---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Fri 12/27/19: 5 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 12:18 PM - 2019 List of Contributors (Matt Dralle) 2. 01:18 PM - Beech Explosion (Robert L. Nuckolls, III) 3. 01:32 PM - Re: B&C voltage regulator low voltage warning (ADDENDUM) (Robert L. Nuckolls, III) 4. 01:48 PM - Re: Beech Explosion (Ed Gilroy) 5. 02:39 PM - Re: B&C voltage regulator low voltage warning (ADDENDUM) (Robert L. Nuckolls, III) ________________________________ Message 1 _____________________________________ Time: 12:18:32 PM PST US From: Matt Dralle Subject: AeroElectric-List: 2019 List of Contributors Dear Listers, The 2019 Matronics Email List and Forum Fund Raiser officially ended a couple of weeks ago and it's time that I published this year's List of Contributors. It is the people on this list that directly make these Email Lists and Forums possible! Their generous Contributions keep the servers and Internet connection up and running! You can still show your support this year and pick up a great gift at the same time. The Contribution Web Site is fast, easy, and secure: http://www.matronics.com/contribution Or, by dropping a personal check in the mail to: Matt Dralle / Matronics 581 Jeannie Way Livermore CA 94550 And finally, I'm proud to present The 2019 Fund Raiser List of Contributors: http://www.matronics.com/loc Thank you again to everyone that made a Contribution this year!! Matt Dralle Matronics Email List & Forum Administrator ________________________________ Message 2 _____________________________________ Time: 01:18:13 PM PST US From: "Robert L. Nuckolls, III" Subject: AeroElectric-List: Beech Explosion Wichita Beechcraft (Textron East Campus) suffered a massive explosion that's being attributed to a malfunction in a liquid nitrogen system https://tinyurl.com/roo35fk My brother-in-law who lives blocks from the facility tells me it really rattled his house and shook the ground. Pictures in the links above show a massive energy release that disassembled one end of Beechcraft Plant III and damaged the building just south which I think used to be a finishing (interiors and exterior paint) facility. Thankfully, only a hand full of holiday crews were on site at the time. 15 injured of which 11 were transported . . . one was 'serious'. I've never heard of a 'nitrogen' explosion not involving an extothermic reaction . . . but I don't think there was any combustion associated with the event. Bob . . . ________________________________ Message 3 _____________________________________ Time: 01:32:35 PM PST US From: "Robert L. Nuckolls, III" Subject: AeroElectric-List: Re: B&C voltage regulator low voltage warning (ADDENDUM) >>Hi Deems... ref: http://aeroelectric.com/Pictures/Schematics/LR3_LV_Led_1.jpg >> >> >>Deems Davis wrote: >> > I would like to subsitute an LED for the Low Voltage bulb that came with >> > the B&C LR3C-14 . I posed the question to Tim Hedding @ B&C and received >> > this in response. >> > >> > If you use an LED instead of an incandescent lamp, install a 470 >> - 510 Ohm, >> > 1/2 Watt, resistor between terminals 3 and 5 of the LR3C-14 (or >> the SB1B-14) >> > so that the LED does not glow dimly all of the time. > > Either of these techniques works . . . in fact, > Tim's suggestion is probably the most elegant. Now for the rest of the story . . . Tim's simple resistor suggestion is valid only if your proposed LED substitute has a resistor already in series with it . . . many off-the-shelf LED indicators are RATED at 12 volts and include the necessary series resistor to properly power the approx 3.5 volt LED. If you're wanting to install a rudimentary led in the as-supplied lamp fixture from B&C, you'll need to add TWO resistors wired as shown in the link above. As a general rule, I recommend converting your as-supplied fixture to LED using the rudimentary lamp Bright White LED 5mm (4 pack) These are pretty easy to build into the incandescent fixture . . . either the as-supplied or one of your own acquisition. The advantage of a DIY indicator is that you can select a high-intensity lamp (10K+ MCD) for sunlight viewability. If anyone needs a high-output lamp for their project, drop me an address and I'll fix you up. I have RED, AMBER, WHITE, BLUE and GREEN high-intensity lamps on hand. Bob . . . ________________________________ Message 4 _____________________________________ Time: 01:48:44 PM PST US From: Ed Gilroy Subject: Re: AeroElectric-List: Beech Explosion The news said something about a 4 inch gas main being breached by the nitrogen release. On Fri, Dec 27, 2019 at 4:23 PM Robert L. Nuckolls, III < nuckolls.bob@aeroelectric.com> wrote: > nuckolls.bob@aeroelectric.com> > > > Wichita Beechcraft (Textron East Campus) suffered > a massive explosion that's being attributed to > a malfunction in a liquid nitrogen system > > > https://tinyurl.com/roo35fk > > My brother-in-law who lives blocks from the facility > tells me it really rattled his house and shook the > ground. > > Pictures in the links above show a massive energy > release that disassembled one end of Beechcraft > Plant III and damaged the building just south > which I think used to be a finishing (interiors > and exterior paint) facility. > > Thankfully, only a hand full of holiday crews > were on site at the time. 15 injured of which > 11 were transported . . . one was 'serious'. > > I've never heard of a 'nitrogen' explosion not > involving an extothermic reaction . . . but I > don't think there was any combustion associated > with the event. > > > Bob . . . > > ________________________________ Message 5 _____________________________________ Time: 02:39:04 PM PST US From: "Robert L. Nuckolls, III" Subject: AeroElectric-List: Re: B&C voltage regulator low voltage warning (ADDENDUM) >>Hi Deems... ref: http://aeroelectric.com/Pictures/Schematics/LR3_LV_Led_1.jpg >> >> >>Deems Davis wrote: >> > I would like to subsitute an LED for the Low Voltage bulb that came with >> > the B&C LR3C-14 . I posed the question to Tim Hedding @ B&C and received >> > this in response. >> > >> > If you use an LED instead of an incandescent lamp, install a 470 >> - 510 Ohm, >> > 1/2 Watt, resistor between terminals 3 and 5 of the LR3C-14 (or >> the SB1B-14) >> > so that the LED does not glow dimly all of the time. > > Either of these techniques works . . . in fact, > Tim's suggestion is probably the most elegant. Now for the rest of the story . . . Tim's simple resistor suggestion is valid only if your proposed LED substitute has a resistor already in series with it . . . many off-the-shelf LED indicators are RATED at 12 volts and include the necessary series resistor to properly power the approx 3.5 volt LED. If you're wanting to install a rudimentary led in the as-supplied lamp fixture from B&C, you'll need to add TWO resistors wired as shown in the link above. As a general rule, I recommend converting your as-supplied fixture to LED using the rudimentary lamp Bright White LED 5mm (4 pack) These are pretty easy to build into the incandescent fixture . . . either the as-supplied or one of your own acquisition. The advantage of a DIY indicator is that you can select a high-intensity lamp (10K+ MCD) for sunlight viewability. If anyone needs a high-output lamp for their project, drop me an address and I'll fix you up. I have RED, AMBER, WHITE, BLUE and GREEN high-intensity lamps on hand. 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.