---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Sat 08/13/11: 7 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 11:00 AM - Re: Re: One Noisy Mag (Robert L. Nuckolls, III) 2. 02:57 PM - Z-13/8 inline fuse () 3. 07:35 PM - Fw: current outstanding questions (Keith Ward) 4. 07:45 PM - Warning - New Bose Line Power Cables Only 3' Long! (Matt Dralle) 5. 07:46 PM - Re: One Noisy Mag (user9253) 6. 09:14 PM - Re: Fw: current outstanding questions (Robert L. Nuckolls, III) 7. 09:16 PM - Re: Z-13/8 inline fuse (Robert L. Nuckolls, III) ________________________________ Message 1 _____________________________________ Time: 11:00:28 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Re: One Noisy Mag At 12:04 AM 8/13/2011, you wrote: > >Hi Bob, > >That was it - I swapped the mag filters and now I have a noisy right >hand mag and a quiet left hand one. Don't know why I didn't think >of that, though they're not all that old. Must have had a dud right >out of the box because it's always been like that and I installed >those filters about five years ago, but... that happens >sometimes. Thanks for the help - sure appreciate it. Pleased to be of service. You were getting close by yourself. The detective work was on point. Bob . . . ________________________________ Message 2 _____________________________________ Time: 02:57:34 PM PST US From: Subject: AeroElectric-List: Z-13/8 inline fuse Bob, I noticed that the latest revision of Z-13/8 calls out a 30 amp inline fuse between the battery contactor and the SD-8. In a previous post I found an explanation for the change, but am wondering what type of device would be used. A fuse holder with a couple of loose leads for an automotive type fuse or a firewall mounted single pole fuse holder with a small, round fuse. Any recommendations or supplier P/N appreciated. Tom Barter Avid Magnum - wiring ________________________________ Message 3 _____________________________________ Time: 07:35:00 PM PST US Subject: AeroElectric-List: Fwd: current outstanding questions From: Keith Ward > Here are a few questions from my buddy who is building an RV-10 and will be using Z13/8 for his all electric panel. He is trying to use zero or as few circuit breakers on the panel as possible. He will be using fuse blocks for the main and endurance buses, so most of the usual CBs will not be needed. Questions: > 1. "ALT FLD" wire protection z13/8: can that be a fuse or does it need to be a circuit breaker on the panel? > 2. Is it feasible to think someone could react fast enough on run away trim scenario to pull the circuit breaker before it ran its full course? If not - use fuse instead of CB? > 3. In z13/8, Can both shunts be hooked up to one ammeter? Would the shunt attached to the SD8 alternator indicate a load even if the aux alt switch was off? Suggestions for best way to proceed with only one ammeter? > 4.If your goal was to minimize as many warning lights, switches, and CBs on the panel, what would your short list be of these items to remain? Using Dynon Skyview that will be booted up prior to start-up that will have plenty of warnings to display. Thanks for the input. Keith ________________________________ Message 4 _____________________________________ Time: 07:45:04 PM PST US From: Matt Dralle Subject: AeroElectric-List: Warning - New Bose Line Power Cables Only 3' Long! Just a heads up to those installing or planning on installing Bose X or A20 Active NR headsets using the inline power jacks. Specifically these units: http://www.bose.com/controller?url=/shop_online/headphones/aviation_headsets/accessories/headset_installkit_acc.jsp They now come with only 3 feet of cable! Three years ago they came with 6 feet of cable and I thought at the time that 6 feet seemed a little short. Now 3 feet? What idiot penny pincher in Bose marketing decided "three feet should be plenty". Here's quote from the Bose web page above: "Three-foot wiring harness with six pin female connector allows for *placement in locations throughout aircraft*." WTF? On what planet will a 3-foot hardness reach "locations throughout the aircraft". That's just plain stupid. If these were third rate, el-cheapo headsets, I'd write it off to penny pinching, but for a >$1000 product that you then have to spend an additional $32 for an installation cable, cheaping out on the cable length is just simply unacceptable. I have the jacks mounted in the center of the RV-8, and the cables don't even reach to the righthand control console. What does Bose expect people to do; splice the wire? That's ridiculous! What would somebody installing in the back seats of a 4 or 6 place airplane do? Of course I wrote a scathing email to Bose Support just now. I'm sure they will write back with "for most of our customers, three feet is sufficient". Given this direction within Bose, I'd definitely consider the new Sennheiser S1 if I had