AeroElectric-List Digest Archive

Tue 03/04/03


Total Messages Posted: 24



Today's Message Index:
----------------------
 
     1. 02:24 AM - Wingtip VHF antenna in carbon fiber airplane (gilles.thesee)
     2. 05:39 AM - Re: Noise & Wire Routing (MikeEasley@aol.com)
     3. 05:41 AM - Re: New Feature on aeroelectric.com (John Schroeder)
     4. 06:29 AM - Re: New Feature on aeroelectric.com (Freddie Freeloader)
     5. 06:51 AM - Re: LED nav lights (Mark Phillips)
     6. 07:12 AM - Re: LED nav lights (Werner Schneider)
     7. 07:35 AM - Re: New Feature on aeroelectric.com (James E. Clark)
     8. 07:37 AM - Re: Radio Wiring question (Vince Ackerman)
     9. 08:42 AM - Re: Need Help Understanding the electrical Diagram?  (Julia)
    10. 08:50 AM - aec7_1.zip (Bob Kuc)
    11. 09:04 AM - Re: New Feature on aeroelectric.com (Jerzy Krasinski)
    12. 09:07 AM - Re: Aerial spacing requirements (Neville Kilford)
    13. 09:20 AM - Re: New Feature on aeroelectric.com (Bruce Gray)
    14. 01:55 PM - switch mounting nuts (Robert Dickson)
    15. 03:18 PM - Re: switch mounting nuts (Robert L. Nuckolls, III)
    16. 03:23 PM - Re: New Feature on aeroelectric.com (Robert L. Nuckolls, III)
    17. 04:04 PM - Calling Paul Bowmar . . . (Robert L. Nuckolls, III)
    18. 04:54 PM - Re: New Feature on aeroelectric.com (Robert McCallum)
    19. 06:07 PM - Re: LED nav lights  (Eric M. Jones)
    20. 06:22 PM - Firewall penetrations for wires . . . (Eric M. Jones)
    21. 07:20 PM - Re: Firewall penetrations for wires . . . (David Carter)
    22. 08:00 PM - Re: Firewall penetrations for wires . . . (Robert L. Nuckolls, III)
    23. 08:01 PM - Re: New Feature on aeroelectric.com (Jerzy Krasinski)
    24. 08:32 PM - Re: Firewall penetrations for wires . . . (John Slade)
 
 
 


Message 1


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    Time: 02:24:28 AM PST US
    From: "gilles.thesee" <Gilles.Thesee@ac-grenoble.fr>
    Subject: Wingtip VHF antenna in carbon fiber airplane
    --> AeroElectric-List message posted by: "gilles.thesee" <Gilles.Thesee@ac-grenoble.fr> Hi Bob and all, We're building a carbon fiber kit. We would like to install the VHF antenna in one of the glass fiber wingtips. The wingtip shape is similar to a large 'horn' with a sweeping curve from horizontal at the end of the wing, to vertical. In my opinion, the antenna in itself should not be much of a problem, but what about the ground plane ? The curved form of the wingtip may provide a very odd form for the conductive strips. Maybe I could send Bob a photo of the wingtip to clarify things. Any advice ? Thanks, Gilles


    Message 2


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    Time: 05:39:06 AM PST US
    From: MikeEasley@aol.com
    Subject: Re: Noise & Wire Routing
    --> AeroElectric-List message posted by: MikeEasley@aol.com Lancairs have been running the wingtip strobe and nav antenna cables through a 1" conduit for years, haven't heard of any real problems. Most guys use RG58U. That's almost 15' of parallel contact.


