---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Thu 01/15/09: 8 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 12:18 AM - Re: Using a key Ignition switch with a Rotax 912 (Etienne Phillips) 2. 07:13 AM - Re: Using a key Ignition switch with a Rotax 912 (rampil) 3. 07:44 AM - Re: Using a key Ignition switch with a Rotax 912 (Robert L. Nuckolls, III) 4. 02:00 PM - Z-11 + aux battery and diode bridge rectifier problem (Paul Eckenroth) 5. 02:01 PM - Re: Using a key Ignition switch with a Rotax 912 (rampil) 6. 04:52 PM - Bussman fuse blocks (Tom Barter) 7. 05:55 PM - Re: Bussman fuse blocks (Allen Fulmer) 8. 06:28 PM - Re: Bussman fuse blocks () ________________________________ Message 1 _____________________________________ Time: 12:18:55 AM PST US Subject: Re: AeroElectric-List: Using a key Ignition switch with a Rotax 912 From: Etienne Phillips On 15 Jan 2009, at 3:08 AM, Floyd wrote: > I do not have a key in the ignition system but I doubt anyone > could figure out how to start the plane... Of course there's nothing stopping someone capable of flying the aircraft (generally a pilot) from turning on the mags and hand- swinging the prop ;-) ________________________________ Message 2 _____________________________________ Time: 07:13:24 AM PST US Subject: AeroElectric-List: Re: Using a key Ignition switch with a Rotax 912 From: "rampil" I actually use a keyed ignition switch on my 912ULS. It is a Bendix switch and has been working as planned for 5 years. My a/c is not the only rotax powered, keyed system I know of. Any trip to SnF or Osh will illustrate this is a popular system config. If I were you Les, I would ignore the comments of anyone who does not have direct, hands on experience with the 912/914 -------- Ira N224XS Read this topic online here: http://forums.matronics.com/viewtopic.php?p=224899#224899 ________________________________ Message 3 _____________________________________ Time: 07:44:47 AM PST US From: "Robert L. Nuckolls, III" Subject: AeroElectric-List: Re: Using a key Ignition switch with a Rotax 912 At 09:11 AM 1/15/2009, you wrote: > >I actually use a keyed ignition switch on my 912ULS. >It is a Bendix switch and has been working as planned for 5 years. >My a/c is not the only rotax powered, keyed system I know of. >Any trip to SnF or Osh will illustrate this is a popular system config. > >If I were you Les, I would ignore the comments of anyone who does >not have direct, hands on experience with the 912/914 The Rotax ignition systems use the same switching conventions as a legacy magneto. I.e. closing the switch kills the ignition system. The standard off-l-r-both-start switches work fine. Keyed switches were the brain-child of the airplane- in-every-garage thinking of those who were building aviation manufacturing empires with grandiose plans. The idea was that the more your airplane looked/felt like an automobile, the better. The earliest single engine aircraft were not fitted with key-locked mag switches. Certainly airplanes with two or more engines were and are not fitted with multiple key-locked switches. I once brought a rental aircraft home after loosing the key by wiggling the ring terminals on the back of the mag switch until they broke off. I propped the engine and came home. It took ten minutes with a crimp tool to fix the wiring after I got back. If someone is capable of flying your airplane and has evil intent upon depriving you of possession, the key-lock switch is a trivial impediment to their purpose. This is the better theft deterrent . . . http://aeroelectric.com/Pictures/Misc/AC_Theft_Protection.jpg This particular airplane's doors can be opened in seconds with a lock-pick and turning wrench. The super- hard chain and lock are entirely another matter . . . Bob . . . ----------------------------------------) ( . . . a long habit of not thinking ) ( a thing wrong, gives it a superficial ) ( appearance of being right . . . ) ( ) ( -Thomas Paine 1776- ) ---------------------------------------- ________________________________ Message 4 _____________________________________ Time: 02:00:43 PM PST US Subject: AeroElectric-List: Z-11 + aux battery and diode bridge rectifier problem From: Paul Eckenroth I have an RV9A wired as per Z-11 with a 7A aux battery as an EFIS keep alive during start. This has worked well for 200 hours. Lately the EFIS has been graying out during engine starts which implies that the aux battery is being tapped for other than the electronics during