---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Mon 06/18/18: 8 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:40 AM - Re: Re: Z19 first try and smoke/wire melted I did a mistake (Robert L. Nuckolls, III) 2. 10:38 AM - Re: Z19 first try and smoke/wire melted I did a mistake (Achille) 3. 12:17 PM - Re: Alternator Noise When Touching Metal Airframe Grounds (Jared Yates) 4. 01:51 PM - Re: Alternator Noise When Touching Metal Airframe Grounds (Robert L. Nuckolls, III) 5. 01:54 PM - Re: Re: Z19 first try and smoke/wire melted I did a mistake (Robert L. Nuckolls, III) 6. 02:07 PM - Re: Re: Rotax Charging System (William Daniell) 7. 03:38 PM - Re: Rotax Charging System (user9253) 8. 07:28 PM - Re: Rotax Charging System (user9253) ________________________________ Message 1 _____________________________________ Time: 06:40:35 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Re: Z19 first try and smoke/wire melted I did a mistake At 03:52 PM 6/17/2018, you wrote: > >It does not matter what kind of arc suppression device is in >parallel with the contactor coil. That coil is going to energize >when the switch is turned on (unless the master switch wire burns >open). A diode in series with the contactor coil would prevent it >from being energized by a reverse polarity battery. If a builder >were concerned about reverse polarity, two diodes could be used, one >in parallel with the coil and one in series. But what about >protection against line boys with 24 volt jumper cables? Yeah, I had a line-crew feller hook 28v to my 14v 172XP for a start assist on a -5C morning in KC. He had his back turned to me and the WWII surplus, gas driven generator was pretty noisy so yelling was futile. I hit the starter and got a really energetic engine start. Only then did he hit the disconnect switch never having looked at me. I wanted to get out and . . . well . . . but that would have called for stopping the engine. A quick check of the panel didn't show evidence of damage so I chalked it up to experience and future planning: Me: You know this is a 14v airplane, right? LB: Sure Me: you know that you're not to take your eyes off me, or take your fingers off the switch at any time external power is on the airplane? LB: Yeah, sure. Me: You know that power doesn't go ON until I give you a thumbs up? LB: I can do that. Me; You know that thumbs down means turn it OFF? Lb: Okay. Me: You're a bright fellow. Then I tip him $5 and invite him to have a beer on me. REAL airplanes have ground power jacks fitted with polarity protection, ov protection and CREW CONTROLLED ground power contactors. https://goo.gl/xzixnk https://goo.gl/CbPgUw Bob . . . ________________________________ Message 2 _____________________________________ Time: 10:38:53 AM PST US Subject: AeroElectric-List: Re: Z19 first try and smoke/wire melted I did a mistake From: "Achille" I will advise you this weekend I will asses. The contactor wire is the only one that is alone, so it will be easy to change it if it's the only one that could be damage. In my mind it don't keep clear my mistake that it do du to lack of knowledge. I will see. For the protection i checked user manuel the only one things that have a protection for reversal is my old becker AR3201 that I have to change it before august 2018 du to eupean rules.. I hope you have right bob and I have no doubt. Just i did the quote in case of... I was thinking about one things. My ignitions have the case grounded and have the ground wire, both are grounded on the ground buses. I don't have short cut the ignition module ? Read this topic online here: http://forums.matronics.com/viewtopic.php?p=480966#480966 Attachments: http://forums.matronics.com//files/capture_decran_2018_06_18_a_193042_250.png ________________________________ Message 3 _____________________________________ Time: 12:17:34 PM PST US From: Jared Yates Subject: Re: AeroElectric-List: Alternator Noise When Touching Metal Airframe Grounds Thanks Bob and everyone, I'm back with new data, having returned to the airplane and flown it today. Disregard what I said before about the volume- the noise is not impacted by the local headset volume or by the intercom volume, or the 430 volume. It seems to be not adjustable at all. It does not seem to be present when the engine is not running, but then again the alternator noise is the majority of the noise, and it would not be present with the engine off. On Tue, Jun 12, 2018 at 6:13 PM, Robert L. Nuckolls, III < nuckolls.bob@aeroelectric.com> wrote: > At 03:01 PM 6/12/2018, you wrote: > > Yes, and also a gns430w and skyview system. > > > Just for grins . . . try unplugging the > data cable between the intercom/controll > panel and the remote transceiver . . . and > see if the noise is affected. > > Oh yeah, are you sure it's alternator whine . . . > pitch rises and falls with engine rpm? > > > Bob . . . > ________________________________ Message 4 _____________________________________ Time: 01:51:29 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Alternator Noise When Touching Metal Airframe Grounds At 02:16 PM 6/18/2018, you wrote: >Thanks Bob and everyone, I'm back with new data, having returned to >the airplane and flown it today. > >Disregard what I said before about the volume- the noise is not >impacted by the local headset volume or by the intercom volume, or >the 430 volume. It seems to be not adjustable at all. It does not >seem to be present when the engine is not running, but then again >the alternator noise is the majority of the noise, and it would not >be present with the engine off. Are these headsets noise canceling? I.e. fitted with electronics of some kind? I was looking for Bose X Model info on the 'net with no success for the quick look-see. Bob . . . ________________________________ Message 5 _____________________________________ Time: 01:54:35 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Re: Z19 first try and smoke/wire melted I did a mistake At 12:38 PM 6/18/2018, you wrote: > >I will advise you this weekend I will asses. > >The contactor wire is the only one that is alone, so it will be easy >to change it if it's the only one that could be damage. In my mind >it don't keep clear my mistake that it do du to lack of knowledge. I will see. The only OTHER wires at risk would be those tightly bundled with the damaged wire. Even so, the 'damage' may be limited to staining of the insulation. If there are no wires in close proximity to the damaged one, then you're home almost free. Bob . . . ________________________________ Message 6 _____________________________________ Time: 02:07:11 PM PST US From: William Daniell Subject: Re: AeroElectric-List: Re: Rotax Charging System Joe, can you confirm wiring for the JD voltage regulator please. B+ = DC + output to capacitor and system AC = yellow wires from generator L = indicator light IGW = master? is that right? thanks Will William Daniell LONGPORT +57 310 295 0744 On Sun, Jun 10, 2018 at 11:03 AM, user9253 wrote: > > Ken, > While I have great respect for Mike M. and admire his knowledge, I do > disagree with that ending statement. Heat caused by high current can > damage alternator windings. But the total current is determined by the > load, not by the regulator. I do not think that the Silent Hektik > regulator will stress the alternator any more than the Ducati regulator. > Two years ago I replaced the Ducati regulator in my RV-12 with a cheap > John Deere regulator from eBay. I made an adapter plate using 1/8" > aluminum because the mounting holes did not line up. I used heat > conductive grease on both sides of the mounting plate. A thermocouple > attached to the John Deere regulator measured a maximum temperature of 157 > degrees Fahrenheit on a 90+ degree day. > > -------- > Joe Gores > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=480768#480768 > > ________________________________ Message 7 _____________________________________ Time: 03:38:36 PM PST US Subject: AeroElectric-List: Re: Rotax Charging System From: "user9253" Will, Yes, you are correct. -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=480974#480974 ________________________________ Message 8 _____________________________________ Time: 07:28:17 PM PST US Subject: AeroElectric-List: Re: Rotax Charging System From: "user9253" Use heat conductive paste between the regulator and aluminum airframe or heat sink. The regulator case should be well grounded. Some installers connect a ground wire to one of the mounting bolts. Forced air cooling will prolong regulator life. -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=480977#480977 ------------------------------------------------------------------------------------- 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.