AeroElectric-List Digest Archive

Tue 04/12/05


Total Messages Posted: 20



Today's Message Index:
----------------------
 
     1. 04:41 AM - Electroair Ignition (Sam Chambers)
     2. 05:32 AM - Re: Re: A for real Load Dump Fried (Robert L. Nuckolls, III)
     3. 06:02 AM - Test (BobsV35B@aol.com)
     4. 06:41 AM - Re: Contact Arc Suppression  (Eric M. Jones)
     5. 06:47 AM - Re: Test (cgalley)
     6. 07:10 AM - Re: Re: A for real Load Dump Fried Instrument.  (George Braly)
     7. 08:28 AM - Aviation News (AVIATION GROUP)
     8. 09:19 AM - Re: Re: A for real Load Dump Fried  (Robert L. Nuckolls, III)
     9. 02:15 PM - White LED (Hinde, Frank George (Corvallis))
    10. 03:29 PM - Re: White LED (Robert McCallum)
    11. 03:32 PM - Re: White LED (william mills)
    12. 04:17 PM - Re: White LED (Paul McAllister)
    13. 04:19 PM - CBA-II failures (Robert L. Nuckolls, III)
    14. 04:40 PM - [ William Schertz ] : New Email List Photo Share Available! (Email List Photo Shares)
    15. 07:47 PM - alternator speed (Jim Jewell)
    16. 08:25 PM - noise in bose headsets (Jeff Hildebrand)
    17. 08:35 PM - Compass Location (Tinne maha)
    18. 08:42 PM - Re: noise in bose headsets (Richard Riley)
    19. 09:13 PM - Good source of information (james.k.glindemann@exxonmobil.com)
    20. 10:55 PM - Re: Compass Location (randall)
 
 
 


Message 1


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    Time: 04:41:09 AM PST US
    From: "Sam Chambers" <schamber@glasgow-ky.com>
    Subject: Electroair Ignition
    --> AeroElectric-List message posted by: "Sam Chambers" <schamber@glasgow-ky.com> I posted this to the Canard Aviator's Yahoo Group this morning and thought it might be of interest to this forum as well. First off, many thanks to all who answered my plea for Jeff Rose's contact information. (Canard Aviator's) I seem to recall reading here that Jeff had stopped production of the ignition. That is correct, but he sold the business to a new owner in Michigan. I talked to him at length Monday and he is very interested in continued support and development. He has parts, I ordered a pick-up from him yesterday morning. His name is Mike Kobylik, phone (toll free) 1-866-494-3002, e-mail, sales@electroair.net. Mike was glad for me to post the info, give him a call if you need anything. Thanks, Sam Chambers Glasgow, KY Long-EZ N775AM EAA Flight Adv & Tech Coun Co-Host Rough River Canard Fly-In


    Message 2


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    Time: 05:32:43 AM PST US
    From: "Robert L. Nuckolls, III" <b.nuckolls@cox.net> Instrument.
    Subject: Re: RE: A for real Load Dump Fried
    Instrument. --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <b.nuckolls@cox.net> Instrument. At 10:28 PM 4/11/2005 -0500, you wrote: >--> AeroElectric-List message posted by: "George Braly" <gwbraly@gami.com> > > >Bob, > >Over the weekend, I saw an encoding altimeter get fried for real by a >spike on a load dump. The spike was about 18 to 20 volts observed on the >digital indicator, but the peaks of the spikes were probably much much >higher. > >There were multiple transorbs in the circuit. >This particular encoder has a warning not to power it above 16 volts. Hmmmm . . . another product pushed out of the nest to live in the harsh world of DO160/M704 with inadequate resources and defenses. Seems our children are not the only victims of inadequate foresight and poor teachers. Do you know what brand and model? Bob . . .