to do it over again. Additionally, the Sennheiser's Bluetooth supports the A2DP, AVRCP STEREO profiles. The Bose A20's Bluetooth does NOT support stereo. It must have been the same marketing moron that dictated 3' cables that decided not to include stereo Bluetooth profiles. Unbelievable. Matt - Matt "Red Dawg" Dralle RV-8 #82880 N998RV "Ruby Vixen" http://www.mattsrv8.com - Matt's Complete RV-8 Construction Log http://www.mattsrv8.com/Mishap - Landing Mishap Rebuild Log http://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV YouTube Channel Status: 170+ Hours TTSN - Rebuilding Fuselage After Landing Mishap... ________________________________ Message 5 _____________________________________ Time: 07:46:41 PM PST US Subject: AeroElectric-List: Re: One Noisy Mag From: "user9253" > Checking the mag switch (AAF A-7 type) I found that the shields were also grounded at the switch. "Aha!" says I. "exactly what Bob said never to do." So I reached in with a pair of side cutters and cut the connections to the shields Some magneto switches have a terminal labeled GND to which the shields are attached. This GND terminal is not an actual airframe ground. The shields need to be connected to this terminal in order for the switch to short out the P leads. The mag switch operation should be verified to be sure there is not an always hot mag. Joe -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=349351#349351 ________________________________ Message 6 _____________________________________ Time: 09:14:51 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Fwd: current outstanding questions At 09:31 PM 8/13/2011, you wrote: > > > > Here are a few questions from my buddy who is building an RV-10 > and will be using Z13/8 for his all electric panel. He is trying > to use zero or as few circuit breakers on the panel as > possible. He will be using fuse blocks for the main and endurance > buses, so most of the usual CBs will not be needed. > >Questions: > > 1. "ALT FLD" wire protection z13/8: can that be a fuse or does it > need to be a circuit breaker on the panel? If he is using crowbar ov protection, a CB is called for . . . > > 2. Is it feasible to think someone could react fast enough on run > away trim scenario to pull the circuit breaker before it ran its > full course? If not - use fuse instead of CB? No > > > 3. In z13/8, Can both shunts be hooked up to one ammeter? Would > the shunt attached to the SD8 alternator indicate a load even if > the aux alt switch was off? Suggestions for best way to proceed > with only one ammeter? Put it on the SD-8 only. That's the one most useful for shedding loads in flight. You're never going to overload the main alternator. > > 4.If your goal was to minimize as many warning lights, switches, > and CBs on the panel, what would your short list be of these items > to remain? Using Dynon Skyview that will be booted up prior to > start-up that will have plenty of warnings to display. "Plenty" ought to be enough. I've been flying in TC aircraft for over 60 years that have zero 'warnings'. They have gages that give you the big picture and for nearly a century, it has been quite sufficient to let the pilot do the pilot-thing and be aware of the big picture. Engines and other systems have only become more reliable over the years while digital instrumentation has offered us ways to raise flags, flash lights, sound alarms and otherwise lull us to sleep in a cockpit that makes less demands. If you've got an electro-whizzy with warning features not included on a 1980 A-36 Bonanza, I suspect that will be "plenty". Bob . . . //// (o o) ===========o00o=(_)=o00o======== < Go ahead, make my day . . . > < show me where I'm wrong. > ================================ ________________________________ Message 7 _____________________________________ Time: 09:16:31 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Z-13/8 inline fuse At 04:53 PM 8/13/2011, you wrote: > >Bob, > >I noticed that the latest revision of Z-13/8 calls out a 30 amp >inline fuse between the battery contactor and the SD-8. In a >previous post I found an explanation for the change, but am >wondering what type of device would be used. A fuse holder with a >couple of loose leads for an automotive type fuse or a firewall >mounted single pole fuse holder with a small, round fuse. Any >recommendations or supplier P/N appreciated. NO GLASS CARTRIDGE FUSES. Use the MAX30 and companion holder available from any parts store. http://aeroelectric.com/Pictures/Fuses/Fuses/maxi.gif http://aeroelectric.com/Pictures/Fuses/Fuse_Holders/MaxiFuse_Holder.jpg Bob . . . //// (o o) ===========o00o=(_)=o00o======== < Go ahead, make my day . . . > < show me where I'm wrong. > ================================ ------------------------------------------------------------------------------------- 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.