    Message 3


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    Time: 05:41:30 AM PST US
    From: John Schroeder <jschroeder@perigee.net>
    Subject: Re: New Feature on aeroelectric.com
    --> AeroElectric-List message posted by: John Schroeder <jschroeder@perigee.net> Bob: I downloaded the new version of the CD in 20 min. and averaged about 105 kb/s. I used Opera as the browser and it worked fine. John DO NOT ARCHIVE


    Message 4


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    Time: 06:29:20 AM PST US
    From: Freddie Freeloader <lists@stevet.net>
    Subject: Re: New Feature on aeroelectric.com
    --> AeroElectric-List message posted by: Freddie Freeloader <lists@stevet.net> Hello Robert, Monday, March 3, 2003, 9:46:22 PM, you wrote: -->> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net> <<snip>> RLNI> Also, the latest CD_Rom has been uploaded to RLNI> http://www.aeroelectric.com/CD/AEC7_1.zip RLNI> Would be interested in getting feedback from folks RLNI> who have successfully downloaded and unpacked the RLNI> latest edition. RLNI> Thanks! RLNI> Bob . . . I downloaded and unzipped just fine. Download speed was intermittent but I got the whole thing in 6 minutes. Using Mozilla 1.2.1 browser and WinRAR to unpack on a Cox cable modem. Looks real good. Thanks so much for all you do, Bob. -- Best regards, Freddie mailto:lists@stevet.net


    Message 5


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    Time: 06:51:25 AM PST US
    From: Mark Phillips <ripsteel@edge.net>
    Subject: Re: LED nav lights
    --> AeroElectric-List message posted by: Mark Phillips <ripsteel@edge.net> Hi Eric- could not find "builders aids" on your website- is there something else to navigate through? Mark - do not archive - "Eric M. Jones" wrote: > For a (simple) engineering discussion of using LEDs in Nav lights and how to calculate the basics, see my website www.PerihelionDesign.com under Builders Aids. >


    Message 6


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    Time: 07:12:22 AM PST US
    From: "Werner Schneider" <wernerschneider@compuserve.com>
    Subject: Re: LED nav lights
    --> AeroElectric-List message posted by: "Werner Schneider" <wernerschneider@compuserve.com> scroll down Misc Aids & Tales ----- Original Message ----- From: "Mark Phillips" <ripsteel@edge.net> Subject: Re: AeroElectric-List: LED nav lights > --> AeroElectric-List message posted by: Mark Phillips <ripsteel@edge.net> > > Hi Eric- could not find "builders aids" on your website- is there something else to navigate through? > > Mark - do not archive - > > "Eric M. Jones" wrote: > > > For a (simple) engineering discussion of using LEDs in Nav lights and how to calculate the basics, see my website www.PerihelionDesign.com under Builders Aids. > > > >


    Message 7


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    Time: 07:35:57 AM PST US
    From: "James E. Clark" <jclark@conterra.com>
    Subject: New Feature on aeroelectric.com
    --> AeroElectric-List message posted by: "James E. Clark" <jclark@conterra.com> Was able to download. Just clicked on the URL. Took about 12 minutes I think (RoadRunner Cable modem) UNZIP seems to have worked. James > -----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, March 04, 2003 12:46 AM > To: aeroelectric-list@matronics.com > Subject: AeroElectric-List: New Feature on aeroelectric.com > > > --> AeroElectric-List message posted by: "Robert L. Nuckolls, > III" <bob.nuckolls@cox.net> > > Over the years, I've been able to supply a number of > pin-out diagrams for some of the golden oldie radios > and a few of the newer ones as well. I've placed a > compendium of recent requests on: > > http://www.aeroelectric.com/Installation_Data > > If you don't find what you need there at any time, drop > me a note and I'll see if I can add your request to > the archive. This is a permanent addition to the > website. > > Also, the latest CD_Rom has been uploaded to > > http://www.aeroelectric.com/CD/AEC7_1.zip > > > Would be interested in getting feedback from folks > who have successfully downloaded and unpacked the > latest edition. > > Thanks! > > > Bob . . . > > |-------------------------------------------------------| > | The man who does not read good books has no advantage | > | over the man who cannot read them. | > | - Mark Twain | > |-------------------------------------------------------| > > > > > >


