---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Wed 11/01/06: 8 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 05:24 AM - Re: FW: SKYMAP IIIC question (Gilles.Thesee) 2. 06:01 AM - no battery contactor? (j. davis) 3. 06:46 AM - Re: no battery contactor? (Robert L. Nuckolls, III) 4. 06:47 AM - Re: Dead Horses don't die... (Robert L. Nuckolls, III) 5. 06:50 AM - Re: Dead Horses don't die... (Robert L. Nuckolls, III) 6. 09:35 AM - GTX327 power switching (Erich_Weaver@URSCorp.com) 7. 03:07 PM - BNC angle adapter doesn't fit (Ken) 8. 07:36 PM - Matronics Email List Fund Raiser - November! (Matt Dralle) ________________________________ Message 1 _____________________________________ Time: 05:24:57 AM PST US From: "Gilles.Thesee" Subject: Re: FW: AeroElectric-List: SKYMAP IIIC question --> AeroElectric-List message posted by: "Gilles.Thesee" Ivor, Kent, Thank you for your help and your quick answer. I'm passing on the info. Thanks again, Best regards, Gilles http://contrails.free.fr > This is from my manual of last year, so should be current, > Regards > Ivor > > > Anyone happen to have info concerning the wiring of the GPS BENDIX > SKYMAP IIIC ? > ________________________________ Message 2 _____________________________________ Time: 06:01:33 AM PST US From: "j. davis" Subject: AeroElectric-List: no battery contactor? --> AeroElectric-List message posted by: "j. davis" Greetings... I'm just wondering what the justification for eliminating a battery contactor as per Z17 or Z-20? Also, if the S700-2-10 split master type switch can be replaced by a 2-3, per appendix Z, how should it be wired, exactly? Thanks... -- Regards, J. flying: Zenith STOL CH701/912 C-IGGY, 350 hrs. building: Sonex #325, Jabiru 3300/6, 85% completed +-------------------------------------------------------+ | J. Davis, M.Sc. | (computer science) | | *NIX consulting, SysAdmin | jd at lawsonimaging.ca | | c/o Brandywine Aviation | voice: 519.289.1527 | | 5507 Irish Dr., Appin, ON | http://www.cleco.ca | | N42 47.33 W081 36.50 31/13 | 2000+ x 60', elev: 740' | +-------------------------------------------------------+ To most people the sky is the limit. To those who love aviation, the sky is home. Take charge of your attitude. Don't let someone else choose it for you. ________________________________ Message 3 _____________________________________ Time: 06:46:14 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: no battery contactor? --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" At 08:59 AM 11/1/2006 -0500, you wrote: >--> AeroElectric-List message posted by: "j. davis" > >Greetings... > >I'm just wondering what the justification for eliminating a battery >contactor as per Z17 or Z-20? The engine drive power sources for a number of small engines have limited output. The classic battery contactor implementation consumes 0.7 to 1.0 amps for the duration of flight. In most cases, there's energy-to- burn while the main alternator is functioning but for Rotax and Jabiru engines, this resource is small (8-18 amps) and a builder may elect to avoid power losses represented by the installation of a battery contactor. Indeed ANY airplane can use a manual switch in lieu of a contactor . . . but recall that one of the design goals for a contactor is that when the master switch is OFF, the amount of hot wiring between battery and battery switch is minimized. >Also, if the S700-2-10 split master type switch can be replaced by a 2-3, >per appendix Z, how should it be wired, exactly? A 2-3 is not progressive transfer . . . so the battery and alternator come on and off together. This presents a problem for conducting battery-only ground ops where an alternator might come alive even with the engine not running and load the battery unnecessarily during ground testing. If you use a 2-3, the pulling the alternator field breaker during ground ops takes the place of the progressive transfer feature of the 2-10 where the system can be alive on battery only. Looking at the back of the switch, the 2-3 is wired just like a 2-10. Bob . . . ________________________________ Message 4 _____________________________________ Time: 06:47:48 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Dead Horses don't die... --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" At 08:00 AM 10/27/2006 -0400, you wrote: >In a message dated 10/27/2006 4:35:56 AM Central Daylight Time, >khorton01@rogers.com writes: >What sorts of problems can I anticipate due to >the power handling issues? Do I need to have the radio OFF during >start up and shut down? > > >>>>>>>>> >"Radios ON/OFF" are checklist items for me- haven't seen any negative >effects from radio yet when "OFF" item missed, but T2000 xpndr does seem >to behave oddly if left on at shutdown. "No Comm" errors, turning itself >on before Master shut off, difficult to turn on (occasionally requires >several attemps holding power button in) but otherwise seems to work >fairly well. > >My 760 transmits very well, but reception from maybe 20% of other aircraft >(ATC and unicoms always come in well) typically with older radios, is >garbled in varying degrees and on rare occasions almost >non-existent. Haven't been able to resolve yet- curious if others >experience this. Hmmm. . . it would be really interesting to bench check some of these "problem" radios. I think I'll put a nice signal generator in my letter to Santa Claus. > Close formation reception is often garbled- added resistor to antenna > line as discussed here some time ago (thanks Bob!) helped quite a bit, > but will upsize resistor at next opportunity & see if improves... Let us know what size resistor you ultimately find adequate. Thanks! Bob . . . ________________________________ Message 5 _____________________________________ Time: 06:50:42 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Dead Horses don't die... --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" Inquiry: I have on order from an avionics installer a GNS430, SL30 and GTX327- I wish to avoid a separate avionics bus and plan to power these from my endurance bus fuseblock, which is hot whenever the master contactor is on per Bob Nuckolls' AeroElectric Connection system architecture. Is this acceptable or must I make