---------------------------------------------------------- RotaxEngines-List Digest Archive --- Total Messages Posted Thu 09/18/08: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:49 AM - Rotax 914 (Fergus Kyle) 2. 08:13 AM - Re: Rotax 914 (m.grass@comcast.net) 3. 08:13 AM - Re: Rotax 914 (m.grass@comcast.net) 4. 08:20 PM - Re: Rotax 914 (Noel Loveys) ________________________________ Message 1 _____________________________________ Time: 06:49:44 AM PST US From: "Fergus Kyle" Subject: RotaxEngines-List: Rotax 914 Hello, I am assembling the wiring for the above model engine. In the process, I wired the dynamo module wires to coaxial cable which runs to the ignition switches, ensuring that the coax braid is exclusively connected to nearby engine ground at one end and one pole of each switch at the other. The switches are enclosed in small alum boxes attached to the panel for interference protection. I see, by Installation manual, page 75 [electric circuit, d/1996 05 10] that there seems to be an electrical ground connection to the switch frame and thus to the metal panel on which it is fixed. If that is so, then the engine frame ground extends into the cockpit via the coax. Is this the intent? What is its purpose, please? Ferg Europa A064 ________________________________ Message 2 _____________________________________ Time: 08:13:48 AM PST US Subject: Re: RotaxEngines-List: Rotax 914 From: m.grass@comcast.net Q Sent via BlackBerry by AT&T -----Original Message----- From: "Fergus Kyle" Subject: RotaxEngines-List: Rotax 914 This is a multi-part message in MIME format. ________________________________ Message 3 _____________________________________ Time: 08:13:48 AM PST US Subject: Re: RotaxEngines-List: Rotax 914 From: m.grass@comcast.net Q Sent via BlackBerry by AT&T -----Original Message----- From: "Fergus Kyle" Subject: RotaxEngines-List: Rotax 914 This is a multi-part message in MIME format. ________________________________ Message 4 _____________________________________ Time: 08:20:44 PM PST US From: "Noel Loveys" Subject: RE: RotaxEngines-List: Rotax 914 The ground on the shield is to prevent the P-leads from interfering with your radios.. When you ground these leads they turn off (short out) the magnetos so the engine will stop. Generally, coax should only be grounded at one end, the engine end. Grounding at both ends makes the coax an inductive emitter if the signal is high enough on the centre lead. When you wire your plane be sure to have a good hefty braid (ground) going from the engine block across the lord mounts to a sturdy place on the frame. Doing that will lower the possibility of radio interference and it will ensure you get lots of cranking amps to your starter too. Noel _____________________________________________ From: owner-rotaxengines-list-server@matronics.com [mailto:owner-rotaxengines-list-server@matronics.com] On Behalf Of Fergus Kyle Sent: Thursday, September 18, 2008 11:18 AM Subject: RotaxEngines-List: Rotax 914 Hello, I am assembling the wiring for the above model engine. In the process, I wired the dynamo module wires to coaxial cable which runs to the ignition switches, ensuring that the coax braid is exclusively connected to nearby engine ground at one end and one pole of each switch at the other. The switches are enclosed in small alum boxes attached to the panel for interference protection. I see, by Installation manual, page 75 [electric circuit, d/1996 05 10] that there seems to be an electrical ground connection to the switch frame and thus to the metal panel on which it is fixed. If that is so, then the engine frame ground extends into the cockpit via the coax. Is this the intent? What is its purpose, please? Ferg Europa A064 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rotaxengines-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RotaxEngines-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/rotaxengines-list Browse Digests http://www.matronics.com/digest/rotaxengines-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.