    Message 8


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    Time: 07:37:25 AM PST US
    Subject: Re: Radio Wiring question
    From: Vince Ackerman <vack@mac.com>
    --> AeroElectric-List message posted by: Vince Ackerman <vack@mac.com> I talked to a guy at Garmin and DRE today. The DRE guy had me check the same thing on the audio low with respect to continuity. It doesn't appear to be a ground. Then after talking to the Garmin tech rep I found that the low comes off a transformer to act as a sort of noise filter and therefore won't show continuity. He said it "floats" and I should connect it also to the intercom ground. I'm going to finish hooking it up today and see if it works. Thanks again for all the good info George On Monday, Mar 3, 2003, at 18:58 US/Pacific, Charlie & Tupper England wrote: >> >> The wiring diagram for the 250xl comm shows the 2 Comm audio leads >> coming out as a hi and low, both going to an "audio panel." It >> doesn't >> really specify what goes to what. It also shows the shield wire, with >> a >> note to ground the shield at the audio panel. On the shield end of the >> 250xl, the diagram indicates that the shield doesn't appear to be >> connected to anything, unlike other shields such as the Mic. Should I >> assume the shield for the comm goes to ground with the rest (the black >> and shield wires on the DRE)? It's a little confusing how this works. >> > It's quite likely that 'hi & lo' are audio & audio return if they are > both routed to the audio panel. Use an ohm meter to check for > continuity > between the 'low' wire & ground in the 250. A reading anywhere near > zero means it's the return for the 'hi' wire. > I would tie the shield to the audio panel ground if that's specified in > the 250's diagram.


    Message 9


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    Time: 08:42:04 AM PST US
    From: Julia <wings97302@yahoo.com>
    Subject: Re: Need Help Understanding the electrical Diagram?
    --> AeroElectric-List message posted by: Julia <wings97302@yahoo.com> March 4, 2003 Dear Bob: OK Ill go with this diagram (Z-11 Ref. 03/03/03). Question #1. Can I run the F output on the Alternator to the #4 pin on the Master Switch (thereby eliminating the voltage regulator). My alternator already has a built in regulator its an auto alternator one which Im told has been good in experimentals (I dont know off the top of my head exactly what it is). #2. Is the line out of the B lead on the Alternator the line on which the Ampmeter Shunt would go? Also, you show an ANL60 I already own an ANL80 (off another diagram I was following) is that ok? Thanks. "Robert L. Nuckolls, III" <bob.nuckolls@cox.net> wrote: --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" At 11:45 AM 3/3/2003 -0800, you wrote: >--> AeroElectric-List message posted by: Julia > > >Dear Bob: > > >Pardon my primitive electrical questions, but I started out wiring My RV >following your ideas and need some basic help getting the groundwork >layed once my basic circuits are layed I think I can take it from >there. I really hate to ask all this, but I really need some guidance >here. The diagram Im following has the following headings: Typical Wiring >for Internal Regulator & OVM Installation & Page 2.0 revised 2/20/01. > > >Questions: > >1. The Alternator Disconnect (S701-1) the two small terminals, >they are not marked, does it matter which way they are used? Like the >right might be used as the top on the diagram or it could be used as the >bottom one? > > >2. Out of the Starter Contactor (top Right of diagram) the upper >small terminal line goes to a sqwiggly line does that mean it goes to the >Main buss which also has a sqwiggly line at the bottom? > > >3. Out of the Battery Contactor (upper Left of diagram) you have >a line which goes to a 20 AWG fuselink then to a dot with an X whats the >dot & X all about? And where does it go to? > > >4. Is the OVM-14 the same thing as a Crowbar OV protection module >mentioned in other diagrams? > > >5. How do I fit an Essential bus into this picture? My guess is >as follows: run a line from the Main buss shown in the diagram to a diode >and then to the E-Bus. Then from the Positive side of the battery, I just >run line with a fusable link in it and then a switch and then to the >E-Bus hey thats about what it looks like comes out of the Battery >Contactor (Left side top terminal) the line with the black dot and X - >is that what thats all about? (ref. item 3 above). First, keep in mind that all of our drawings are COLLECTIONS of features, not all of which may apply to your project. You need to make a list of electrical items in your airplane and decide if they will be powered from the main bus, e-bus or battery bus. Let's ignore the drawings that come with the OVM-14 . . . they need to be very generic and cover as many bases as possible because the OVM-14 gets installed in a LOT of different airplanes. Let's start with the latest Figure 11 which is being prepared for Rev 11 of the book. Download it from http://216.55.140.222/temp/z11h.pdf . . . start over and develop you list of questions from this drawing only . . . >6. On the Battery/alternator Master Switch pins #3 and #6 do not >go anywhere? Whats up with that? Are they not used for this layout just >left blank? Yes, connections cited but unconnected are treated just as they are shown . . . no connection. >Ive already mounted some items and begun wiring so I really need to >proceed with this layout. Your help would be much appreciated. Okay, let's drop back a few steps and start over. Get the drawing cited above. . . Bob . . . ---------------------------------