    Message 3


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    Time: 06:02:39 AM PST US
    From: BobsV35B@aol.com
    Subject: Test
    --> AeroElectric-List message posted by: BobsV35B@aol.com Test sent at 0801 Do Not Archive Happy Skies, Old Bob AKA Bob Siegfried Ancient Aviator Stearman N3977A Brookeridge Airpark LL22 Downers Grove, IL 60516 630 985-8502


    Message 4


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    Time: 06:41:44 AM PST US
    From: "Eric M. Jones" <emjones@charter.net>
    Subject: Re: Contact Arc Suppression
    --> AeroElectric-List message posted by: "Eric M. Jones" <emjones@charter.net> --> AeroElectric-List message posted by: "glaesers" <glaesers@wideopenwest.com> >What about your PowerLink Contactor - doesn't that technology scale up well to 42V? (You say you can get one good for 30V - what's another few >volts among friends ;-) >Wouldn't it work as a B+ contactor for the 12V crowd - as long as you have a WhackJack on the B lead to limit the voltage? The price is a hurdle, >but it does solve the arcing problem. Dennis Glaeser Dennis, I don't propose anyone design the OBAM aircraft to 42V now. I am now making up the first of the 14.5 V units but the higher voltage devices may never happen. Many of the advantages of higher voltages seem to have evaporated---more in a later post. Yes, indeed it solves all the arcing etc., but there will still be lots of contacts around for decades. Most of this work was done by Paul Messinger who elaborately tested lab versions of aircraft electrical systems. Paul has already demonstrated that a failed alternator regulator can produce at least 200V and the arc ("Fire") never quits at 20 amps and 100V. Really spectacular he says. The test was an alternator with field leads brought out and connected to a power supply where field voltage could be manually controlled and the "B" lead was loaded as above. Paul stopped the 200V test to prevent destruction of the alternator diodes and the fire test was stopped after a few seconds but the contactor is now NFG. How bad is a runaway alternator? Well...there isn't much data, but the diodes blow up at whatever their withstand voltage is, usually 300V. I also think this is a very rare event, but getting estimates of MTBF has proved difficult. Opinions? Regards, Eric M. Jones www.PerihelionDesign.com 113 Brentwood Drive Southbridge MA 01550-2705 Phone (508) 764-2072 Email: emjones@charter.net "Sometimes I wonder whether the world is being run by smart people who are putting us on or by imbeciles who really mean it." - Mark Twain


    Message 5


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    Time: 06:47:43 AM PST US
    From: "cgalley" <cgalley@qcbc.org>
    Subject: Re: Test
    --> AeroElectric-List message posted by: "cgalley" <cgalley@qcbc.org> I think your computer clock is a minute fast. ----- Original Message ----- From: <BobsV35B@aol.com> Subject: AeroElectric-List: Test > --> AeroElectric-List message posted by: BobsV35B@aol.com > > Test sent at 0801 > Do Not Archive > > Happy Skies, > > Old Bob > AKA > Bob Siegfried > Ancient Aviator > Stearman N3977A > Brookeridge Airpark LL22 > Downers Grove, IL 60516 > 630 985-8502 > > > > > > >


    Message 6


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    Time: 07:10:22 AM PST US
    Subject: RE: A for real Load Dump Fried Instrument.
    From: "George Braly" <gwbraly@gami.com>
    --> AeroElectric-List message posted by: "George Braly" <gwbraly@gami.com> Yes. It is an aero mech 8140 (I think) encoding altimeter. Strapped for 14 volt operation. Warning note on the case says, "If pins x & y are tied together for 14 volt operation, do not operate at more than 16 volts." Blew the power supply. Shorted to ground and that popped the 1 amp fuse on the system. Regards, George -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Robert L. Nuckolls, III Subject: Re: AeroElectric-List: RE: A for real Load Dump Fried Instrument. --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <b.nuckolls@cox.net> Instrument. At 10:28 PM 4/11/2005 -0500, you wrote: >--> AeroElectric-List message posted by: "George Braly" <gwbraly@gami.com> > > >Bob, > >Over the weekend, I saw an encoding altimeter get fried for real by a >spike on a load dump. The spike was about 18 to 20 volts observed on the >digital indicator, but the peaks of the spikes were probably much much >higher. > >There were multiple transorbs in the circuit. >This particular encoder has a warning not to power it above 16 volts. Hmmmm . . . another product pushed out of the nest to live in the harsh world of DO160/M704 with inadequate resources and defenses. Seems our children are not the only victims of inadequate foresight and poor teachers. Do you know what brand and model? Bob . . . --- ---


    Message 7


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    Time: 08:28:13 AM PST US
    From: AVIATION GROUP <aviationgrp@yahoo.com>
    Subject: Aviation News
    aeroelectric-list@matronics.com, pietenpol-list@matronics.com --> AeroElectric-List message posted by: AVIATION GROUP <aviationgrp@yahoo.com> AVIATION News Group is to view & share your valuable comments and the latest trends and happenings in the aviation industry. Please click on the attached yahoo group link site to share & receive the updates on the latest happenings, business ventures, business opportunities, Air Shows and Exhibitions, New Aircraft releases, and certifications, Career news, Appointments etc. http://groups.yahoo.com/group/AVIATION-NEWS/ Please take few moments recommend us to your near & dears in the industry. We welcome your valuable comments and updates. With best regards AVIATION NEWS. http://groups.yahoo.com/group/AVIATION-NEWS/ ---------------------------------


