---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Wed 02/27/19: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:34 AM - Re: History of the E-Bus (user9253) 2. 07:37 AM - Re: History of the E-Bus (Av8rrob) 3. 08:22 PM - Static Wicks - Bonding of Flight Controls (jsajpf) ________________________________ Message 1 _____________________________________ Time: 07:34:39 AM PST US Subject: AeroElectric-List: Re: History of the E-Bus From: "user9253" Each builder has their own ideas on how to wire their airplane. It would be nice to offer more Z figures to give builders more electrical diagrams to choose from.. Modern EFISs have a built-in low voltage warning. So the new Z figure will not need low voltage warning. Many EFISs come with their own internal backup battery that will last for an hour or more. Some builders might not want or need an E-Bus. Below is a circuit without a separate E-Bus. But it does have a relay in parallel with the battery contactor. That relay provides a parallel current path similar to an E-Bus relay. For normal operations, the master switch will be in up position. If the pilot wishes to conserve electrical energy for any reason or if the battery contactor fails, the pilot can move the master switch to the center position (endurance mode). The power hungry battery contactor will be disabled and the relay will turn on. Symptoms of battery contactor failure may be abnormal fluctuations of system voltage. The center position of the master switch is also useful for ground operations such as electrical troubleshooting or just sitting in the aircraft learning how to use the avionics. The relay uses a fraction of the power that a contactor does. The starter is disabled with the master switch in the center position, making it safer while working on the plane. -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=487834#487834 Attachments: http://forums.matronics.com//files/contactor_parallel_relay_176.jpg ________________________________ Message 2 _____________________________________ Time: 07:37:44 AM PST US Subject: AeroElectric-List: Re: History of the E-Bus From: "Av8rrob" Bob, I appreciate the back story. As a newbie builder I also appreciate the knowledge and dedication that you have given the aviation community for so long. My challenge has been to find a balance between too simple and too robust/complicated in my layout. As I look at information put you by suppliers (garmin etc.) other builders and wise pros like yourself its tough to sort though all the opinions. Switched avionics bus ..... or not. E- bus ... or not. IBBS backup battery.... or not. Brownout..... In my previous posts youve challenged me to justify my modifications from your tried and true and I guess the ideas Ive had come from wanting the simplicity of the z-12 with the other opinions thrown into the mix. I will follow this thread closely. Thanks again Read this topic online here: http://forums.matronics.com/viewtopic.php?p=487835#487835 ________________________________ Message 3 _____________________________________ Time: 08:22:47 PM PST US Subject: AeroElectric-List: Static Wicks - Bonding of Flight Controls From: "jsajpf" Bob (et al), Looking for insight into legacy Type Certificated airplane design rationale for installing static wicks and bonding jumpers between fixed structure and movable flight control surfaces. Several E/AB designs do not specify installation of static wicks nor bonding jumpers for flight control surfaces. The particular design I plan to build is among this group and reports from those with years flying the design are (albeit a limited number of respondents): no issues with P-static and the like. I cannot attest to the types of operations, nor how frequent the exposure to conditions conducive to P-Static interference, for the respondents to my query. Looking for input from TC house folks (Bob) regarding rules of thumb, design standards, etc. regarding incorporation of static wicks and bonding?? My experience with the subject matter is as a maintainer, troubleshooting reports of symptoms of P-Static while in visible moisture, required inspections after a lightning strike, routine verification (inspections) of electrode-to-surface bonding values, etc. Correction of broken or degraded control surface bonding cured the majority of reported faults. Some degraded antenna bonds are among the mix as well. Design standards applicable to mitigating P-Static trouble are not clear to me and my understanding of design criteria/recommendations is admittedly academic (at best). What say ye, the sage?! John Read this topic online here: http://forums.matronics.com/viewtopic.php?p=487843#487843 ------------------------------------------------------------------------------------- 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.