    Message 10


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    Time: 08:50:37 AM PST US
    From: "Bob Kuc" <bkuc1@tampabay.rr.com>
    Subject: aec7_1.zip
    --> AeroElectric-List message posted by: "Bob Kuc" <bkuc1@tampabay.rr.com> Bob, I downloaded it and open it up. Do you really need to have AEC7_0.zip in there also? Bob


    Message 11


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    Time: 09:04:17 AM PST US
    From: Jerzy Krasinski <krasinski@direcway.com>
    Subject: Re: New Feature on aeroelectric.com
    --> AeroElectric-List message posted by: Jerzy Krasinski <krasinski@direcway.com> Well, I was less lucky. The AEC7_1.zip file was loaded with NETSCAPE, size over a Mb, but trying to unzip it with WINZIP I got a SCREENSAVER! What?! I repeated loading with EXPLORER and the result was the same - another SCREENSAVER . Will try later on another computer. Jerzy. > >RLNI> http://www.aeroelectric.com/CD/AEC7_1.zip > > >RLNI> Would be interested in getting feedback from folks >RLNI> who have successfully downloaded and unpacked the >RLNI> latest edition. > >RLNI> Thanks! > > > >


    Message 12


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    Time: 09:07:05 AM PST US
    From: "Neville Kilford" <nkilford@etravel.org>
    Subject: Re: Aerial spacing requirements
    --> AeroElectric-List message posted by: "Neville Kilford" <nkilford@etravel.org> Do not archive Thanks Bob, It's jolly reassuring to have your independent and expert view on things -- manufacturers say lots of different things about spacing, groundplanes, etc., and it's difficult to read between the lines BTW, not strictly on-topic, but many thanks for the excellent manual. USPS does a great shipping here. All I need to do now is find a US-style ring binder and I'll be laughing. Cheers. Nev ----- Original Message ----- From: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net> Subject: Re: AeroElectric-List: Aerial spacing requirements > Every manufacturer of a device that uses an antenna will > tell you that the best performance will be had if HIS > antenna is at least 100 yards away from everyone else's > antenna. Given that we're wiring airplanes instead of football > fields, you just do the best you can. It's a good idea to > keep antennas of near frequency (nav and comm, transponder and > dme) as far from each other as practical . . . but they > work quite happily near antennas that are several factors > away in operating frequency. > > Antennas on an airplane don't have to be ideal. Virtually > all aviation radio services are line of sight. Your radios > would perform at some useful level using a wet string hung > out the window. Putting a "more efficient" antenna on will > only make things better . . . don't loose any sleep over > how much abuse you're heaping on the radios by making > them share limited antenna space on your airframe. >