    Message 8


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    Time: 09:19:45 AM PST US
    From: "Robert L. Nuckolls, III" <b.nuckolls@cox.net> Instrument.
    Subject: RE: A for real Load Dump Fried
    Instrument. --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <b.nuckolls@cox.net> Instrument. At 09:09 AM 4/12/2005 -0500, you wrote: >--> AeroElectric-List message posted by: "George Braly" <gwbraly@gami.com> > >Yes. > >It is an aero mech 8140 (I think) encoding altimeter. > >Strapped for 14 volt operation. > >Warning note on the case says, "If pins x & y are tied together for 14 >volt operation, do not operate at more than 16 volts." > >Blew the power supply. Shorted to ground and that popped the 1 amp fuse >on the system. > >Regards, George Interesting. I am continually amazed at how many ISO qualified, FAA scrutinized, 6-sigma Sanforized organizations get this kind of product onto the market. At least it can be said that they recognized hard limits on their product and warned the customer about it. But having posted proper warning, how's the average avionics installer supposed to react to that information? I suppose I would consider installing a resistor/transorb combination in the supply line . . . but I don't know how sensitive the device might be to increased source impedance of the supply. I have to make some assumptions and then ad components external to the black boxes that are supposed to live in harmony with the environment to which they are sold. In my never humble opinion, this is an example of gross indifference to the needs of the customer who is paying for the product. Bob . . .


    Message 9


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    Time: 02:15:27 PM PST US
    Subject: White LED
    From: "Hinde, Frank George (Corvallis)" <frank.hinde@hp.com>
    --> AeroElectric-List message posted by: "Hinde, Frank George (Corvallis)" <frank.hinde@hp.com> Hi I am building up a pair of position lights from and LED kit. Seems a shame not to have the same advantages for the white tail position light. Has anyone done this or do you know if bright enough white LED's are available? Thanks Frank


    Message 10


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    Time: 03:29:12 PM PST US
    From: Robert McCallum <robert.mccallum2@sympatico.ca>
    Subject: Re: White LED
    --> AeroElectric-List message posted by: Robert McCallum <robert.mccallum2@sympatico.ca> Frank Whelen markets LED tail position lights and check out this list's own Eric Jones' site @ http://www.periheliondesign.com/ledlights.htm for position lights as well Several others also market LED wing and tail position lights and/or kits. Many people have done this and they are certainly bright enough these days but you have to be careful that you achieve legal coverage. Bob McC Hinde, Frank George (Corvallis) wrote: >--> AeroElectric-List message posted by: "Hinde, Frank George (Corvallis)" <frank.hinde@hp.com> > > Hi I am building up a pair of position lights from and LED kit. Seems a >shame not to have the same advantages for the white tail position light. > >Has anyone done this or do you know if bright enough white LED's are >available? > >Thanks > >Frank > > > >


    Message 11


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    Time: 03:32:08 PM PST US
    From: william mills <courierboy@earthlink.net>
    Subject: Re: White LED
    --> AeroElectric-List message posted by: william mills <courierboy@earthlink.net> Frank - See: http://www.periheliondesign.com/ledlights.htm Eric Jones is a constant and valued contributor to this list - he has some that may suit you. Bill >-> AeroElectric-List message posted by: "Hinde, Frank George >(Corvallis)" <frank.hinde@hp.com> > > Hi I am building up a pair of position lights from and LED kit. Seems a >shame not to have the same advantages for the white tail position light. > >Has anyone done this or do you know if bright enough white LED's are >available? > >Thanks > >Frank > >


    Message 12


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    Time: 04:17:21 PM PST US
    From: "Paul McAllister" <paul.mcallister@qia.net>
    Subject: Re: White LED
    --> AeroElectric-List message posted by: "Paul McAllister" <paul.mcallister@qia.net> Frank, I have one of Eric's rear position lights installed on my Europa and it works great. Paul ----- Original Message ----- > From: "Hinde, Frank George (Corvallis)" <frank.hinde@hp.com> > Hi I am building up a pair of position lights from and LED kit. Seems a > shame not to have the same advantages for the white tail position light. > > Has anyone done this or do you know if bright enough white LED's are > available? > > Thanks > > Frank


