---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Thu 01/13/11: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 03:52 AM - Re: Request review of Electrical Load Analysis - using Z13/8 ar (plevyakh) 2. 06:30 AM - Re: Re: Request review of Electrical Load Analysis - using Z13/8 ar (Robert L. Nuckolls, III) 3. 06:33 AM - Re: Open squelch (Robert L. Nuckolls, III) ________________________________ Message 1 _____________________________________ Time: 03:52:20 AM PST US Subject: AeroElectric-List: Re: Request review of Electrical Load Analysis - using Z13/8 ar From: "plevyakh" Jeff, Thanks I'll add those items. I'm going to go without the cooling fan initially and see how the avionics fare. I might have to add later. For those planning IFR w/ similar equipment....it looks like the LC-60 amp alternator is a must due to the high current consumption of the pitot heat, navigation, strobe, and landing lights. For anyone who has not yet purchased equipment you'll want to buy LED style, and maybe the Gretz Aero pitot heat system to keep the amps down. I'm going to switch to the B&C LC-60 amp alternator and plan for a max continuous electrical load of 80-85% or 48 to 51 amps. Howard -------- Howard Plevyak GlaStar North Bend, Ohio hplevyak@mac.com Read this topic online here: http://forums.matronics.com/viewtopic.php?p=326839#326839 ________________________________ Message 2 _____________________________________ Time: 06:30:42 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Re: Request review of Electrical Load Analysis - using Z13/8 ar At 06:48 AM 1/13/2011, you wrote: > >Jeff, >Thanks I'll add those items. I'm going to go without the cooling >fan initially and see how the avionics fare. I might have to add later. > >For those planning IFR w/ similar equipment....it looks like the >LC-60 amp alternator is a must due to the high current consumption >of the pitot heat, navigation, strobe, and landing lights. > >For anyone who has not yet purchased equipment you'll want to buy >LED style, and maybe the Gretz Aero pitot heat system to keep the amps down. > >I'm going to switch to the B&C LC-60 amp alternator and plan for a >max continuous electrical load of 80-85% or 48 to 51 amps. Really that high? Do you run all those things all the time for any flight condition? Here's an exemplar load-analysis form I've used for many years. http://www.aeroelectric.com/PPS/Load_Analysis/Blank_Form.pdf It set's up a series of flight conditions that comport with suggestions offered by FAR23.1351(a)(1)(i) that says:i) "For normal, utility, and acrobatic category airplanes, by an electrical load analysis or by electrical measurements that account for the electrical loads applied to the electrical system in probable combinations and for probable durations" The operative words are "combinations" and "duration". Not all things are turned on at any time. The last detail load analysis I did on a small airplane some years ago showed a max CONTINUOUS demand of 27 amps for the worst case flight condition (IFR, pitot heat ON). This left 10A plus for battery maintenance with only a 40A alternator. The rule of thumb for alternator sizing is to reserve 25% of total capacity for battery charging so if you're planning a 60A alternator, you want to establish operating conditions that do not demand more than 45A continuous. Bob . . . >Howard > >-------- >Howard Plevyak >GlaStar >North Bend, Ohio >hplevyak@mac.com > > >Read this topic online here: > >http://forums.matronics.com/viewtopic.php?p=326839#326839 > > >----- >No virus found in this message. >Checked by AVG - www.avg.com Bob . . . ________________________________ Message 3 _____________________________________ Time: 06:33:42 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Open squelch Thanks Bob; When the antenna is disconnected the radio goes silent. I spoke with both Icom and GRT today. At this point I'm going to leave it as is until I still have a problem after the panel is installed in the aircraft. If so GRT indicated they can install some filters on the video display that may help. Interesting. I didn't mention it in my earlier post . . . but the LCD color display panels have cropped up a number of times before as potentially serious radiation antagonists. Sounds like GRT might not fare well in the DO160 qualifications tests. 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.