    Message 13


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    Time: 09:20:12 AM PST US
    From: "Bruce Gray" <Bruce@glasair.org>
    Subject: New Feature on aeroelectric.com
    --> AeroElectric-List message posted by: "Bruce Gray" <Bruce@glasair.org> Bob, It worked fine for me. IE 6 and winzip. Bruce www.glasair.org -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Jerzy Krasinski Subject: Re: AeroElectric-List: New Feature on aeroelectric.com --> AeroElectric-List message posted by: Jerzy Krasinski <krasinski@direcway.com> Well, I was less lucky. The AEC7_1.zip file was loaded with NETSCAPE, size over a Mb, but trying to unzip it with WINZIP I got a SCREENSAVER! What?! I repeated loading with EXPLORER and the result was the same - another SCREENSAVER . Will try later on another computer. Jerzy. > >RLNI> http://www.aeroelectric.com/CD/AEC7_1.zip > > >RLNI> Would be interested in getting feedback from folks >RLNI> who have successfully downloaded and unpacked the >RLNI> latest edition. > >RLNI> Thanks! > > > >


    Message 14


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    Time: 01:55:52 PM PST US
    Subject: switch mounting nuts
    From: "Robert Dickson" <robert@thenews-journal.com>
    --> AeroElectric-List message posted by: "Robert Dickson" <robert@thenews-journal.com> this feels like a dumb question, but what do you do with the second nut on toggle switches? My guess is that it's probably for spacing the switch somehow, but if I just want to mount the switches flush against the panel do I still need it? ignorant minds want to know. . . Robert Dickson RV-6A electrical


    Message 15


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    Time: 03:18:50 PM PST US
    From: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
    Subject: Re: switch mounting nuts
    --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net> At 04:46 PM 3/4/2003 -0500, you wrote: >--> AeroElectric-List message posted by: "Robert Dickson" ><robert@thenews-journal.com> > >this feels like a dumb question, but what do you do with the second nut on >toggle switches? My guess is that it's probably for spacing the switch >somehow, but if I just want to mount the switches flush against the panel do >I still need it? > >ignorant minds want to know. . . You should not put any tension on the bushing-to-switch-housing interface. All clamp-up forces that mount a switch to the panel should be carried between two nuts on the bushing. Bob . . .


    Message 16


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    Time: 03:23:25 PM PST US
    From: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
    Subject: Re: New Feature on aeroelectric.com
    --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net> At 10:58 AM 3/4/2003 -0600, you wrote: >--> AeroElectric-List message posted by: Jerzy Krasinski ><krasinski@direcway.com> > >Well, I was less lucky. >The AEC7_1.zip file was loaded with NETSCAPE, size over a Mb, but trying >to unzip it with WINZIP I got a SCREENSAVER! What?! I repeated >loading with EXPLORER and the result was the same - another SCREENSAVER . >Will try later on another computer. >Jerzy. Right-Click the link and tell your browser where to store it on your hard drive. The finished file should be on the order of 130 Megabytes. Dunno about the screensaver . . . that's a new one on me. Bob . . .


    Message 17


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    Time: 04:04:49 PM PST US
    From: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
    Subject: Calling Paul Bowmar . . .
    --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net> If anyone has a good e-mail address for Paul Bowmar I'd appreciate getting it. He tried to contact me about firewall fittings via my website e-mail queary form and he keyed in a wrong e-mail address . . . my reply to him bounced. Bob . . . |-------------------------------------------------------| | The man who does not read good books has no advantage | | over the man who cannot read them. | | - Mark Twain | |-------------------------------------------------------|


    Message 18


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    Time: 04:54:09 PM PST US
    From: Robert McCallum <robert.mccallum2@sympatico.ca>
    Subject: Re: New Feature on aeroelectric.com
    --> AeroElectric-List message posted by: Robert McCallum <robert.mccallum2@sympatico.ca> Robert McCallum wrote: > --> AeroElectric-List message posted by: Robert McCallum <robert.mccallum2@sympatico.ca> > > "Robert L. Nuckolls, III" wrote: > > > Would be interested in getting feedback from folks > > who have successfully downloaded and unpacked the > > latest edition. > > > > Thanks! > > Bob; > The CD link does not appear to lead anywhere. Tried both with Netscape 7 and Internet Explorer 6.0 > In both cases came up with a blank page. The wiring schematics work fine. > -- > Bob McC Very, very, strange folks. Tried again tonight and it worked perfectly. Did exactly what I tried last night, this time it worked. Ah the mysteries of the computer. Thanks Bob -- Bob McC DO NOT ARCHIVE


