AeroElectric-List Digest Archive

Wed 07/09/14


Total Messages Posted: 8



Today's Message Index:
----------------------
 
     1. 07:44 AM - wall warts (GLEN MATEJCEK)
     2. 08:47 AM - Re: Engine Fire/Compartment Temperature Alert (Eric M. Jones)
     3. 01:15 PM - Re: Re: iPod shocks (Robert L. Nuckolls, III)
     4. 02:18 PM - Re: sundry questions (Robert L. Nuckolls, III)
     5. 03:42 PM - Re: Re: sundry questions (Tim Andres)
     6. 04:39 PM - Re: Re: sundry questions (John Tipton)
     7. 05:00 PM - Re: Re: sundry questions (BobsV35B@aol.com)
     8. 07:12 PM - Re: Re: iPod shocks (David Saylor)
 
 
 


Message 1


  • INDEX
  • Back to Main INDEX
  • NEXT
  • Skip to NEXT Message
  • LIST
  • Reply to LIST Regarding this Message
  • SENDER
  • Reply to SENDER Regarding this Message
    Time: 07:44:43 AM PST US
    Subject: wall warts
    From: GLEN MATEJCEK <fly4grins@gmail.com>
    > > HI Bob- speaking of: > > ... I did get your 'tingling wall wart'... > > were you able to tinker with / learn anything from the potentially malfunctioning battery tender? Inquiring minds want to know!


    Message 2


  • INDEX
  • Back to Main INDEX
  • PREVIOUS
  • Skip to PREVIOUS Message
  • NEXT
  • Skip to NEXT Message
  • LIST
  • Reply to LIST Regarding this Message
  • SENDER
  • Reply to SENDER Regarding this Message
    Time: 08:47:26 AM PST US
    Subject: Re: Engine Fire/Compartment Temperature Alert
    From: "Eric M. Jones" <emjones@charter.net>
    Or maybe better yet: Google: fire detection techniques -------- Eric M. Jones www.PerihelionDesign.com 113 Brentwood Drive Southbridge, MA 01550 (508) 764-2072 emjones(at)charter.net Read this topic online here: http://forums.matronics.com/viewtopic.php?p=426368#426368


    Message 3


  • INDEX
  • Back to Main INDEX
  • PREVIOUS
  • Skip to PREVIOUS Message
  • NEXT
  • Skip to NEXT Message
  • LIST
  • Reply to LIST Regarding this Message
  • SENDER
  • Reply to SENDER Regarding this Message
    Time: 01:15:19 PM PST US
    From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
    Subject: Re: iPod shocks
    Got out to the lab this morning with Dave's 'tingly' wall-wart. Connected the two ac mains tabs together as one terminal. Tied all wires in a USB cable together and stuck the connector into the wall-wart's output jack. The test-set I had access to didn't offer the 1,500 VAC/ 2,200 VDC test levels commonly used for line powered equipment. Made three 'hi-pot' measurements at 250, 500 and 1000 VDC each. All the average value of measured leakage resistance was 55,000 ohms. One would have liked to test this power supply at about 2200 VDC and look for a leakage current less that 0.5 mA translating to a resistance on the order of 4.4 Megohms. The relative stability of leakage resistance over the 250-1000 VDC test range suggests that barring arc-over failure, the leakage current at 2200 volts would be on the order of 2200/55,000 = 0.04A or abut 80x the test target. I disassembled the test article to capture these images. http://tinyurl.com/oxbyprq http://tinyurl.com/oahyg4a http://tinyurl.com/pfbsxbo http://tinyurl.com/pjnwyom I'll do some additional testing to see if I can repeat Dave's measurements at the wall socket. But in any case, this particular design would probably not pass any organization's safety testing reqluirements. Bob . . .