sure these units are not powered up during engine start? >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Interesting. The installation manuals for the GNS-430 and the GTX-327 claim DO-160 Category A qualification for voltage spikes (I don't have an SL-30 Installation manual to look at). Are they saying that they don't trust their test results, or that they didn't really do the test? Or that they think the real world might be worse than the DO-160 requirements? Kevin Horton RV-8 (finishing kit) Ottawa, Canada Funny you should ask. I've asked it dozens of times over the years of various promulgators of avionics master switches . . . I've yet to received a reasoned reply. Bob . . . --------------------------------------------------------- < What is so wonderful about scientific truth...is that > < the authority which determines whether there can be > < debate or not does not reside in some fraternity of > < scientists; nor is it divine. The authority rests > < with experiment. > < --Lawrence M. Krauss > --------------------------------------------------------- ________________________________ Message 6 _____________________________________ Time: 09:35:11 AM PST US Subject: AeroElectric-List: GTX327 power switching From: Erich_Weaver@URSCorp.com --> AeroElectric-List message posted by: Erich_Weaver@URSCorp.com When ordering my avionics, I noted which units had integrated power switches and which did not, so I could include power switches for those that didnt on my panel. For example, the GRT EFIS does not have a power switch, so I installed one on the panel. The GTX 327 transponder does have a power switch, so I did not include a switch for that. However, after cutting my panel, installing the avionics and proceeding to flip various switches to see that everything lights up, I have discovered that the GTX 327 comes on when I turn on the master, regardless of whether I turned the unit off the last time I used it. So, if I want the unit off before engine start, I will have to reach up and turn it off, when in my mind at least, it should already be off because thats how I left it the last time I used it. A minor inconvenience, but irritating to me, and I dont really want to add another panel switch. Does anyone know whether there is something in the GTX327 instrument set up that will allow me to change the default setting to power off instead of power on? thank you Erich Weaver ________________________________ Message 7 _____________________________________ Time: 03:07:42 PM PST US From: Ken Subject: AeroElectric-List: BNC angle adapter doesn't fit --> AeroElectric-List message posted by: Ken Thought I'd mention that the BNC angle adapter that I had in stock would not fit my TED transponder antenna. It's likely a low cost import adapter. In fact though none of the angle adapters in two local stores would push on far enough even though all the straight connectors that I tried fit fine. A minor mystery as I have not been able to figure out why they won't push on far enough despite being willing to do some surgery. Wish I'd known sooner as I just received an order from Steinair today and would have ordered one of theirs if I'd known mine wouldn't fit ;( Ken ________________________________ Message 8 _____________________________________ Time: 07:36:15 PM PST US From: Matt Dralle Subject: AeroElectric-List: Matronics Email List Fund Raiser - November! --> AeroElectric-List message posted by: Matt Dralle Dear Listers, Each November I hold a PBS-like fund raiser to support the continued operation and upgrade of the List services at Matronics. It's through these sole Contributions of List members that these Matronics Lists are possible. You have probably noticed that there are no banner ads or pop-up windows on any of the Matronics Lists or related web sites such as the Forums site ( http://forums.matronics.com ), Wiki site ( http://wiki.matronics.com ), or other related pages such as the List Search Engine ( http://www.matornics.com/search ), List Browse ( http://www.matornics.com/listbrowse ), etc. This is because I believe in a List experience that is completely about the sport we all enjoy - namely Airplanes and not about annoying advertisments. During the month of November I will be sending out List messages every few days reminding everyone that the Fund Raiser is underway. Each message will generally highlight a particular feature or benefit of the Matronics Lists or detail a new feature or service that was added this year. I ask for your patience and understanding during the Fund Raiser and throughout these regular messages. The Fund Raiser is only financial support mechanism I have to pay all of the bills associated with running these lists. Once again, this year I've got a terrific line up of free gifts to go along with the various Contribution levels. Most all of these gifts have been provided by some of the vary members and vendors that you'll find on Matronics Lists and have been either donated or provided at substantially discounted rates. This year, these generous people include Bob Nuckolls of the AeroElectric Connection (http://www.aeroelectric.com/), Paul Besing of Aeroware Enterprises aka Kitlog Pro (http://www.kitlog.com/), Andy Gold of the Builder's Bookstore (http://www.buildersbooks.com/), and Jon Croke of HomebuiltHELP (http://www.homebuilthelp.com/). These are extremely generous guys and I encourage you to visit their respective web sites. Each one offers a unique and very useful aviation-related product line. I would like publicly to thank Bob, Paul, Andy, and Jon for their generous support of the Lists again this year!! You can make your List Contribution using any one of three secure methods this year including using a credit card, PayPal, or by personal check. All three methods afford you the opportunity to select one of this year's free gifts with a qualifying Contribution amount!! To make your Contribution, please visit the secure site below: https://www.matronics.com/contribution I would like to thank everyone in advance for their generous financial AND moral support over the years. I know it sounds a little cliche, but you guys really do feel like family. Thank you for your support! Matt Dralle Matronics Email List Administrator