---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Fri 04/30/10: 8 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 03:14 AM - Re: Electrical diagram (user9253) 2. 05:38 AM - Re: stopping engine (Eric M. Jones) 3. 07:43 AM - Mag switches in z13/8 (Jared Yates) 4. 08:01 AM - Re: Mag switches in z13/8 (Robert L. Nuckolls, III) 5. 08:28 AM - Re: Re: Electrical diagram (Robert L. Nuckolls, III) 6. 09:43 AM - Re: IVO Prop Current Limiter/Electronic Circuit Breaker (Glaeser, Dennis) 7. 05:31 PM - Re: Re: IVO Prop Current Limiter/Electronic Circuit Breaker (RGent1224@aol.com) 8. 06:45 PM - Re: Electrical diagram (marchudson) ________________________________ Message 1 _____________________________________ Time: 03:14:17 AM PST US Subject: AeroElectric-List: Re: Electrical diagram From: "user9253" Marc, Your schematic is better than most type-certificated aircraft. Having the start switch on the E-Bus is unusual. There is no advantage to having it there because the engine will not start without the master contactor being energized. It is possible to leave the baggage light on and run the battery down. I would consider putting the transponder and trim on the E-Bus. You could always shut the transponder off if desired. The trim will not use power unless the trim switch is pressed. I assume that an EFIS will announce a low voltage condition. What about over-voltage protection? Is that built into the alternator? Joe -------- Joe Gores Read this topic online here: http://forums.matronics.com/viewtopic.php?p=296274#296274 ________________________________ Message 2 _____________________________________ Time: 05:38:52 AM PST US Subject: AeroElectric-List: Re: stopping engine From: "Eric M. Jones" In learning to fly in a C150/C172, the explanation was: The fuel was gravity fed with a left-right- both selector (was there an OFF?), the spark was magneto. In the event that the prop was turned by hand, the magneto could start the engine if its P-lead to ground lead was defective. So throttle at idle, mixture pulled lean until engine quit, switch off. Your mileage may vary. -------- Eric M. Jones www.PerihelionDesign.com 113 Brentwood Drive Southbridge, MA 01550 (508) 764-2072 emjones@charter.net Read this topic online here: http://forums.matronics.com/viewtopic.php?p=296286#296286 ________________________________ Message 3 _____________________________________ Time: 07:43:46 AM PST US From: Jared Yates Subject: AeroElectric-List: Mag switches in z13/8 I'm planning to use z13/8 in an airplane with mags at first, and perhaps electronic ignition later. Would it be ok to copy the mag switch arangement in z11, which uses the 2-5 switches? ________________________________ Message 4 _____________________________________ Time: 08:01:36 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Mag switches in z13/8 At 09:05 AM 4/30/2010, you wrote: > >I'm planning to use z13/8 in an airplane with mags at first, and >perhaps electronic ignition later. Would it be ok to copy the mag >switch arangement in z11, which uses the 2-5 switches? Sure. The 2-5 switches can be wired to accommodate about any combination of mags and/or electronic ignition switches. Bob . . . ________________________________ Message 5 _____________________________________ Time: 08:28:50 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Re: Electrical diagram At 05:11 AM 4/30/2010, you wrote: > >Marc, > Your schematic is better than most type-certificated aircraft. > Having the start switch on the E-Bus is unusual. There is no > advantage to having it there because the engine will not start > without the master contactor being energized. > It is possible to leave the baggage light on and run the battery down. > I would consider putting the transponder and trim on the > E-Bus. You could always shut the transponder off if desired. The > trim will not use power unless the trim switch is pressed. > I assume that an EFIS will announce a low voltage > condition. What about over-voltage protection? Is that built into > the alternator? I'll second Joe's observations/questions. Additionally, I'm curious as to a perceived advantage for not combining alternator and battery master control in a single switch? Are you planning on using the pullable breaker as the means by which power is removed from the bus in flight? Bob . . . ________________________________ Message 6 _____________________________________ Time: 09:43:26 AM PST US From: "Glaeser, Dennis" Subject: AeroElectric-List: Re: IVO Prop Current Limiter/Electronic Circuit Breaker Bob, The reed switch circuit