    Message 13


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    Time: 04:19:12 PM PST US
    From: "Robert L. Nuckolls, III" <b.nuckolls@cox.net>
    Subject: CBA-II failures
    --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <b.nuckolls@cox.net> I've had several exchanges with Del Schier of West Mountain Radio, designer and manufacturer of the CBA-II battery analyzer. I'm satisfied that the failure I suffered may have been due to mis-assembly. He assures me that failure rates are quite low, Perhaps 12 out of 2,000 and that they've done extensive testing at the 100W battery testing levels. We're discussing future upgrades and larger versions that might be able to do 1,000 watt plus discharges and have several new features in software. I'll continue to work with Del and maybe do some beta-testing of new products. I've ordered a second CBA-II to replace the one I took all apart and will continue to use it in a variety of testing applications here. My sense is that anyone who has or is considering a purchase of the CBA-II in its present form is not at risk for disappointment. Del has been forthcoming and seems quite competent both as a designer and a business-person. Bob . . .


    Message 14


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    Time: 04:40:50 PM PST US
    Subject: [ William Schertz ] : New Email List Photo Share Available!
    From: Email List Photo Shares <pictures@matronics.com>
    --> AeroElectric-List message posted by: Email List Photo Shares <pictures@matronics.com> A new Email List Photo Share is available: Poster: William Schertz <wschertz@ispwest.com> Lists: Aeroelectric-List Subject: One Alternator -- two Battery architecture http://www.matronics.com/photoshare/wschertz@ispwest.com.04.12.2005/index.html o Main Photo Share Index http://www.matronics.com/photoshare o Submitting a Photo Share If you wish to submit a Photo Share of your own, please include the following information along with your email message and files: 1) Email List or Lists that they are related to: 2) Your Full Name: 3) Your Email Address: 4) One line Subject description: 5) Multi-line, multi-paragraph description of topic: 6) One-line Description of each photo or file: Email the information above and your files and photos to: pictures@matronics.com


    Message 15


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    Time: 07:47:03 PM PST US
    From: "Jim Jewell" <jjewell@telus.net>
    Subject: alternator speed
    --> AeroElectric-List message posted by: "Jim Jewell" <jjewell@telus.net> Just before the list went away I sent the email copied below. I don't think it got posted. ----- Original Message ----- From: "Jim Jewell" <jjewell@telus.net> Subject: Re: AeroElectric-List: Alternator Speed An observation, and opinion do not archive > > Speaking of fan belt energy losses; > The majority of the energy loss that fan belts experience as the belt > rounds the pulleys will be given off as heat. If the heat climbs high > enough it will inevitably induce a heat related failure. I personally have > yet to see first hand, a properly adjusted fan felt that suffered such a > premature failure mode. > The worst application I have seen for an > automotive V-belt was the fan belt on the GM Corp. Corvair. They came off > if not very closely watched but they did not get burned off. Not in my > experience > at least. > During many past years I have seen a large number of un-altered unbalanced > alternators on various competition vehicles run at RPM rates that by far > exceeded the RPM rates that have been recently expressed as potentially > harmful on the rv-lists. > I am not saying balancing is of no value. Without a doubt balanced to a > finer tolerance is better. However I doubt that reducing RPM rates with 4+ > inch diameter alternator pulleys and larger will really be worth the > effort and cost. > > Many of the vehicles I refer to ran in 24 hr endurance conditions with > high loads created by lighting requirements etc. > More recently battling the heat generated by serpentine belts bending > around and reversing over many different pulleys has been handled by > improving materials use and reducing belt mass with micro V-belts. > Regardless the vast majority of belt failures that I have seen were age > and contamination related. > > I am not saying re-balancing rotating masses is of no value. Without a > doubt balanced to a finer than OEM tolerance is better. However I doubt > that reducing alternator RPM rates with 4+ inch diameter alternator > pulleys and larger will really be worth the effort and cost. > For me, balance the engine first. Then dynamically balance the prop, that > done, next on the list for me would be the alternator. > Mind you in the above example the alternator would get balanced along with > the engine anyhow. > Regardless, I consider the Dynamic prop balancing a must. Good for the > whole airframe and all of it's components! > > Jim in Kelowna opinion, do not archive