    Message 4


  • INDEX
  • Back to Main INDEX
  • PREVIOUS
  • Skip to PREVIOUS Message
  • NEXT
  • Skip to NEXT Message
  • LIST
  • Reply to LIST Regarding this Message
  • SENDER
  • Reply to SENDER Regarding this Message
    Time: 02:18:12 PM PST US
    From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
    Subject: Re: sundry questions
    At 10:07 AM 7/9/2014, you wrote: >BTW, I've read your book. Very nice for a first time builder. Thank you. >Hope you don't mind a few questions. Not at all . . . but I would like for you to join the AeroElectric-List for any future conversation. It's always a good thing when we share these conversations with the community. >I plan on going with fuses for the majority of the circuit >protection as you recommended. When I went to your web site to find >fuse blocks and bus bars, I had a hard time navigating through the >site. Do you have an online product catalog, or is that something I >have to buy? When I clicked on the link the first time, an order >form came up. I tried again at a later time and finally made it to >the fuse block section, but the pdf descriptions that came up was >hardly readable. I don't sell any hardware at present. I have in the past but right now, B&C at http://bandc.biz has the vast majority of my legacy products and merchandise. I'm talking with them about upgrades to products and getting some new items. Time is my tight commodity. I'm contracting for Beech/Cessna/Hawker and there aren't very many gray-beards around to remember how and why some things were done . . . waayyyyy back when. >I'm a vfr only pilot and am considering surface mounting an I-pad >mini on the dash as a backup. It would run Foreflight and >communicate with a Stratus Two. I've heard the pads tend to >overheat and was thinking about installing a cooling fan behind it >in the panel. Do you have any thoughts on this? What type fan >should I use to avoid RFI, etc? How many cfm? Do you have a >simpler idea, or am I needlessly worrying about the overheating problem? Folks on the List can better sources of information on this than I. I'm surprised about 'heat issues' . . . these things draw about 3-5 watts in operation, the vast majority of which gets turned into heat. Unless there are items with localized heat-dissipation issues (doubtful for a hand-held device), I would not expect there to be any problems for operational heating. However, these things are not designed to RESIDE on a panel of an airplane parked out in the sun. I sure wouldn't leave one in a parked airplane. >The other thing I was looking for was 12v usb port I could hardwire >near my panel (not a cigarette lighter adapter) so the pad would be >charged while in flight. Blue Sea makes usb ports for marine >application that looks good, but didn't know if you had any. That's a popular topic on the List. A number of builders have tried various commercial off the self 12v/USB power adapters with varying degrees of success. Depending on how handy you are with a soldering iron, you could craft an airplane- friendly, 14V to 5VUSB adapter starting with a reasonably robust assembly as a core . . . something like these . . . http://tinyurl.com/ovowqbu http://tinyurl.com/px42t7f . . . mounted in a metal enclosure and fitted with sure-to-work filters and over-load protection. Alternatively, something like this . . . http://tinyurl.com/pbvmbb3 . . . might be just fine in terms of performance and noise . . . you'd just have to try it. >I also read your article on using shielded cable for the LIghtspeed >electronic ignition instead of the coax. The use of epoxy to seal >the wiring seemed like a pain and was wondering if using a tighter >fitting, larger shielded wire with shrink wrapping would be ok. Are >the reasons for not using larger cable expense, flexibility, and weight? Klaus had a cow when I wrote that article . . . seems that coax cable was necessary if the system were going to generate 2" long sparks between coil towers. Going to shielded wire dropped the output to 1.5" sparks. Still about 100x more than needed to make the engine run but I'll have to concede a 'drop in performance'. The original problem with coax was his recommendation for using RG-58 . . . with insulation that drips off the wire when you try to solder it. He has since revised his recommendation to RG-400 coax . . . modern, hi-temp insulation. Bob . . .


