---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Mon 02/18/08: 8 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 09:07 AM - Re: TurboCAD format files (jayb) 2. 04:35 PM - Z-19 and multiple busses (Corey Crawford) 3. 05:33 PM - Re: Re: TurboCAD format files (Robert L. Nuckolls, III) 4. 05:35 PM - Re: Z-19 and multiple busses (Robert L. Nuckolls, III) 5. 06:12 PM - Re: Z-19 and multiple busses (Corey Crawford) 6. 06:28 PM - Dynon d-180 audio alarm output to King aux audio in (Vince-Himsl) 7. 08:04 PM - Re: Z-19 and multiple busses (Robert L. Nuckolls, III) 8. 08:04 PM - Re: Dynon d-180 audio alarm output to King aux audio in (Robert L. Nuckolls, III) ________________________________ Message 1 _____________________________________ Time: 09:07:46 AM PST US Subject: AeroElectric-List: Re: TurboCAD format files From: "jayb" Using v14.2, this scenario was very repeatable on my WinXP machine. Open up the seminar.dwg from AEC11. Make a change, save (as .dwg format) and then close the file. Do this until the file gets to be ~1.5MB. At this point, opening the .dwg file takes longer and longer. Sometimes the file opens after a really long time, but usually the program just hangs forever. Now your data is "gone" and the file is corrupted... Look at the running application when this happens using Task Mgr. You will see that TurboCAD consumed memory size just keeps growing and growing as there's a memory leak. More annoying is the occasional program faults seen during cut+paste or save operations. TurboCAD support confirmed the above as a known bug when using .dwg AutoCAD formatted files. The fix is only available in v15 - you get to buy it again (not!). No issues where seen doing the above steps after saving the AutoCAD format seminar.dwg file as a TurboCAD format .tcw file. Jay do not archive Read this topic online here: http://forums.matronics.com/viewtopic.php?p=164807#164807 ________________________________ Message 2 _____________________________________ Time: 04:35:07 PM PST US From: "Corey Crawford" Subject: AeroElectric-List: Z-19 and multiple busses Hello, I'm looking to use the Z-19 drawings to create the electrical system to power my electrically-dependent Subaru engine and had a question: Is there a reason I shouldn't go with a single engine bus that's fed by both batteries, with diodes to prevent a bad battery from sucking in all the juice? The Z-19's show one bus per battery and then using a diode bridge for each component - this would move the diodes between the battery and the bus, instead of being placed between the bus(ses) and the individual components. Comments? -- Corey Crawford ________________________________ Message 3 _____________________________________ Time: 05:33:11 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Re: TurboCAD format files At 09:01 AM 2/18/2008 -0800, you wrote: > >Using v14.2, this scenario was very repeatable on my WinXP machine. Open >up the seminar.dwg from AEC11. > >Make a change, save (as .dwg format) and then close the file. Do this >until the file gets to be ~1.5MB. At this point, opening the .dwg file >takes longer and longer. Sometimes the file opens after a really long >time, but usually the program just hangs forever. Now your data is "gone" >and the file is corrupted... Look at the running application when this >happens using Task Mgr. You will see that TurboCAD consumed memory size >just keeps growing and growing as there's a memory leak. More annoying is >the occasional program faults seen during cut+paste or save operations. > >TurboCAD support confirmed the above as a known bug when using .dwg >AutoCAD formatted files. The fix is only available in v15 - you get to buy >it again (not!). > >No issues where seen doing the above steps after saving the AutoCAD format >seminar.dwg file as a TurboCAD format .tcw file. Don't save as .dwg If TurboCAD is your vehicle of choice, there's no value in causing it to open work product in one language, interpret its native language for editing and then converting back to the source language for storage. Use the .dwg files as a one-time source and let TurboCAD do what it does best after that. Bob . . . ________________________________ Message 4 _____________________________________ Time: 05:35:36 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Z-19 and multiple busses At 05:26 PM 2/18/2008 -0700, you wrote: >Hello, > >I'm looking to use the Z-19 drawings to create the electrical system to >power my electrically-dependent Subaru engine and had a question: > >Is there a reason I shouldn't go with a single engine bus that's fed by >both batteries, with diodes to prevent a bad battery from sucking in all >the juice? Batteries don't go bad in ways that "suck juice". I presume that since your airplane is decidedly dependent on 100.0% availability of power, you'll not only use modern, RG batteries . . . you'll make at least some effort to see that they're discarded for lack of capacity . . . which will happen long before they don't crank the engine. >The Z-19's show one bus per battery and then using a diode bridge for each >component - this would move the diodes between the battery and the bus, >instead of being placed between the bus(ses) and the individual components. The dual diodes are intended to isolate a battery with higher state of charge from being tapped by the equipment that has reduced the other battery to a lower state of charge. It's not batteries that are the energy thieves . . . it's stuff you have turned on. Bob . . . ----------------------------------------) ( . . . a long habit of not thinking ) ( a thing wrong, gives it a superficial ) ( appearance of being right . . . ) ( ) ( -Thomas Paine 1776- ) ---------------------------------------- ________________________________ Message 5 _____________________________________ Time: 06:12:59 PM PST US From: "Corey Crawford" Subject: Re: AeroElectric-List: Z-19 and multiple busses On Feb 18, 2008 6:32 PM, Robert L. Nuckolls, III wrote: > The dual diodes are intended to isolate a battery > with higher state of charge from being tapped by > the equipment that has reduced the other battery > to a lower state of charge. It's not batteries that > are the energy thieves . . . it's stuff you have > turned on. > I think I got it .. the diodes prevent the Main Battery from being used by components on the Engine Bus and vise versa. If the two busses would feed the exact same components, is there any reason to separate them? The only thing I'd lose is not being able to isolate a battery, or am I missing something? (I'm not sure being able to isolate a single battery is very helpful in this scenario - the whole engine can be isolated with the dc power switch if needed). Thanks! :) -- Corey Crawford ________________________________ Message 6 _____________________________________ Time: 06:28:32 PM PST US From: "Vince-Himsl" Subject: AeroElectric-List: Dynon d-180 audio alarm output to King aux audio in Hello, I have a King KY96A comm/receiver and a Dynon D-180. The Dynon has two audio alarm out wires that I tie together and feed to a 10kohm pot. The center tap is in turn fed to an 'intercom' which I don't have. But I have noticed that on the schematic for the King KY96a there are three 'aux audio in' connection inputs. Can one just connect the dynon alarm inputs (via the pot) to one of these? Or more to the point, does anyone know exactly what those 'aux audio in' inputs do? Thanks, Vince H. RV8-wiring ________________________________ Message 7 _____________________________________ Time: 08:04:57 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Z-19 and multiple busses At 07:09 PM 2/18/2008 -0700, you wrote: >On Feb 18, 2008 6:32 PM, Robert L. Nuckolls, III ><nuckolls.bob@cox.net> wrote: >> The dual diodes are intended to isolate a battery >> with higher state of charge from being tapped by >> the equipment that has reduced the other battery >> to a lower state of charge. It's not batteries that >> are the energy thieves . . . it's stuff you have >> turned on. > >I think I got it .. the diodes prevent the Main Battery from being used by >components on the Engine Bus and vise versa. If the two busses would feed >the exact same components, is there any reason to separate them? The only >thing I'd lose is not being able to isolate a battery, or am I missing >something? (I'm not sure being able to isolate a single battery is very >helpful in this scenario - the whole engine can be isolated with the dc >power switch if needed). I'm not sure about your desire to "isolate a battery". When the alternator quits, the energy available is finite and contained totally within the battery(ies). When the low volts warning light comes on, wiring per Z-19 requires no action on the part of the pilot except to close the endurance bus alternate feed switch and open both battery master switches. Then make preparations for a no-alternator en-route phase of flight followed by approach to comfortable landing. Once your comfortable landing is assured (short final over the numbers) close the master relays and run as much "stuff" as you like to complete the flight. Normal operations are with the primary engine power switch ON and the secondary switch off. Assuming you've done your homework and have a considered preventative maintenance program for batteries, then you KNOW how long you can operate battery only in the endurance mode. If you have not done your homework and find that the engine is not running well for as long as you anticipated, you may have to close the secondary power switch to allow the main battery to support the engine. If the engine battery's lack of capacity proves to be a surprise, then the main battery's true condition is probably a mystery too . . . it's time to call it an emergency. The design goal is to minimize in-flight diagnostics, switch flipping and other distractions that prevent you from doing your best as a pilot. With a modicum of planning it's a no-sweat deal. Bob . . . ----------------------------------------) ( . . . a long habit of not thinking ) ( a thing wrong, gives it a superficial ) ( appearance of being right . . . ) ( ) ( -Thomas Paine 1776- ) ---------------------------------------- ________________________________ Message 8 _____________________________________ Time: 08:04:57 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Dynon d-180 audio alarm output to King aux audio in At 06:24 PM 2/18/2008 -0800, you wrote: > >Hello, >I have a King KY96A comm/receiver and a Dynon D-180. > >The Dynon has two audio alarm out wires that I tie together and feed to a >10kohm pot. The center tap is in turn fed to an 'intercom' which I don't >have. > >But I have noticed that on the schematic for the King KY96a there are three >'aux audio in' connection inputs. > >Can one just connect the dynon alarm inputs (via the pot) to one of these? > >Or more to the point, does anyone know exactly what those 'aux audio in' >inputs do? Just what you want. Run your alarm tones to these inputs through gain control potentiometers. Bob . . . ------------------------------------------------------------------------------------- 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.