---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Sat 08/08/20: 9 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 12:08 AM - Re: two fuses in a circuit (johnbright) 2. 06:50 AM - Re: Rotax install (meat_ball) 3. 07:57 AM - Re: two fuses in a circuit (Robert L. Nuckolls, III) 4. 08:28 AM - Re: two fuses in a circuit (Ken Ryan) 5. 09:42 AM - RG400 with RG58 (Dan Fritz) 6. 03:15 PM - Re: Re: Revmaster engine with EarthX battery (Robert L. Nuckolls, III) 7. 03:57 PM - Re: Revmaster engine with EarthX battery (dj_theis) 8. 04:50 PM - Re: RG400 with RG58 (Chuck Birdsall) 9. 05:59 PM - Re: RG400 with RG58 (Robert L. Nuckolls, III) ________________________________ Message 1 _____________________________________ Time: 12:08:12 AM PST US Subject: AeroElectric-List: Re: two fuses in a circuit From: "johnbright" Walbro 395 flow and current... the Walbro page I found had broken links to the jpg graphs but those broken links have the file name and with that one can google and get https://walbrofuelpumps.com/images/flow-charts/ In that file space is "GSL395-Flow-Chart.jpg"... attached. -------- John Bright, RV-6A, at FWF, O-360 Z-101 single batt dual alt SDS EM-5-F. john_s_bright@yahoo.com, Newport News, Va https://drive.google.com/drive/folders/1u6GeZo6pmBWsKykLNVQMvu4o1VEVyP4K Read this topic online here: http://forums.matronics.com/viewtopic.php?p=497578#497578 Attachments: http://forums.matronics.com//files/gsl395_flow_chart_373.jpg ________________________________ Message 2 _____________________________________ Time: 06:50:06 AM PST US Subject: AeroElectric-List: Re: Rotax install From: "meat_ball" Thanks again, Joe! I appreciate everyones input. Ill try to iron this out, but Im sure Ill be back with more questions. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=497580#497580 ________________________________ Message 3 _____________________________________ Time: 07:57:32 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: two fuses in a circuit If you use an LED indicator, the obligatory current limiting resistor for the LED can be installed at the 'head end' of the indicator feeder where the fuse would be located . . . putting the resistor there limits current in that feeder to milliamps even when shorted to ground. The fuse goes away. Bob . . . ________________________________ Message 4 _____________________________________ Time: 08:28:04 AM PST US From: Ken Ryan Subject: Re: AeroElectric-List: two fuses in a circuit Thanks for that Bob, and thanks Charlie for the fusing advice. On Sat, Aug 8, 2020 at 7:01 AM Robert L. Nuckolls, III < nuckolls.bob@aeroelectric.com> wrote: > If you use an LED indicator, the obligatory > current limiting resistor for the LED can > be installed at the 'head end' of the indicator > feeder where the fuse would be located . . . > putting the resistor there limits current > in that feeder to milliamps even when shorted > to ground. The fuse goes away. > > Bob . . . > ________________________________ Message 5 _____________________________________ Time: 09:42:29 AM PST US Subject: AeroElectric-List: RG400 with RG58 From: "Dan Fritz" When I started my Velocity build, I installed embedded antennas in the wings with RG58 also embedded from the wing root to the antennas. Now I need to complete the rest of the coax runs to the radios (about 12 additional feet). Is there any reason I can't use RG400 for this section of the cable, connecting the two with BNC connectors? Dan Read this topic online here: http://forums.matronics.com/viewtopic.php?p=497584#497584 ________________________________ Message 6 _____________________________________ Time: 03:15:35 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Re: Revmaster engine with EarthX battery > > >http://forums.matronics.com//files/revmaster_voltage_regulators_516.pdf > > I'm confused . . . this drawing does not illustrate location of rectifier/regulators in the system. Also, are the crowbar modules pulling down against the energy of a dynamo or energy of the battery? Bob . . . ________________________________ Message 7 _____________________________________ Time: 03:57:58 PM PST US Subject: AeroElectric-List: Re: Revmaster engine with EarthX battery From: "dj_theis" >I'm confused . . . this drawing does not illustrate >location of rectifier/regulators in the system. >Also, are the crowbar modules pulling down against >the energy of a dynamo or energy of the battery? I'm honored by your response, but crushed by the fact that my drawings are obscuring what I am trying to convey. The rectifiers / regulators are part of the circuit, depicted in the lower left and lower right. The rectifiers are modeled as a box with an SCR and a control circuit that simply open the charging path for the PM alternator. Yes, Revmaster installs two rectifiers, one for each PMA. The R/R they supply confused me at first, as they are 3 wire devices (actually shown in the Revmaster manual as two wires with the body of the recifier being grounded). I've spent a considerable amount of time trying to understand their operation and believe what I'm showing (a series, 1/2 wave rectifier / regulator for each PMA) is accurate. I'm happe to be shown the error in my understanding and depiction of the charging circuit. Maybe a better understanding will expose a weakness beyond poor heat rejection for the design. I've attached a larger drawing that shows the full circuit with your very elegant crowbar, overvoltage protection. I've not cleaned up this version so it likely has numerous wire size and details errors. If you can overlook these shortcomings, hopefully the full drawing is more easily Kind regards, Dan Theis -------- Scratch building Sonex #1362 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=497589#497589 Attachments: http://forums.matronics.com//files/z16m_revmaster_2300_r10a_pg1_176.pdf ________________________________ Message 8 _____________________________________ Time: 04:50:42 PM PST US From: Chuck Birdsall Subject: Re: AeroElectric-List: RG400 with RG58 In short - that would work just fine. The only caution I would add is that RG400 is slightly different in size than RG58. Make sure the connectors you use are compatible with the cable. A dual-crimp BNC designed for RG 58 may not fit on RG400 as 400 has dual (thus thicker) shielding. You wont know this until you try to push the crimp ferrule into position prior to final crimp. Chuck On Aug 8, 2020, at 11:50, Dan Fritz wrote: When I started my Velocity build, I installed embedded antennas in the wings with RG58 also embedded from the wing root to the antennas. Now I need to complete the rest of the coax runs to the radios (about 12 additional feet). Is there any reason I can't use RG400 for this section of the cable, connecting the two with BNC connectors? Dan Read this topic online here: http://forums.matronics.com/viewtopic.php?p=497584#497584 ________________________________ Message 9 _____________________________________ Time: 05:59:58 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: RG400 with RG58 At 06:46 PM 8/8/2020, you wrote: > >In short - that would work just fine. > >The only caution I would add is that RG400 is slightly different in size >than RG58. Make sure the connectors you use are compatible with the cable. Both are nominally 0.195" diameter and use the same connectors. The shield grip sleeve is a bit harder to push over the RG400 shields because there are 2 of them . . . but it will go. 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