    Message 19


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    Time: 06:07:28 PM PST US
    From: "Eric M. Jones" <emjones@charter.net>
    Subject: Re: LED nav lights
    --> AeroElectric-List message posted by: "Eric M. Jones" <emjones@charter.net> Mark, Okay, ah..........but that's because it used to be called Builder's aids....etc. Thanks Werner. Eric


    Message 20


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    Time: 06:22:09 PM PST US
    From: "Eric M. Jones" <emjones@charter.net>
    Subject: Firewall penetrations for wires . . .
    --> AeroElectric-List message posted by: "Eric M. Jones" <emjones@charter.net> Here's my Airplane Builder's Epiphany (or it could be something I ate): -----The extreme amount of care in putting wires through the firewall is a bogus deal. Maybe this is left over from the days when the airplane was all wood except the engine compartment. Can anyone point to a single case where this care was rewarded? The auto makers decided long ago that a little rubber and UL 94 V-O plastic bulkhead connector was good enough. As for me, I can't imagine a fire situation where concern about the feedthroughs would make any sense. If my engine is on fire...some fire putty wouldn't be worth a tinker's dam (which is also made of putty...) Opinions? Anybody been there and done that? Eric


    Message 21


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    Time: 07:20:55 PM PST US
    From: "David Carter" <dcarter@datarecall.net>
    Subject: Re: Firewall penetrations for wires . . .
    --> AeroElectric-List message posted by: "David Carter" <dcarter@datarecall.net> Think "blow torch" into your lap through the hole(s) 10 seconds after your fuel fire melts your rubber and aluminum cheapo shields. Think "car fire in engine compartment, black spot beside hiway" where driver pulled over and got out and watched the car burn up. Can't do that in an airplane. David Carter ----- Original Message ----- From: "Eric M. Jones" <emjones@charter.net> Subject: AeroElectric-List: Firewall penetrations for wires . . . > --> AeroElectric-List message posted by: "Eric M. Jones" <emjones@charter.net> > > Here's my Airplane Builder's Epiphany (or it could be something I ate): > > -----The extreme amount of care in putting wires through the firewall is a bogus deal. Maybe this is left over from the days when the airplane was all wood except the engine compartment. > > Can anyone point to a single case where this care was rewarded? The auto makers decided long ago that a little rubber and UL 94 V-O plastic bulkhead connector was good enough. As for me, I can't imagine a fire situation where concern about the feedthroughs would make any sense. If my engine is on fire...some fire putty wouldn't be worth a tinker's dam (which is also made of putty...) > > Opinions? Anybody been there and done that? > > Eric > >


