---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Sat 11/21/15: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 12:48 PM - Re: Rotax ignition wiring (jrevens) 2. 01:10 PM - Re: Rotax ignition wiring (jrevens) ________________________________ Message 1 _____________________________________ Time: 12:48:43 PM PST US Subject: AeroElectric-List: Re: Rotax ignition wiring From: "jrevens" nuckolls.bob(at)aeroelect wrote: > At 09:12 PM 11/19/2015, you wrote: > > > > > This may be a dumb question, but would using a shielded twisted pair for the combined ignition control wiring to both modules be OK, or are 2 individual shielded single conductor wires preferred for some reason? I am basically using Bob's Z-16 diagram... I am very grateful to have that, Bob! > > My pleasure. What you propose would be fine. > Do you already have some twisted pair 20 or > 18AWG? > > > Bob . . . Yes I do, Bob. Not sure if I'll use it, but I was just trying to educate myself a little further in analyzing if there were any issues with using 2 wires enclosed in a common shield for this application. I like your suggestion to ground at the engine only and use the shield for the conductor back to the module. Thanks to all for the replies. -------- John Evens Thorp T-18 N71JE (built & flying) Kitfox SS7 N27JE (building) Read this topic online here: http://forums.matronics.com/viewtopic.php?p=449854#449854 ________________________________ Message 2 _____________________________________ Time: 01:10:25 PM PST US Subject: AeroElectric-List: Re: Rotax ignition wiring From: "jrevens" rickofudall wrote: > All, The ignition modules and the pickups together cost almost $4,000 to replace. A few feet of shielded wire costs what, $1.49? I'd wire it exactly as Rotax says rather than experiment. > > Rick Girard Yep, those modules and pickups are really stupidly expensive and over-priced. I'm amazed that someone hasn't come up with a viable aftermarket replacement that could probably be sold for a fraction of the price and still make a nice profit. I'm really not trying to "experiment" with this, Rick, but sometimes there is a little more elegant or simple way to do something that accomplishes the same result... maybe resulting in less weight, fewer connections, better design from a "noise" standpoint, etc. I'm not really convinced that doing everything "exactly as Rotax says..." is always the best that I can do. I've seen a couple of possible errors in their manuals for the 912 series engines. For instance, yesterday while studying the latest 912 Installation manual, I noticed the following on p.4 of section 80-00-00 regarding the starter system - "NOTICE - The starter relay must be isolated from the aircraft ground". What? I'm not sure if I'm misunderstanding that or what. -------- John Evens Thorp T-18 N71JE (built & flying) Kitfox SS7 N27JE (building) Read this topic online here: http://forums.matronics.com/viewtopic.php?p=449856#449856 ------------------------------------------------------------------------------------- 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.