---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Mon 03/21/11: 9 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:51 AM - Re: Switch Selection (Robert L. Nuckolls, III) 2. 07:59 AM - Re: Switch Selection () 3. 08:23 AM - Re: Switch Selection (John Grosse) 4. 09:05 AM - Re: Switch Selection () 5. 09:48 AM - HD pin crimp adapter (Kenneth Melvin) 6. 12:22 PM - Re: HD pin crimp adapter (Robert L. Nuckolls, III) 7. 12:32 PM - Re: Switch Selection (Robert L. Nuckolls, III) 8. 01:10 PM - Re: Switch Selection () 9. 07:01 PM - Re: Switch Selection (Robert L. Nuckolls, III) ________________________________ Message 1 _____________________________________ Time: 06:51:29 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Switch Selection At 09:27 PM 3/20/2011, you wrote: >All, > >I have a EI that I want to provide power to from two sources (main >battery and alt battery). why? >Would using a 1-3 switch be ok for this application? ON-OFF-ON yes >I'm thinking... > >Terminal 1 - From Batt Bus (Primary) > >Terminal 2 - EI Lead (grounded separately) > >Terminal 3 - From alternate Battery. (Emergency) If you've got a well maintained and failure tolerant system, you won't have an electrical 'emergency'. Under what conceivable scenario do you believe you're going to loose the main battery as a source of ignition system power? Bob . . . ________________________________ Message 2 _____________________________________ Time: 07:59:03 AM PST US Subject: RE: AeroElectric-List: Switch Selection From: Bob, This would happen is if the battery connection became loose, the 5 amp panel breaker switch failed, the switch wire comes loose behind the panel or it blows my inline 20 AMP fuse (near the battery) that I have in front of the 5 amp breaker switch which protects the line from major overload. The alternate battery concept is a suggested design from Lightspeed. There needs to be a way to switch between the two. Naturally if there is any break in electrical power, the EI goes away immediately and you're in instant do-do. If the Lightspeed were really well designed it would sense a loss of power go directly to backup power and alert the driver to the fact. This is not the case. If on take-off my breaker switch decides to give up the ghost, I've just lost 1 EI. Paranoid? Maybe, but it does happen. Yesterday, the switch I used to change between normal battery power and backup battery power died just as I was beginning my run-up. Glad that happened on the ground and not at 50 feet above the ground. If flying at altitude I could have easily switched to backup power and everything would have went along fine (assuming the switch is OK). So bottom line is that any loss of power and you lose a very critical component. I'm not talking here about losing a light or a radio or whatever (they don't make the engine run). Glenn E. Long -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Robert L. Nuckolls, III Sent: Monday, March 21, 2011 8:46 AM Subject: Re: AeroElectric-List: Switch Selection At 09:27 PM 3/20/2011, you wrote: >All, > >I have a EI that I want to provide power to from two sources (main >battery and alt battery). why? >Would using a 1-3 switch be ok for this application? ON-OFF-ON yes >I'm thinking... > >Terminal 1 - From Batt Bus (Primary) > >Terminal 2 - EI Lead (grounded separately) > >Terminal 3 - From alternate Battery. (Emergency) If you've got a well maintained and failure tolerant system, you won't have an electrical 'emergency'. Under what conceivable scenario do you believe you're going to loose the main battery as a source of ignition system power? Bob . . . ________________________________ Message 3 _____________________________________ Time: 08:23:02 AM PST US From: John Grosse Subject: Re: AeroElectric-List: Switch Selection Which is exactly why I said you don't want ONE switch. Give each battery its own switch. John Grosse > ------------------------------------------------------------------------ > > longg@pjm.com > March 21, 2011 9:55 AM > > > --> AeroElectric-List message posted by: > > Bob, > > Yesterday, the switch I used to change between normal battery power and > backup battery power died just as I was beginning my run-up. > > Glenn E. Long > ________________________________ Message 4 _____________________________________ Time: 09:05:01 AM PST US Subject: RE: AeroElectric-List: Switch Selection From: Thanks John, Sorry, I missed your earlier