---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Wed 08/10/11: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:19 AM - Re: Antenna ground plane and nearby cables (jonlaury) 2. 08:58 AM - Re: Re: Antenna ground plane and nearby cables (Robert L. Nuckolls, III) 3. 08:58 AM - Around the world again... (Jay Hyde) ________________________________ Message 1 _____________________________________ Time: 07:19:29 AM PST US Subject: AeroElectric-List: Re: Antenna ground plane and nearby cables From: "jonlaury" > No, antennas on the outside of the airplane > sitting on an existing groundplane (skin > or tubular structure) or manufactured ground- > plane are not influenced by adjacent wires > on the other side of the groundplane. > Bob, I mounted my xpdr antenna on a 6" diameter ground plane inside my composite plane. The tail strobe wire is about 12" away from the antenna. Would you expect problems with this installation? John Read this topic online here: http://forums.matronics.com/viewtopic.php?p=349111#349111 ________________________________ Message 2 _____________________________________ Time: 08:58:35 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Re: Antenna ground plane and nearby cables At 09:15 AM 8/10/2011, you wrote: > > > > No, antennas on the outside of the airplane > > sitting on an existing groundplane (skin > > or tubular structure) or manufactured ground- > > plane are not influenced by adjacent wires > > on the other side of the groundplane. > > > > >Bob, I mounted my xpdr antenna on a 6" diameter ground plane inside >my composite plane. The tail strobe wire is about 12" away from the >antenna. Would you expect problems with this installation? Define "problems". There will be an effect. Whether strong enough to offer an observable difference is subject to much conjecture and discussion . . . but never quantified without competent analysis, accurately measured experimentation or both. Not trying to be obtuse . . . even the 'big guys' know few facts that go to your question. Education is expensive and they're so busy fighting big fires that mundane details like performance anomalies in antenna installations take a distant back seat. This has been known to come back and 'bite' in expensive and embarrassing ways later. I could expound on those war-stories for hours. Bottom line is, try it. Make notes of situations where ATC says your transponder is intermittent or unreadable under conditions where you believe it shouldn't be a problem. Competent observation and connection of the dots will out-weigh any amount of supposition/conjecture on the forums. But if it worries you, then do the legacy hang- it-out-the-bottom installation that has proven to be the best-we-know-how-to-do. Bob . . . ________________________________ Message 3 _____________________________________ Time: 08:58:36 AM PST US From: "Jay Hyde" Subject: AeroElectric-List: Around the world again... Hi there everyone, A couple of years ago two mates of mine, Mike Blyth and James Pitman, flew from Johannesburg, South Africa to Oshkosh, Wisconsin, USA and then continued around the world back to SA. The flight was an epic and record breaking one involving two 20+hour crossings over the Atlantic and Pacific oceans. The flew around the world in 38 days in a light sport aircraft that they had designed and built, with the aim of selling these as kits or ready built aircraft. Their aircraft, called the Sling, is a 2 seater, low wing, all aluminium aircraft powered by a Rotax 912 engine which proved its reliability over the long over water stretches of the trip. Two years later, and some 27 orders of aircraft later, they and their new business partner, Jean Dasonville, are now doing it all again; this time from west to east - but now in their new 4 seater, christened, 'Silver Bullit', which is an enlarged version of their 2 seater, comfortably seating 4. They took off from Johannesburg on Sunday, headed for Reunion Island, with their 450 litre tanks (the whole leading edges of each wing are fuel tanks) filled to the brim. They landed safely and will take off on their next leg tomorrow morning at 4am SA time- this time a 24 hour flight to Colombo, Sri Lanka. They had planned to stop off at the Maldives on the way but there is only 80 octane MOGAS available in the Maldives so they are going to try and push through. Its an epic adventure; iced wings on the first night and now extended legs because of fuel availability.. If you would like to read more about it have a look at http://www.airplanefactory.co.za/sling4atw_news.asp Jay Hyde South Africa ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ HH Enterprises * Aircraft assembly, repair, wiring and avionics * Flight instruction * General and Electrical Engineering services (NHD Elec Eng, BTech Elec Eng, GDE ELec Eng) * Great dinner parties and conversation * General adventuring, climbing, kayaking and living Blog: www.rawhyde.wordpress.com Cel: 083 300 8675 Email: jay@horriblehyde.com ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ------------------------------------------------------------------------------------- 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.