---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Mon 11/22/10: 8 ---------------------------------------------------------- Today's Message Index: ---------------------- 0. 12:11 AM - Contributions Down By 17%... (Matt Dralle) 1. 05:35 AM - Re: Z13/8 Rev Q comments (Jeff Page) 2. 10:06 AM - Re: Re: Z13/8 Rev Q comments (B Tomm) 3. 12:41 PM - OV protection for Alt energized contactor (jonlaury) 4. 01:04 PM - Source for fuselink sleeve? (jonlaury) 5. 01:27 PM - Re: Source for fuselink sleeve? (Robert L. Nuckolls, III) 6. 01:27 PM - Re: Source for fuselink sleeve? (Robert Borger) 7. 01:46 PM - Re: Re: Z13/8 Rev Q comments (Robert L. Nuckolls, III) ________________________________ Message 0 _____________________________________ Time: 12:11:52 AM PST US From: Matt Dralle Subject: AeroElectric-List: Contributions Down By 17%... Dear Listers, As of today, Contributions to the Matronics List Fund Raiser are lagging behind last year at this time by roughly 17%. I have a Fund Raiser each year simply to cover my operating costs for the Lists. I *do not* accept any advertising income to support the Lists and rely solely on the Contributions of members to keep the expenses paid. I run all of my own servers and they are housed here locally, and the Internet connection is a commercial-grade, T1 connection with public address space. I also maintain a full backup system that does nightly backups of all List-related data so that in the event of a server crash or worse, all of the Lists and the many years of List archive data could be restored onto a new server in a matter of hours. All of this costs a fair amount of money, not to mention a significant amount of my personal time. I have a Fund Raiser each year to cover these costs and I ask that members that feel they receive a benefit from my investments make a modest Contribution each year to support the continued operation and upgrade of these services. If you enjoy the Lists, please make a Contribution today. I also offer some incentive gifts for larger Contribution levels. At the Contribution Web Wite, you can use a credit card, Paypal, or personal check to show your support for the continuation of these services: http://www.matronics.com/contribution Or, drop a personal check in the mail to: Matt Dralle / Matronics 581 Jeannie Way Livermore CA 94550 USA Thank you for your support! Matt Dralle Matronics Email List Administrator ________________________________ Message 1 _____________________________________ Time: 05:35:44 AM PST US From: Jeff Page Subject: AeroElectric-List: Re: Z13/8 Rev Q comments > Jeff, > > If I recall correctly and Bob may confirm, the SD8 aux alt actually puts out > up to 10mp at the rpm we fly. Further, in a main alternator out scenario, > this is to be matched to the continuous draw of your minimum equipment list. > The surge current for transmitting etc can come from the battery. > Therefore, I would think that the SD8 will be sufficient as I'm doing > similar as you. > > Bevan > RV7A wiring, not flying yet. I typically cruise at 2200 rpm. For a Lycoming the pad ratio is 1.3:1. at 2860 rpm, the SD-8 outputs approx 6.2A, which is just a little shy of what I need. Some items, such as the instrument panel lights can be turned down or off. The Skyview probably drawsa less current if it is dimmed as well. The SD-8 will produce more power if I cruise at a higher rpm. So my Plan B has me doing a little adjustment to keep the low voltage warning light off. I would like to include a transponder on my endurance bus, but that would require the SD-20. More cost and weight for a very unlikely situation. Jeff Page Dream Aircraft Tundra #10 ________________________________ Message 2 _____________________________________ Time: 10:06:05 AM PST US From: "B Tomm" Subject: RE: AeroElectric-List: Re: Z13/8 Rev Q comments OK, I stand corrected on the output of the SD-8. Good info here. I check my E-buss to see if it's less than 6 amp continuous. Bevan RV7A wiring -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Jeff Page Sent: Monday, November 22, 2010 5:28 AM Subject: AeroElectric-List: Re: Z13/8 Rev Q comments > Jeff, > > If I recall correctly and Bob may confirm, the SD8 aux alt actually > puts out up to 10mp at the rpm we fly. Further, in a main alternator > out scenario, this is to be matched to the continuous draw of your minimum equipment list. > The surge