    Message 22


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    Time: 08:00:59 PM PST US
    From: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net>
    Subject: Re: Firewall penetrations for wires . . .
    --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <bob.nuckolls@cox.net> At 09:18 PM 3/4/2003 -0500, you wrote: >--> AeroElectric-List message posted by: "Eric M. Jones" <emjones@charter.net> > >Here's my Airplane Builder's Epiphany (or it could be something I ate): > >-----The extreme amount of care in putting wires through the firewall is a >bogus deal. Maybe this is left over from the days when the airplane was >all wood except the engine compartment. > >Can anyone point to a single case where this care was rewarded? The auto >makers decided long ago that a little rubber and UL 94 V-O plastic >bulkhead connector was good enough. As for me, I can't imagine a fire >situation where concern about the feedthroughs would make any sense. If my >engine is on fire...some fire putty wouldn't be worth a tinker's dam >(which is also made of putty...) > >Opinions? Anybody been there and done that? > >Eric Fuel-fed fires are fortunately rare but when they do happen, the potential for total loss of the day is very high. The concern is not for "wood aft of the wirewall" but people and hardware aft of the firewall. It doesn't take a very large hole to admit noxious stuff into the cockpit. Make the hole larger yet and you get flames and/or enough hot gasses to start doing the nasty on things behind the panel . . . tefzel, like it's cousin teflon, has hazardous products of combustion. Here's an excerpt from Part 23 that we have to build to for certification: Sec. 23.1191 Firewalls. (a) Each engine, auxiliary power unit, fuel burning heater, and other combustion equipment, must be isolated from the rest of the airplane by firewalls, shrouds, or equivalent means. (b) Each firewall or shroud must be constructed so that no hazardous quantity of liquid, gas, or flame can pass from the compartment created by the firewall or shroud to other parts of the airplane. (c) Each opening in the firewall or shroud must be sealed with close fitting, fireproof grommets, bushings, or firewall fittings. (d) [Reserved] (e) Each firewall and shroud must be fireproof and protected against corrosion. (f) Compliance with the criteria for fireproof materials or components must be shown as follows: (1) The flame to which the materials or components are subjected must be 2000 +/- 150 deg.F. (2) Sheet materials approximately 10 inches square must be subjected to the flame from a suitable burner. (3) The flame must be large enough to maintain the required test temperature over an area approximately five inches square. (g) Firewall materials and fittings must resist flame penetration for at least 15 minutes. (h) The following materials may be used in firewalls or shrouds without being tested as required by this section: (1) Stainless steel sheet, 0.015 inch thick. (2) Mild steel sheet (coated with aluminum or otherwise protected against corrosion) 0.018 inch thick. (3) Terne plate, 0.018 inch thick. (4) Monel metal, 0.018 inch thick. (5) Steel or copper base alloy firewall fittings. (6) Titanium sheet, 0.016 inch thick. The 15 minute thing was selected with two possible outcomes in mind (1) you can get on the ground in that period of time and/or if you have fuel shutoff valves at the firewall and the engine shuts down, fuel flow available to feed the fire would likely run out within 15 minutes. I know of two in-flight fires in amateur built aircraft in the past 5 years. Both ended poorly. In one case, the pilot exited the aircraft at altitude (things in the cockpit too hot or too smokey?). It's one of those things that while rare, is not difficult to take advantage of things learned in a century of airplane building to mitigate the risk. Bob . . .


    Message 23


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    Time: 08:01:25 PM PST US
    From: Jerzy Krasinski <krasinski@direcway.com>
    Subject: Re: New Feature on aeroelectric.com
    --> AeroElectric-List message posted by: Jerzy Krasinski <krasinski@direcway.com> It loaded just fine on another computer. I do not understand the reasons it did not work on the first one, which unzipped many other programs. Probably a peculiarity of Windows. Jerzy Jerzy Krasinski wrote: >--> AeroElectric-List message posted by: Jerzy Krasinski <krasinski@direcway.com> > >Well, I was less lucky. >The AEC7_1.zip file was loaded with NETSCAPE, size over a Mb, but trying >to unzip it with WINZIP I got a SCREENSAVER! What?! I repeated >loading with EXPLORER and the result was the same - another SCREENSAVER . >Will try later on another computer. >Jerzy. > > > > >>RLNI> http://www.aeroelectric.com/CD/AEC7_1.zip >> >> >>RLNI> Would be interested in getting feedback from folks >>RLNI> who have successfully downloaded and unpacked the >>RLNI> latest edition. >> >>RLNI> Thanks! >> >> >> >> >> >> > > > >


    Message 24


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    Time: 08:32:25 PM PST US
    From: "John Slade" <sladerj@bellsouth.net>
    Subject: Firewall penetrations for wires . . .
    --> AeroElectric-List message posted by: "John Slade" <sladerj@bellsouth.net> > Think "blow torch" into your lap .... Think about putting the engine on the "Wright" end of the airplane. John Slade Cozy IV




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