engine start. The batteries are isolated using two diode bridge rectifiers from B&C. The E bus which feed the EFIS and other electronics gets it's power from the main bus through one of the bridge rectifiers. Both of the batteries power the main bus through individual contactors. The E bus is also powered through the second bridge rectifier by both batteries direct and then controlled by the E bus switch. Normal start is main battery contactor on, aux battery contactor off, and E bus switch on. This should isolate the aux battery to the E bus until the aux battery contactor is turned on after engine start. I have checked both diode assemblies to see that they are allowing current to flow in the correct direction and they are not allowing backfeed. Everything checks out properly using the voltmeter. However it seems to me that the problem must lie with the diodes since they are the only link between the batteries with the aux battery contactor off. Can a diode function correctly under low load conditions and then temporarily break down under start conditions. Any ideas as to how I should proceed. Please keep in mind that I have read the AeroElectric Connection and wired my RV9 but have no formal electrical knowledge beyond this. Paul Eckenroth ________________________________ Message 5 _____________________________________ Time: 02:01:23 PM PST US Subject: AeroElectric-List: Re: Using a key Ignition switch with a Rotax 912 From: "rampil" I can't think of a single aircraft you could park in my old neighborhood of 168th & Broadway, NYC and have it be there in the morning, hardened chain and all. Maybe that why the TSA has locked up all the airports? I'm just kidding guys 8) -------- Ira N224XS Read this topic online here: http://forums.matronics.com/viewtopic.php?p=224981#224981 ________________________________ Message 6 _____________________________________ Time: 04:52:28 PM PST US From: "Tom Barter" Subject: AeroElectric-List: Bussman fuse blocks I am looking for information on Bussman fuse blocks that have the terminals on the back side of the block. I would like to mount the fuseblock under the panel on a hinged plate that would swing down for access to the fuses. I know that there have been references to this, but an archive search does not seem to find it. I found the 15300 series on the Bussman site, but am not sure of the terminals used. Any help appreciated. Regards, Tom Barter Kesley, IA Avid Magnum - wiring ________________________________ Message 7 _____________________________________ Time: 05:55:45 PM PST US From: "Allen Fulmer" Subject: RE: AeroElectric-List: Bussman fuse blocks I saved an email with this link: http://home.earthlink.net/~dswartzendruber/ I used standard bussman fuse blocks however. Allen Fulmer RV7 Wiring Eggenfellner E6Ti hanging N808AF reserved Alexander City, AL -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com]On Behalf Of Tom Barter Sent: Thursday, January 15, 2009 6:48 PM To: aeroelectric-list@matronics.com Subject: AeroElectric-List: Bussman fuse blocks I am looking for information on Bussman fuse blocks that have the terminals on the back side of the block. I would like to mount the fuseblock under the panel on a hinged plate that would swing down for access to the fuses. I know that there have been references to this, but an archive search does not seem to find it. I found the 15300 series on the Bussman site, but am not sure of the terminals used. Any help appreciated. Regards, Tom Barter Kesley, IA Avid Magnum - wiring ________________________________ Message 8 _____________________________________ Time: 06:28:23 PM PST US From: Subject: Re: AeroElectric-List: Bussman fuse blocks Try this link http://www.mihdirect.biz/ I purchased one and actually like it better than the one sold at B&C. Jerry ---- Tom Barter wrote: > I am looking for information on Bussman fuse blocks that have the terminals > on the back side of the block. I would like to mount the fuseblock under > the panel on a hinged plate that would swing down for access to the fuses. > I know that there have been references to this, but an archive search does > not seem to find it. I found the 15300 series on the Bussman site, but am > not sure of the terminals used. Any help appreciated. > > > > Regards, > > > > Tom Barter > > Kesley, IA > > Avid Magnum - wiring > ------------------------------------------------------------------------------------- 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.