    Message 5


  • INDEX
  • Back to Main INDEX
  • PREVIOUS
  • Skip to PREVIOUS Message
  • NEXT
  • Skip to NEXT Message
  • LIST
  • Reply to LIST Regarding this Message
  • SENDER
  • Reply to SENDER Regarding this Message
    Time: 03:42:19 PM PST US
    Subject: Re: sundry questions
    From: Tim Andres <tim2542@sbcglobal.net>
    I think you'll be unhappy with a panel mounted Ipad, they will heat soak from the sun in a hurry and simply turn off. I use one however and love it, but I stow it out of the sun (and thieves) view when parked and just set it on my legs in flight. FWIW Tim > On Jul 9, 2014, at 2:16 PM, "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com> wrote: > > > At 10:07 AM 7/9/2014, you wrote: >> BTW, I've read your book. Very nice for a first time builder. > > Thank you. > >> Hope you don't mind a few questions. > > Not at all . . . but I would like for you to join the AeroElectric-List > for any future conversation. It's always a good thing when we share > these conversations with the community. > >> I plan on going with fuses for the majority of the circuit protection as you recommended. When I went to your web site to find fuse blocks and bus bars, I had a hard time navigating through the site. Do you have an online product catalog, or is that something I have to buy? When I clicked on the link the first time, an order form came up. I tried again at a later time and finally made it to the fuse block section, but the pdf descriptions that came up was hardly readable. > > I don't sell any hardware at present. I have in the > past but right now, B&C at http://bandc.biz has the > vast majority of my legacy products and merchandise. > I'm talking with them about upgrades to products and > getting some new items. Time is my tight commodity. > I'm contracting for Beech/Cessna/Hawker and there > aren't very many gray-beards around to remember how > and why some things were done . . . waayyyyy back when. > > >> I'm a vfr only pilot and am considering surface mounting an I-pad mini on the dash as a backup. It would run Foreflight and communicate with a Stratus Two. I've heard the pads tend to overheat and was thinking about installing a cooling fan behind it in the panel. Do you have any thoughts on this? What type fan should I use to avoid RFI, etc? How many cfm? Do you have a simpler idea, or am I needlessly worrying about the overheating problem? > > Folks on the List can better sources of information > on this than I. I'm surprised about 'heat issues' . . . > these things draw about 3-5 watts in operation, the > vast majority of which gets turned into heat. Unless > there are items with localized heat-dissipation issues > (doubtful for a hand-held device), I would not expect > there to be any problems for operational heating. > > However, these things are not designed to RESIDE on a > panel of an airplane parked out in the sun. I sure > wouldn't leave one in a parked airplane. > >> The other thing I was looking for was 12v usb port I could hardwire near my panel (not a cigarette lighter adapter) so the pad would be charged while in flight. Blue Sea makes usb ports for marine application that looks good, but didn't know if you had any. > > That's a popular topic on the List. A number of > builders have tried various commercial off the self > 12v/USB power adapters with varying degrees of > success. Depending on how handy you are with > a soldering iron, you could craft an airplane- > friendly, 14V to 5VUSB adapter starting with > a reasonably robust assembly as a core . . . > something like these . . . > > http://tinyurl.com/ovowqbu > > http://tinyurl.com/px42t7f > > > . . . mounted in a metal enclosure and fitted with > sure-to-work filters and over-load protection. > > Alternatively, something like this . . . > > http://tinyurl.com/pbvmbb3 > > . . . might be just fine in terms of performance > and noise . . . you'd just have to try it. > >> I also read your article on using shielded cable for the LIghtspeed electronic ignition instead of the coax. The use of epoxy to seal the wiring seemed like a pain and was wondering if using a tighter fitting, larger shielded wire with shrink wrapping would be ok. Are the reasons for not using larger cable expense, flexibility, and weight? > > Klaus had a cow when I wrote that article . . . seems > that coax cable was necessary if the system were going > to generate 2" long sparks between coil towers. Going > to shielded wire dropped the output to 1.5" sparks. > Still about 100x more than needed to make the engine run > but I'll have to concede a 'drop in performance'. > > The original problem with coax was his recommendation > for using RG-58 . . . with insulation that drips off > the wire when you try to solder it. He has since revised > his recommendation to RG-400 coax . . . modern, hi-temp > insulation. > > > Bob . . . > > > >