comment somewhere. Yes, that would be a more secure/separable option. I'm open to good ideas and not afraid to change for the better. I'm also a bit tired of paying good money for switches that offer lots of capability but later fail as a result of it. Single pole is simple and usually works - even if it means a few more switches. Glenn E. Long -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of John Grosse Sent: Monday, March 21, 2011 11:18 AM Subject: Re: AeroElectric-List: Switch Selection Which is exactly why I said you don't want ONE switch. Give each battery its own switch. John Grosse > ------------------------------------------------------------------------ > > longg@pjm.com > March 21, 2011 9:55 AM > > > --> AeroElectric-List message posted by: > > Bob, > > Yesterday, the switch I used to change between normal battery power and > backup battery power died just as I was beginning my run-up. > > Glenn E. Long > ________________________________ Message 5 _____________________________________ Time: 09:48:25 AM PST US From: Kenneth Melvin Subject: AeroElectric-List: HD pin crimp adapter Bob, I have just received your adapter for the HD pin crimp, and need guidance as to how to use it. I have the pre-calibrated d-sub crimper from you, an Astro, and a Buchanan crimper. I can send a photo of the three if it would help, but would need your email address for that. Yours, Kenneth ________________________________ Message 6 _____________________________________ Time: 12:22:00 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: HD pin crimp adapter At 12:44 PM 3/21/2011, you wrote: > >Bob, I have just received your adapter for the HD pin crimp, and >need guidance as to how to use it. I have the pre-calibrated d-sub >crimper from you, an Astro, and a Buchanan crimper. I can send a >photo of the three if it would help, but would need your email >address for that. You unscrew the silver cap on the back side of the crimper. Under this cap you'll find a spring and a positioner for the 20AWG pins. Remove replace the 20AWG positioner with the 22HD positioner. Put the cap and spring back in place and you're ready to go with the smaller pins. Bob . . . ________________________________ Message 7 _____________________________________ Time: 12:32:25 PM PST US From: "Robert L. Nuckolls, III" Subject: RE: AeroElectric-List: Switch Selection At 10:55 AM 3/21/2011, you wrote: >If the Lightspeed were really well designed it would sense a loss of >power go directly to backup power and alert the driver to the fact. Refresh my memory. What's your engine/ignition setup for this airplane. Is the LSI system the only ignition system for the engine? Bob . . . ________________________________ Message 8 _____________________________________ Time: 01:10:23 PM PST US Subject: RE: AeroElectric-List: Switch Selection From: Bob, I had dual LSI but removed one in favor of one MAG. So, one LSI and one mag. Thanks Glenn E. Long -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Robert L. Nuckolls, III Sent: Monday, March 21, 2011 2:28 PM Subject: RE: AeroElectric-List: Switch Selection At 10:55 AM 3/21/2011, you wrote: >If the Lightspeed were really well designed it would sense a loss of >power go directly to backup power and alert the driver to the fact. Refresh my memory. What's your engine/ignition setup for this airplane. Is the LSI system the only ignition system for the engine? Bob . . . ________________________________ Message 9 _____________________________________ Time: 07:01:37 PM PST US From: "Robert L. Nuckolls, III" Subject: RE: AeroElectric-List: Switch Selection At 04:02 PM 3/21/2011, you wrote: > >Bob, > >I had dual LSI but removed one in favor of one MAG. So, one LSI and one >mag. > >Thanks Okay, you got two ignition systems. Why the great concerns for keeping the electronic one running? You cited potential for a lot of things to get unhooked or otherwise become unusable. My best advice is keep it as simple as possible and take good care of it. Sometimes the best way to drive a nail is with a hammer. No batteries, no moving parts, works in the worst of weather conditions and it will still be functional after we're all gone. I just cleaned up one of dad's old hammers. Brightened up the head, sanded and oiled the handle and put a piece of heat shrink over it to tie down the splinters . . . good for another 60 years. 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.