is already in place and operational, so my initial goal has been achieved! I already have the parts for the first design - only half assembled at the moment (having to work for a living gets in the way of the 'important stuff' :-) The latest design literally dummy-proofs the operation of the IVO, and will undoubtedly increase the MTBF of the motor and gearbox by limiting the motor electrically rather than mechanically jamming the gears! I can follow your description on how it works, but my knowledge falls short of being able to analyze and comment. When you declare the updated circuit complete, I'll build it (already have most of the components :-) and let you know how it works! It was me who was doing the 'praying' for a solution! You did the 'perspiration' part - per Thomas Edison. Thanks, Dennis ----------------------------------- From: Robert L. Nuckolls, III It took a bit more 'praying' than I anticipated and I'm only 99.6% sure that my confidence in having met design goals have been met. But I'll invite other 'electron herders' on the List to review the following and see if I've stubbed my toe anywhere: See: http://aeroelectric.com/Pictures/Schematics/IVO-Prop_Pitch_Controller.pdf ------------------------------------ ________________________________ Message 7 _____________________________________ Time: 05:31:58 PM PST US From: RGent1224@aol.com Subject: Re: AeroElectric-List: Re: IVO Prop Current Limiter/Electronic Circuit Breaker Dennis Do you have a circuit diagram/photos of your installation that you can share?? Thanks Dick In a message dated 4/30/2010 11:44:48 A.M. Central Daylight Time, dennis.glaeser@hp.com writes: --> AeroElectric-List message posted by: "Glaeser, Dennis" Bob, The reed switch circuit is already in place and operational, so my initial goal has been achieved! I already have the parts for the first design - only half assembled at the moment (having to work for a living gets in the way of the 'important stuff' :-) The latest design literally dummy-proofs the operation of the IVO, and will undoubtedly increase the MTBF of the motor and gearbox by limiting the motor electrically rather than mechanically jamming the gears! I can follow your description on how it works, but my knowledge falls short of being able to analyze and comment. When you declare the updated circuit complete, I'll build it (already have most of the components :-) and let you know how it works! It was me who was doing the 'praying' for a solution! You did the 'perspiration' part - per Thomas Edison. Thanks, Dennis ----------------------------------- From: Robert L. Nuckolls, III It took a bit more 'praying' than I anticipated and I'm only 99.6% sure that my confidence in having met design goals have been met. But I'll invite other 'electron herders' on the List to review the following and see if I've stubbed my toe anywhere: See: http://aeroelectric.com/Pictures/Schematics/IVO-Prop_Pitch_Controller.pdf ------------------------------------ ________________________________ Message 8 _____________________________________ Time: 06:45:47 PM PST US Subject: AeroElectric-List: Re: Electrical diagram From: "marchudson" Bob and Joe, I want to thank you for reviewing my diagram. I appreciate it. Have the start button on the e-bus was an oversight. I will move it to the main bus. Thanks for catching that. Leaving the baggage light on was taken into consideration and I'm willing to take the risk on this one. I'm sure after if bites me a couple of times, I'll reconsider. Joe, good call on putting the transponder and trim on e-bus. I will probably do this as the transponder consumes little power. The EFIS does annunciate a low voltage condition and crowbar over voltage protection is built into the Plane Power alternator. Bob, to be honest, I went with the single battery switch for simplicity and cost. Much cheaper to purchase the two position locking Honeywell toggle than the three position. Also, my thoughts were that I'm probably not going to be shutting off the alternator that often. If I really need to then yes, I'm going to be using the breaker as a switch. I called Plane Power twice and made sure that this alternator will run fine without the battery online, just in case the battery inadvertently got shut off with the engine running. Again guys, I really appreciate you having a look. Marc Read this topic online here: http://forums.matronics.com/viewtopic.php?p=296343#296343 ------------------------------------------------------------------------------------- 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.