---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Sun 07/22/07: 11 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 03:01 AM - Re: Avionics master switch/relay (Steve Glasgow) 2. 05:56 AM - My iPaq and Anywhere Map is on eBay. (Harley) 3. 06:27 AM - Semi-Custom Products (Ken) 4. 12:20 PM - http://smartaircraftsystems.com/ (Jerry2DT@aol.com) 5. 12:48 PM - Re:EGT sensor installation location (Jerry2DT@aol.com) 6. 02:14 PM - Re: Avionics master switch/relay (Peter Pengilly) 7. 03:55 PM - Re: EGT sensor installation location (jdalton77) 8. 04:46 PM - Double-shielded coax (Andrew Olech) 9. 05:56 PM - Re: Perihelion Power Protector Proposal () 10. 09:58 PM - Firewall shields (DEAN PSIROPOULOS) 11. 11:20 PM - Re: DG Short (Nick1) ________________________________ Message 1 _____________________________________ Time: 03:01:05 AM PST US From: "Steve Glasgow" Subject: Re: AeroElectric-List: Avionics master switch/relay Why not make the endurance bus and the avionics bus one and the same. On a friends RV7 we are doing this. He has a 60 A B&C alternator and a 20 A B&C standby alternator. The avionics/endurance bus is fed from the Main Bus through a diode and a S704-1 B&C relay switching circuit. Additionally, the avionics/endurance bus can be fed from the Battery Bus through another S704-1 relay switching circuit. Schematics available on request. Steve Glasgow-Cappy N123SG RV-8 Cappy's Toy ________________________________ Message 2 _____________________________________ Time: 05:56:28 AM PST US From: Harley Subject: AeroElectric-List: My iPaq and Anywhere Map is on eBay. Morning, everyone... Being the impulse buyer that I am, I couldn't resist getting the latest and greatest from Control Vision. And since it came bundled with Anywhere Map installed, built in GPS, two mounts and all the other bells and whistles that I already have with the previous Anywhere Map system I got from them, I now have two almost identical units. So, I am selling the older iPaq on eBay, with everything that I got with it, and more, to hope to offset the cost of the new system by a dollar or two. Still works perfectly (used it last week) and the database is up to date. No reserve, starting at $10, so have a look for all the details ...most of your questions will be answered by the extensive listing and the links I've provided there. If you or someone you know is interested, it'll be selling in 10 days. You can find it here: http://tinyurl.com/yvsha3 Harley Dixon Long EZ N28EZ Canandaigua, NY ________________________________ Message 3 _____________________________________ Time: 06:27:59 AM PST US From: Ken Subject: AeroElectric-List: Semi-Custom Products Bob This may not fit into your philosophy of versatility but FWIW if I were in the market for the LV/OV control board I would prefer to see the lights and switch already mounted within the module. Second best would be a pre-wired remote panel of lights and switch or at least the option of purchasing those unassembled parts at the same time. I have learned that it is nice to have all such remote assemblies of switches or lights easily removeable as a unit for serviceability rather than mounted in individual holes in the instrument panel. In addition where I've used a single DB connector on a device for both power and a remote panel, I've found it difficult to remove the remote panel for service or modification since the connector is also hardwired to the aircraft. We have completed 130 flight hours with our Z-14 wired subaru now without any nuisance OV trips. The only electrical issue is that I recently purchased a comfortable David Clarke headset and with our fairly quiet engine, I now hear weak but annoying strobe whine that I couldn't hear in cruise with other headsets. I have already followed most of your wiring recommendations so it may take me awhile to solve this one especially since the strobes operate off a different alternator and battery as the radio and intercom. Ken >Time: 09:49:43 AM PST US >From: "Robert L. Nuckolls, III" >Subject: AeroElectric-List: Semi-Custom Products > > >I've been working on a line of new products for the >AeroElectric Connection website that will be unique >to AEC. We're going to resist being a dealer for other >folks products. > >One project utilizes an ECB and enclosure that has >features described in these two illustrations: > >http://www.aeroelectric.com/DIY/A15_Package.jpg > >http://www.aeroelectric.com/DIY/Do-Much_Board_Schematic.pdf > > >The schematic would never have ALL components installed, >and in some cases, components left of are replaced with >solid jumpers. However, depending on what parts are installed, >their values, and what software is installed in the microcontroller, >we can craft a variety of products with 98% commonality >of bill of materials. > >The first product to be offered under this design and >marketing philosophy is described at: > >http://www.aeroelectric.com/Catalog/AEC/9011/9011-700-1C.pdf > >. . . except that it will have a 15-pin connector on it >instead of a 9-pin. > >I'm publishing the schematic for the more technically >inclined. Perhaps the architecture will suggest an application >close to your own wishes for a smart black box to do some >task. If so, let's talk about it and see if my software >guy can't whip it out in reasonably short order and save >you a lot of development time to craft a nicely packaged >electro-whizzy. Or, if you want to do your own byte-pudding >I could offer you a kit of ECB and enclosure from which >you could move your project ahead. > > > Bob . . . > > ________________________________ Message 4 _____________________________________ Time: 12:20:09 PM PST US From: Jerry2DT@aol.com Subject: AeroElectric-List: http://smartaircraftsystems.com/ List, This new product just popped up on the radar. What do you all think, does it show potential? Jerry Cochran Here is the web site for the new Smart Aircraft Management Systems, "SAMS" _http://smartaircrafhttp://smhttp_ (http://smartaircraftsystems.com/) Still preliminary and lots of housekeeping and text editing but its basically complete. This is a all solid state electrical system with no relays mechanical CB, fuses, or contactors in the power path from the battery (s) to the end user equipment, Integrated into this system is a complete fault detection and warning system that includes relational logic to detect and warn if two or more monitored conditions exist that alone is not a fault but the specific combination of conditions will generate a fault. Both Visual and Audible warnings are available. This fault detection system includes the ability to have different levels of limit checking and the modules are interconnected using the automotive type CAN serial bus. This fault system is independent of the hardwired electrical power system for reliability. With solid state switches and built in over current protection the result is a simple to wire electrical system. Its been in work for several years. Feel free to ask questions. Paul ************************************** Get a sneak peek of the all-new AOL at http://discover.aol.com/memed/aolcom30tour ________________________________ Message 5 _____________________________________ Time: 12:48:24 PM PST US From: Jerry2DT@aol.com Subject: AeroElectric-List: Re:EGT sensor installation location I put mine all about 1.5" down from the exhaust flange. I would angle them back about 45 deg. I didn't and it's easy to bump then when doing maint. Jerry Cochran Time: 08:50:28 PM PST US Subject: AeroElectric-List: EGT sensor installation location From: ruruny@aol.com Looking at the 2 attached pics of the left and right side of my engine, what would be the best place to install the EGT sensors. Just thought I'd get some input from anyone who might know if there is a best way to do it.?There are 4 of them for my GRT EIS. Thanks Brian 701Builder.com ************************************** Get a sneak peek of the all-new AOL at http://discover.aol.com/memed/aolcom30tour ________________________________ Message 6 _____________________________________ Time: 02:14:25 PM PST US From: "Peter Pengilly" Subject: RE: AeroElectric-List: Avionics master switch/relay Ed, If you still want to use an avionics master after reading all Bob has written you could try using 2 avionics buses, each energized by a relay both of which are switched by one double pole switch. Put your essential avionics on one bus and provide that with power direct from the battery via an emergency switch and diode. If the emergency switch is a double pole item also it could control power to your essential/endurance, non avionic, bus as well. Please be aware that the parts count has gone up and reliability has probably gone down, and I have not tried this set up. Yours, Peter -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of jedwood@earthlink.net Sent: 21 July 2007 15:57 Subject: AeroElectric-List: Avionics master switch/relay I am wanting to use an avionics master switch or relay with my electrical system. My question is: Do I need to put all of my avionics on a separate bus then control the power to that bus by the avionics master? Also,what if I want just a portion of my avionics on my endurance bus? I have looked at all of the Z figures and cannot find an example. Thanks in advance for your help. Ed RV-7 About to hang the engine ________________________________ Message 7 _____________________________________ Time: 03:55:43 PM PST US From: "jdalton77" Subject: Re: AeroElectric-List: EGT sensor installation location Brian, I just had some installed on my 0-320 and the A&P said they had to be within 4 inches of the block. Jeff Wings ----- Original Message ----- From: ruruny@aol.com To: zenith-list@matronics.com ; aeroelectric-list@matronics.com Sent: Saturday, July 21, 2007 11:49 PM Subject: AeroElectric-List: EGT sensor installation location Looking at the 2 attached pics of the left and right side of my engine, what would be the best place to install the EGT sensors. Just thought I'd get some input from anyone who might know if there is a best way to do it. There are 4 of them for my GRT EIS. Thanks Brian 701Builder.com ------------------------------------------------------------------------- ----- ________________________________ Message 8 _____________________________________ Time: 04:46:56 PM PST US From: "Andrew Olech" Subject: AeroElectric-List: Double-shielded coax Can someone explain the benefits of double-shielded coax cable? A friend of mine mentioned it's either a requirement or strongly suggested when doing the GNS430 WAAS upgrade - so what happens, does it help reduce line loss and/or does it really reduce EMI? Also, we were discussing whether it'd be beneficial to use double shielded from the mag p-lead -> key switch -> mag ground and then subsequently grounding the outer-most shield to the airframe. I wasn't sure where to stand with this concept as I thought the idea of using a single shielded wire isolated from the A/C ground enabled current pulses going opposite ways to cancel most noise. Any thoughts will be appreciated! -Andy RV-7 FWF ________________________________ Message 9 _____________________________________ Time: 05:56:43 PM PST US From: Subject: AeroElectric-List: Re: Perihelion Power Protector Proposal >From: "Eric M. Jones" <\">emjones@charter.net>\ > >Planning the wiring of a small aircraft involves installing systems >to safeguard the buses against failure of the alternator. Nice I like it. Here are a couple of things may be to incorporate? How about 100% isolation/protection 100% of the time? The idea is an "A" system and a full time isolated "B" system. I was thinking about a DC-DC battery charger & second battery. This would make an independent "B" system from the "A" main bat and alternator system. The "B" battery charger/battery whould give continuous protection, as long as the charger did not go crazy or the "B" battery did not explode, which is unlikely. If the charger failed the battery should still be there. http://www.powerstream.com/DCC.htm No mater what happens with the alternator the battery charger will isolate. Down side is 3.3 lbs, cost, plus 2nd battery weight. You should install a manual relay to by-pass the charger and bring the "protected" "B" system on-line with the main "A" system as a back up. Jets use battery chargers for similar reasons and also because the main "A" system or systems are AC not DC. However battery chargers do isolate the DC system. ** The SECOND jewel I came across: "BatteyLink" ACR (tm) ** http://bluesea.com/category/2/products/7600 Before you all poo-poo it, it's NOT a parallel battery bank diode. It is a smart/logic controlled auto charge relay (ACR), and it isolates and protect for low and high voltage. Voltage is user settable. Click on the tabs & the hyper links (the hyper text is monochrome and not obviously hyper links at least on my screen, so hunt around the link about). This would be instead of a battery DC-DC charger. Here's the instructions: http://bluesea.com/files/resources/instructions/6330.pdf With optional switch you can override. It's not made to parallel for starting, but it can in a pinch up to 60amps. There's many ways you can incorporate this ACR into a protected essential "B" system in your wiring hierarchy. Just thoughts, Cheers George --------------------------------- Boardwalk for $500? In 2007? Ha! ________________________________ Message 10 ____________________________________ Time: 09:58:15 PM PST US From: "DEAN PSIROPOULOS" Subject: AeroElectric-List: Firewall shields Question on stainless steel firewall shields. I'm using two of them, one covers my EGT/CHT harness (8 cables each containing two individual insulated thermocouple wires surrounded by a yellow or brown cover of, I believe, tefzel). The second one covers my VM-1000 sensor cables (half dozen 4 conductor with foil shield and tefzel outer cover). The CHT/EGT hole in the stainless firewall has a plastic busing installed and the harness fits through this bushing slightly snug and the firewall shield just fits around the whole thing without having to squeeze the shield against the wires. The sensor cables make use of a hole I originally cut through the firewall for an eye-ball control cable mount. The hole is quite large and a bushing would still leave the harness not centered in the firewall shield and sitting on the thin firewall shield material. I've cleaned up the shear marks and smoothed the edges on the firewall shields but am still a bit nervous about the thin material chaffing the wires, especially the large sensor wire hole. Any thoughts/ideas on this? Am I being too paranoid? Since we can no longer procure asbestos to make gaskets to go under the shield what is everyone doing here? Are you using some sort of grommet over the edges of the stainless shields to protect your cables from chaffing....or? Thanks. Dean Psiropoulos RV-6A N197DM Last of the wiring. ________________________________ Message 11 ____________________________________ Time: 11:20:11 PM PST US Subject: AeroElectric-List: Re: DG Short From: "Nick1" Charlie, Could you give please P/N and the manufacturer of your DG? Nick Read this topic online here: http://forums.matronics.com/viewtopic.php?p=125298#125298 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.