---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Sat 08/27/16: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 01:38 PM - Re: Connectors for Wing Roots (Robert L. Nuckolls, III) 2. 01:52 PM - wig wag (JOHN TIPTON) 3. 02:18 PM - Re: Connectors for Wing Roots (Charlie England) 4. 02:44 PM - Re: Re: EFIS power switch - part 2 (Robert L. Nuckolls, III) ________________________________ Message 1 _____________________________________ Time: 01:38:36 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Connectors for Wing Roots At 11:30 AM 8/26/2016, you wrote: >Not familiar with "handshake connectors." Please amplify and provide >mfg. and pt. no. >Cheers! Stu. Emacs! Here is one modern incarnation of a T&B terminal we used to use on the Cessna twin engine line. As you can see, they're not cheap. They're certainly secure in tension . . . but no more so than a knife splice. I've got some 40 year old wrist-locks around here somewhere . . . shows you how often I've been excited about using them. Bob . . . ________________________________ Message 2 _____________________________________ Time: 01:52:32 PM PST US Subject: AeroElectric-List: wig wag From: "JOHN TIPTON" Hi Guys/Bob I like this 'wig wag' circuit http://www.aeroelectric.com/articles/WigWag/WigWag.pdf using Page 3 (single source, single switch) with 2-10 switch (I have a few) the 'full wave diode rectifer' is basically the requirement for two diodes (I think you will agree), so as I have spare capacity on my Power Deuce Schottky Advanced E-Bus Diode (only one diode is being used for the edurance bus) by Perihelion Designs, its complete with power sink, this is eminetly suitable. best regards John Read this topic online here: http://forums.matronics.com/viewtopic.php?p=459956#459956 ________________________________ Message 3 _____________________________________ Time: 02:18:35 PM PST US From: Charlie England Subject: Re: AeroElectric-List: Connectors for Wing Roots On Sat, Aug 27, 2016 at 3:35 PM, Robert L. Nuckolls, III < nuckolls.bob@aeroelectric.com> wrote: > At 11:30 AM 8/26/2016, you wrote: > > Not familiar with "handshake connectors." Please amplify and provide mfg. > and pt. no. > Cheers! Stu. > > > Here is one modern incarnation of a T&B terminal > we used to use on the Cessna twin engine line. > As you can see, they're not cheap. They're certainly > secure in tension . . . but no more so than a > knife splice. > > I've got some 40 year old wrist-locks around here > somewhere . . . shows you how often I've been > excited about using them. > > > Bob . . . > In addition to being pricey, anything like that (knife splice, etc) still has the downside of requiring an operation for each wire whenever they must be disconnected, and they require some other ID for each wire pair to ID them for re-connection, with a risk of error still there. With a multi-pin, keyed connector, one operation and no risk of connection error. ________________________________ Message 4 _____________________________________ Time: 02:44:57 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Re: EFIS power switch - part 2 At 10:21 PM 8/26/2016, you wrote: > >The total demand of the electrical system exceeds the output of the >secondary alternator. By driving the EFIS and Dynon devices to the >TCW battery I have more options in the event of of a primary >alternator failure. Normally, the secondary alternator is a get-home with only the most useful things running for en-route navigation thus saving what is supposed to be a prudently maintained battery in reserve for descent and approach to landing. This is what the all-flight-conditions load analysis is about . . . ENERGY MANAGEMENT in less than optimum conditions. The artfully crafted airplane can be cruised for hours on a fraction of the power needed for a 'full up' compliment of electro-whizzies. >Additionally by disconnected the EFIS from the buss during start up, >I eleminate any potential for brownout as well as giving me the >option to drive the EFIS with the backup battery for preflight data >entry without reducing the starting power of the main battery. Avionics haven't been a significant detriment to adequate cranking energy for decades. Getting the engine started takes a lot of POWER but rather modest ENERGY. Modern SLVA (and later LiPO) cells offer very low internal impedance which is really what gets your engine started. Remember the Start Stick? Recall my fussing about Lead Acid Equivalency in LiPo batteries. The purveyors of LiPo batteries were capitalizing on the engine cranking ability of an itty-bitty lithium battery when in fact, the ENERGY cotained in the 'equivalent' battery was a small fraction of that for the SVLA. It only takes a few percent off the top to get an engine started . . . running modern avionics during clearance delivery and pre-flight is no longer an operational concern. 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.