    Message 6


  • INDEX
  • Back to Main INDEX
  • PREVIOUS
  • Skip to PREVIOUS Message
  • NEXT
  • Skip to NEXT Message
  • LIST
  • Reply to LIST Regarding this Message
  • SENDER
  • Reply to SENDER Regarding this Message
    Time: 04:39:37 PM PST US
    Subject: Re: sundry questions
    From: John Tipton <jmtipton@btopenworld.com>
    This is my 4year old grandson, flying P2, with my IPad suction mounted on my C172 John Sent from my iPad ----x--O--x---- > On 9 Jul 2014, at 11:40 pm, Tim Andres <tim2542@sbcglobal.net> wrote: > > > > I think you'll be unhappy with a panel mounted Ipad, they will heat soak f rom the sun in a hurry and simply turn off. I use one however and love it, b ut I stow it out of the sun (and thieves) view when parked and just set it o n my legs in flight. > FWIW > Tim > >> On Jul 9, 2014, at 2:16 PM, "Robert L. Nuckolls, III" <nuckolls.bob@aeroe lectric.com> wrote: >> lls.bob@aeroelectric.com> >> >> At 10:07 AM 7/9/2014, you wrote: >>> BTW, I've read your book. Very nice for a first time builder. >> >> Thank you. >> >>> Hope you don't mind a few questions. >> >> Not at all . . . but I would like for you to join the AeroElectric-List >> for any future conversation. It's always a good thing when we share >> these conversations with the community. >> >>> I plan on going with fuses for the majority of the circuit protection as you recommended. When I went to your web site to find fuse blocks and bus b ars, I had a hard time navigating through the site. Do you have an online p roduct catalog, or is that something I have to buy? When I clicked on the l ink the first time, an order form came up. I tried again at a later time an d finally made it to the fuse block section, but the pdf descriptions that c ame up was hardly readable. >> >> I don't sell any hardware at present. I have in the >> past but right now, B&C at http://bandc.biz has the >> vast majority of my legacy products and merchandise. >> I'm talking with them about upgrades to products and >> getting some new items. Time is my tight commodity. >> I'm contracting for Beech/Cessna/Hawker and there >> aren't very many gray-beards around to remember how >> and why some things were done . . . waayyyyy back when. >> >> >>> I'm a vfr only pilot and am considering surface mounting an I-pad mini o n the dash as a backup. It would run Foreflight and communicate with a Stra tus Two. I've heard the pads tend to overheat and was thinking about instal ling a cooling fan behind it in the panel. Do you have any thoughts on this ? What type fan should I use to avoid RFI, etc? How many cfm? Do you have a simpler idea, or am I needlessly worrying about the overheating problem? >> >> Folks on the List can better sources of information >> on this than I. I'm surprised about 'heat issues' . . . >> these things draw about 3-5 watts in operation, the >> vast majority of which gets turned into heat. Unless >> there are items with localized heat-dissipation issues >> (doubtful for a hand-held device), I would not expect >> there to be any problems for operational heating. >> >> However, these things are not designed to RESIDE on a >> panel of an airplane parked out in the sun. I sure >> wouldn't leave one in a parked airplane. >> >>> The other thing I was looking for was 12v usb port I could hardwire near my panel (not a cigarette lighter adapter) so the pad would be charged whil e in flight. Blue Sea makes usb ports for marine application that looks goo d, but didn't know if you had any. >> >> That's a popular topic on the List. A number of >> builders have tried various commercial off the self >> 12v/USB power adapters with varying degrees of >> success. Depending on how handy you are with >> a soldering iron, you could craft an airplane- >> friendly, 14V to 5VUSB adapter starting with >> a reasonably robust assembly as a core . . . >> something like these . . . >> >> http://tinyurl.com/ovowqbu >> >> http://tinyurl.com/px42t7f >> >> >> . . . mounted in a metal enclosure and fitted with >> sure-to-work filters and over-load protection. >> >> Alternatively, something like this . . . >> >> http://tinyurl.com/pbvmbb3 >> >> . . . might be just fine in terms of performance >> and noise . . . you'd just have to try it. >> >>> I also read your article on using shielded cable for the LIghtspeed elec tronic ignition instead of the coax. The use of epoxy to seal the wiring se emed like a pain and was wondering if using a tighter fitting, larger shield ed wire with shrink wrapping would be ok. Are the reasons for not using lar ger cable expense, flexibility, and weight? >> >> Klaus had a cow when I wrote that article . . . seems >> that coax cable was necessary if the system were going >> to generate 2" long sparks between coil towers. Going >> to shielded wire dropped the output to 1.5" sparks. >> Still about 100x more than needed to make the engine run >> but I'll have to concede a 'drop in performance'. >> >> The original problem with coax was his recommendation >> for using RG-58 . . . with insulation that drips off >> the wire when you try to solder it. He has since revised >> his recommendation to RG-400 coax . . . modern, hi-temp >> insulation. >> >> >> Bob . . . > > ========================== ========= ========================== ========= ========================== ========= ========================== ========= > > > <pre><b><font size=2 color="#000000" face="courier new,courier"> </b></font></pre></body></html>


