X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from QMTA02.westchester.pa.mail.comcast.net ([76.96.62.24] verified) by logan.com (CommuniGate Pro SMTP 5.2.14) with ESMTP id 3674565 for flyrotary@lancaironline.net; Sun, 07 Jun 2009 12:15:38 -0400 Received-SPF: none receiver=logan.com; client-ip=76.96.62.24; envelope-from=gregw@onestopdesign.biz Received: from OMTA12.westchester.pa.mail.comcast.net ([76.96.62.44]) by QMTA02.westchester.pa.mail.comcast.net with comcast id 145n1c0030xGWP8524F6yW; Sun, 07 Jun 2009 16:15:06 +0000 Received: from osd1 ([24.6.40.29]) by OMTA12.westchester.pa.mail.comcast.net with comcast id 14F41c00J0dkeQQ3Y4F5jc; Sun, 07 Jun 2009 16:15:06 +0000 Message-ID: <02DB592C374C476A9EF4D918688FC723@yosemite.onestopdesign.biz> From: "Greg Ward" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Battery Isolation diodes Date: Sun, 7 Jun 2009 09:24:47 -0700 MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=response Content-Transfer-Encoding: 7bit X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5512 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 Thanks Bill, looks like exactly what I'm looking for. Greg ----- Original Message ----- From: "Bill Schertz" To: "Rotary motors in aircraft" Sent: Sunday, June 07, 2009 4:05 AM Subject: [FlyRotary] Re: Battery Isolation diodes >I have that system. The Blue Mountain EFIS is powered by a small 12V >auxiliary battery, that is fed by a Shottky diode from the main bus. When >starting to fly, I turn on the EFIS switch, and only the BM unit comes up, >after it has booted, I can observe engine gauges, program the GPS portion, >etc. Then I turn on main buss and start the engine. The aux battery on the >BM unit is isolated from the main bus by the diode, therefore does not sag >in voltage with the starter. > > This also lets me shut off the BM unit last, after engine shutdown and > main power off. > Bill Schertz > KIS Cruiser #4045 > N343BS > Phase I testing > ----- Original Message ----- > From: "Greg Ward" > To: "Rotary motors in aircraft" > Sent: Saturday, June 06, 2009 9:37 PM > Subject: [FlyRotary] Re: Battery Isolation diodes > > >> Hey John; >> Agree with you on the CB's, but it sounds like a pain in the a... to have >> to do that every time you are sitting on the ground programming a GPS. I >> think they were talking more of a separate switch, from the battery, that >> you could hit, and power the GPS/EFIS only, and then when that was done, >> going onto engine start. I am no electrical genius, which is why I was >> asking if a switch over like this is possible. In other words, hit a >> switch, program, and then go to engine start without losing power to the >> GPS/EFIS, forcing a reboot. >> Greg >> >> ----- Original Message ----- >> From: "John" >> To: "Rotary motors in aircraft" >> Sent: Saturday, June 06, 2009 6:10 PM >> Subject: [FlyRotary] Re: Battery Isolation diodes >> >> >>> Greg, I have fuses going to the EC-2 and the coils, if I had CB's I >>> could switch off the CB's, now I need to pull the fuses, another good >>> reason to use CB's. JohnD >>> ----- Original Message ----- >>> From: "Greg Ward" >>> To: "Rotary motors in aircraft" >>> Sent: Saturday, June 06, 2009 8:32 PM >>> Subject: [FlyRotary] Re: Battery Isolation diodes >>> >>> >>>> Got them Ed, and thanks. One quick question. I went to an AOPA safety >>>> seminar, and they recommended a separate ground switch for the GPS, and >>>> related equipment, so that they could be programmed without the engine >>>> running, as that has been known to take some time, and your head is >>>> down with a prop running. Has anybody done this? Any diagrams? >>>> Greg Ward >>> >>>>> >>>>> eanderson@carolina.rr.com >>>>> >>>>> http://www.andersonee.com >>>>> >>>>> http://www.dmack.net/mazda/index.html >>>>> >>>>> http://www.flyrotary.com/ >>>>> >>>>> http://members.cox.net/rogersda/rotary/configs.htm#N494BW >>>>> >>>>> http://www.rotaryaviation.com/Rotorhead%20Truth.htm >>>>> >>>>> >>>>> -----Original Message----- >>>>> From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] >>>>> On >>>>> Behalf Of Ernest Christley >>>>> Sent: Saturday, June 06, 2009 4:23 PM >>>>> To: Rotary motors in aircraft >>>>> Subject: [FlyRotary] Re: Battery Isolation diodes >>>>> >>>>> Ed Anderson wrote: >>>>>> >>>>>> Thanks, Tracy >>>>>> >>>>>> I was unaware (never thought about it) of the association - perhaps >>>>>> not having an isolation diode is one reason I never had any "Noise >>>>>> Problem" with the EC2 {:>) >>>>>> >>>>>> Thanks for the information >>>>>> >>>>>> Ed >>>>>> >>>>> When wiring up the diode, it should be fairly simple to drop in a >>>>> large >>>>> value mylar capacitor to conduct the noise. My experience with >>>>> electrolytics is that they can be poorly made and leak. The mylars >>>>> would >>>>> be more robust in the environmental extremes of an airplane. >>>>> >>>>> In any case, I thought the diode was just for a backup. The switch >>>>> would >>>>> stay in the same position it has always occupied, so noise would be >>>>> absorbed by the battery as it always has. The EC2 would have to be on >>>>> the battery side of the switch, which would make it even more noise >>>>> isolated when hidden behind the diode. >>>>> >>>>> -- >>>>> >>>>> http://www.ernest.isa-geek.org >>>>> >>>>> >>>>> >>>>> -- >>>>> Homepage: http://www.flyrotary.com/ >>>>> Archive and UnSub: >>>>> http://mail.lancaironline.net:81/lists/flyrotary/List.html >>>>> >>>>> __________ Information from ESET NOD32 Antivirus, version of virus >>>>> signature >>>>> database 3267 (20080714) __________ >>>>> >>>>> The message was checked by ESET NOD32 Antivirus. >>>>> >>>>> http://www.eset.com >>>>> >>>>> >>>>> >>>>> __________ Information from ESET NOD32 Antivirus, version of virus >>>>> signature >>>>> database 3267 (20080714) __________ >>>>> >>>>> The message was checked by ESET NOD32 Antivirus. >>>>> >>>>> http://www.eset.com >>>>> >>>>> >>>>> >>>>> -- >>>>> Homepage: http://www.flyrotary.com/ >>>>> Archive and UnSub: >>>>> http://mail.lancaironline.net:81/lists/flyrotary/List.html >>>>> >>>> >>>> >>>> -- >>>> Homepage: http://www.flyrotary.com/ >>>> Archive and UnSub: >>>> http://mail.lancaironline.net:81/lists/flyrotary/List.html >>>> >>> >>> >>> >>> -- >>> Homepage: http://www.flyrotary.com/ >>> Archive and UnSub: >>> http://mail.lancaironline.net:81/lists/flyrotary/List.html >>> >> >> >> -- >> Homepage: http://www.flyrotary.com/ >> Archive and UnSub: >> http://mail.lancaironline.net:81/lists/flyrotary/List.html >> > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: > http://mail.lancaironline.net:81/lists/flyrotary/List.html >