    Message 16


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    Time: 08:25:28 PM PST US
    From: "Jeff Hildebrand" <jhildebrand@crownequip.com>
    Subject: noise in bose headsets
    --> AeroElectric-List message posted by: "Jeff Hildebrand" <jhildebrand@crownequip.com> I was wondering how to filter some noise out of our aircraft powered Bose headsets. We recently put Bose headsets in our Lancair that are powered by the aircraft. Since we have used the Bose headsets, we have a small amount of =93clicking=94 in the headsets. Not a lot of noise, but because they are so quiet you do notice it. Before we had the Bose headsets, we didn=92t have any noise, so I am assuming it is coming through the circuit that powers the ANR. Would it help to filter the ANR circuit with a radio shack filter? If so, how would you wire the circuit? Thanks, Jeff Hildebrand Lancair ES C-GSPH =96 Winnipeg, MB HYPERLINK "http://www.lancaires.com/"www.lancaires.com --


    Message 17


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    Time: 08:35:30 PM PST US
    From: "Tinne maha" <tinnemaha@hotmail.com>
    Subject: Compass Location
    --> AeroElectric-List message posted by: "Tinne maha" <tinnemaha@hotmail.com> Hello List, I am hoping someone can point me to some good data on how close I can mount my compass to avionics or instruments and still have it be accurate: I need to choose between 3 options for locating my in-panel compass: 1) - Mount the compass ~2" from my Garmin Panel mounted GPS/Comm 2) - Mount it ~6" from a King KT-76a Transponder AND right next to my quad gauge & intercom 3) - Cut another new panel & mount it on the far side of the panel where it will be difficult to read. Any help or suggestions are appreciated. Thanks, Grant


    Message 18


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    Time: 08:42:45 PM PST US
    From: Richard Riley <Richard@RILEY.NET>
    Subject: Re: noise in bose headsets
    --> AeroElectric-List message posted by: Richard Riley <Richard@Riley.net> Do you have an electronic ignition? At 08:22 PM 4/12/05, you wrote: >--> AeroElectric-List message posted by: "Jeff Hildebrand" ><jhildebrand@crownequip.com> > >I was wondering how to filter some noise out of our aircraft powered Bose >headsets.


    Message 19


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    Time: 09:13:02 PM PST US
    Subject: Good source of information
    From: james.k.glindemann@exxonmobil.com
    14, 2004) at 04/12/2005 11:09:15 PM --> AeroElectric-List message posted by: james.k.glindemann@exxonmobil.com The Australian Civil Aviation Safety Authority has just released a draft document which is a veritable gold mine of aviation electrical and wiring information. Big document but if you have a fast connection it may prove to be valuable. http://rrp.casa.gov.au/casr/021.asp#2005


    Message 20


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    Time: 10:55:49 PM PST US
    From: "randall" <rv6n6r@comcast.net>
    Subject: Re: Compass Location
    --> AeroElectric-List message posted by: "randall" <rv6n6r@comcast.net> Its difficult to know for sure without getting the instruments and holding the compass next to them but I'd say you'l likely have noticable compass error if you put it next to either of those radios. In my experience 5-7" has worked for most 'offending' items but that's widely variable. Do you think you'll NEED to be able to read the thing? If you're flying IFR and expect to be adjusting your DG to match the wet compass then you may need to figure out a way to locate it front/center and separate from your electronic gizmos. On the other hand if you're VFR only, what with GPS you're not going to use it much if at all. In that case I'd just put it somewhere away from the electronic stuff so at least it's accurate if you need it, but not worry too much about how easy it is to read. Randall Henderson RV-6 N6R ----- Original Message ----- From: "Tinne maha" <tinnemaha@hotmail.com> Subject: AeroElectric-List: Compass Location > --> AeroElectric-List message posted by: "Tinne maha" <tinnemaha@hotmail.com> > > Hello List, > > I am hoping someone can point me to some good data on how close I can mount > my compass to avionics or instruments and still have it be accurate: > > I need to choose between 3 options for locating my in-panel compass: > > 1) - Mount the compass ~2" from my Garmin Panel mounted GPS/Comm > > 2) - Mount it ~6" from a King KT-76a Transponder AND right next to my > quad gauge & intercom > > 3) - Cut another new panel & mount it on the far side of the panel > where it will be difficult to read. > > Any help or suggestions are appreciated. > Thanks, > Grant > >




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