    Message 7


  • INDEX
  • Back to Main INDEX
  • PREVIOUS
  • Skip to PREVIOUS Message
  • NEXT
  • Skip to NEXT Message
  • LIST
  • Reply to LIST Regarding this Message
  • SENDER
  • Reply to SENDER Regarding this Message
    Time: 05:00:35 PM PST US
    From: BobsV35B@aol.com
    Subject: Re: sundry questions
    Test! Old Bob In a message dated 7/9/2014 4:19:18 P.M. Central Daylight Time, nuckolls.bob@aeroelectric.com writes: --> AeroElectric-List message posted by: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com> At 10:07 AM 7/9/2014, you wrote: >BTW, I've read your book. Very nice for a first time builder. Thank you. >Hope you don't mind a few questions. Not at all . . . but I would like for you to join the AeroElectric-List for any future conversation. It's always a good thing when we share these conversations with the community. >I plan on going with fuses for the majority of the circuit >protection as you recommended. When I went to your web site to find >fuse blocks and bus bars, I had a hard time navigating through the >site. Do you have an online product catalog, or is that something I >have to buy? When I clicked on the link the first time, an order >form came up. I tried again at a later time and finally made it to >the fuse block section, but the pdf descriptions that came up was >hardly readable. I don't sell any hardware at present. I have in the past but right now, B&C at http://bandc.biz has the vast majority of my legacy products and merchandise. I'm talking with them about upgrades to products and getting some new items. Time is my tight commodity. I'm contracting for Beech/Cessna/Hawker and there aren't very many gray-beards around to remember how and why some things were done . . . waayyyyy back when. >I'm a vfr only pilot and am considering surface mounting an I-pad >mini on the dash as a backup. It would run Foreflight and >communicate with a Stratus Two. I've heard the pads tend to >overheat and was thinking about installing a cooling fan behind it >in the panel. Do you have any thoughts on this? What type fan >should I use to avoid RFI, etc? How many cfm? Do you have a >simpler idea, or am I needlessly worrying about the overheating problem? Folks on the List can better sources of information on this than I. I'm surprised about 'heat issues' . . . these things draw about 3-5 watts in operation, the vast majority of which gets turned into heat. Unless there are items with localized heat-dissipation issues (doubtful for a hand-held device), I would not expect there to be any problems for operational heating. However, these things are not designed to RESIDE on a panel of an airplane parked out in the sun. I sure wouldn't leave one in a parked airplane. >The other thing I was looking for was 12v usb port I could hardwire >near my panel (not a cigarette lighter adapter) so the pad would be >charged while in flight. Blue Sea makes usb ports for marine >application that looks good, but didn't know if you had any. That's a popular topic on the List. A number of builders have tried various commercial off the self 12v/USB power adapters with varying degrees of success. Depending on how handy you are with a soldering iron, you could craft an airplane- friendly, 14V to 5VUSB adapter starting with a reasonably robust assembly as a core . . . something like these . . . http://tinyurl.com/ovowqbu http://tinyurl.com/px42t7f . . . mounted in a metal enclosure and fitted with sure-to-work filters and over-load protection. Alternatively, something like this . . . http://tinyurl.com/pbvmbb3 . . . might be just fine in terms of performance and noise . . . you'd just have to try it. >I also read your article on using shielded cable for the LIghtspeed >electronic ignition instead of the coax. The use of epoxy to seal >the wiring seemed like a pain and was wondering if using a tighter >fitting, larger shielded wire with shrink wrapping would be ok. Are >the reasons for not using larger cable expense, flexibility, and weight? Klaus had a cow when I wrote that article . . . seems that coax cable was necessary if the system were going to generate 2" long sparks between coil towers. Going to shielded wire dropped the output to 1.5" sparks. Still about 100x more than needed to make the engine run but I'll have to concede a 'drop in performance'. The original problem with coax was his recommendation for using RG-58 . . . with insulation that drips off the wire when you try to solder it. He has since revised his recommendation to RG-400 coax . . . modern, hi-temp insulation. Bob . . .


    Message 8


  • INDEX
  • Back to Main INDEX
  • PREVIOUS
  • Skip to PREVIOUS Message
  • NEXT
  • Skip to NEXT Message
  • LIST
  • Reply to LIST Regarding this Message
  • SENDER
  • Reply to SENDER Regarding this Message
    Time: 07:12:47 PM PST US
    From: David Saylor <saylor.dave@gmail.com>
    Subject: Re: iPod shocks
    Thanks Bob. Glad to know it's not just me! do not archive On Wed, Jul 9, 2014 at 1:13 PM, Robert L. Nuckolls, III < nuckolls.bob@aeroelectric.com> wrote: > nuckolls.bob@aeroelectric.com> > > Got out to the lab this morning with Dave's 'tingly' > wall-wart. Connected the two ac mains tabs together > as one terminal. Tied all wires in a USB cable together > and stuck the connector into the wall-wart's output > jack. > > The test-set I had access to didn't offer the 1,500 VAC/ > 2,200 VDC test levels commonly used for line powered > equipment. > > Made three 'hi-pot' measurements at 250, 500 and > 1000 VDC each. All the average value of measured > leakage resistance was 55,000 ohms. > > One would have liked to test this power supply at > about 2200 VDC and look for a leakage current > less that 0.5 mA translating to a resistance on > the order of 4.4 Megohms. > > The relative stability of leakage resistance over > the 250-1000 VDC test range suggests that barring > arc-over failure, the leakage current at 2200 volts > would be on the order of 2200/55,000 = 0.04A or > abut 80x the test target. > > I disassembled the test article to capture these > images. > > http://tinyurl.com/oxbyprq > > http://tinyurl.com/oahyg4a > > http://tinyurl.com/pfbsxbo > > http://tinyurl.com/pjnwyom > > I'll do some additional testing to see if I can > repeat Dave's measurements at the wall socket. But > in any case, this particular design would probably > not pass any organization's safety testing > reqluirements. > > > 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
  • 7-Day List Browse
  •   http://www.matronics.com/browse/aeroelectric-list
  • Browse AeroElectric-List 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.

    -- Please support this service by making your Contribution today! --