in original file that we all download.
We're getting the cart in front of the horse. Let's
not struggle with software integration issues until
we deduce what's bothering you about the details
of any of the architectures as published.
There's a lot we can do with words and grandpa's
PAD (pencil aided design) system and safe the
byte thrashing until you have a plan.
Bob . . .
Message 11
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| Subject: | Source and description of BNC and solder. |
--> AeroElectric-List message posted by: "Rick Fogerson" <rickf@cableone.net>
Does anyone know of a source for solder type BNC connectors? My local Radio Shack
only had screw type and crimp type.
Solder: I have some "60/40 rosin core" type soldier. I suppose this stuff is
not recommended for electronics. If not, what should I get and where?
Thanks,
Rick Fogerson
RV3 finish kit
Boise, ID
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