current for transmitting etc can come from the battery. > Therefore, I would think that the SD8 will be sufficient as I'm doing > similar as you. > > Bevan > RV7A wiring, not flying yet. I typically cruise at 2200 rpm. For a Lycoming the pad ratio is 1.3:1. at 2860 rpm, the SD-8 outputs approx 6.2A, which is just a little shy of what I need. Some items, such as the instrument panel lights can be turned down or off. The Skyview probably drawsa less current if it is dimmed as well. The SD-8 will produce more power if I cruise at a higher rpm. So my Plan B has me doing a little adjustment to keep the low voltage warning light off. I would like to include a transponder on my endurance bus, but that would require the SD-20. More cost and weight for a very unlikely situation. Jeff Page Dream Aircraft Tundra #10 ________________________________ Message 3 _____________________________________ Time: 12:41:34 PM PST US Subject: AeroElectric-List: OV protection for Alt energized contactor From: "jonlaury" My Stby alternator energizes its contactor, per the attached drawing. How do I provide OV protection to the circuit with an OVM 14? Thanks, John Read this topic online here: http://forums.matronics.com/viewtopic.php?p=320538#320538 Attachments: http://forums.matronics.com//files/stby_alt_ov_protection_study_417.pdf ________________________________ Message 4 _____________________________________ Time: 01:04:46 PM PST US Subject: AeroElectric-List: Source for fuselink sleeve? From: "jonlaury" Does Aerolectric Connection still sell the kits? Didn't see it in the Products section J Read this topic online here: http://forums.matronics.com/viewtopic.php?p=320541#320541 ________________________________ Message 5 _____________________________________ Time: 01:27:21 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Source for fuselink sleeve? At 03:00 PM 11/22/2010, you wrote: > >Does Aerolectric Connection still sell the kits? >Didn't see it in the Products section I think B&C sells it. It's a Bently-Harris silicon impregnated fiberglas sleeving. Were are you intending to use it? Bob . . . ________________________________ Message 6 _____________________________________ Time: 01:27:21 PM PST US From: Robert Borger Subject: Re: AeroElectric-List: Source for fuselink sleeve? J, Go to B & C Specialty Products ( http://www.bandc.biz/ ). They have Fusible Link Kits under "Electrical Products" "Circuit Protective Devices" Check six, Bob Borger http://www.europaowners.org/N914XL Europa XS, Short Wing, Intercooled Rotax 914 rlborger@mac.com Cel: 817-992-1117 On Nov 22, 2010, at 3:00 PM, jonlaury wrote: > > Does Aerolectric Connection still sell the kits? > Didn't see it in the Products section > > J ________________________________ Message 7 _____________________________________ Time: 01:46:57 PM PST US From: "Robert L. Nuckolls, III" Subject: RE: AeroElectric-List: Re: Z13/8 Rev Q comments At 11:10 AM 11/21/2010, you wrote: > >Jeff, > >If I recall correctly and Bob may confirm, the SD8 aux alt actually puts out >up to 10mp at the rpm we fly. Correct . . . sort of . . . the NORMAL manner in which alternators are rated calls for supporting the bus a the design set point. Say 14.2 - 14.6 volts. At the same time, a battery doesn't deliver significant energy into the system until the bus sags to 12.5 or so volts. The "normal" rating for the SD-8 is 8A. However, the max load you can support with an SD-8 without taxing the battery closer to 10A because the bus voltage can be allowed to sag. This is why I don't show low-voltage warning on the E-bus. Even with an SD-8 powering it (as in Z-13/8). A satisfactory operating design point voltage is probably below the trip point for a l3v warning light driver. >Further, in a main alternator out scenario, >this is to be matched to the continuous draw of your minimum equipment list. >The surge current for transmitting etc can come from the battery. >Therefore, I would think that the SD8 will be sufficient as I'm doing >similar as you. If we were comfortable with the idea of taxing a battery for a minimum endurance during alternator out operations, the act of adding an SD-8 on top of the battery does not convert the battery's stored energy into a sacred commodity. If you needed to support a 13A endurance bus under some conditions, why not? The points to be pondered are minute details for how "plan-b" or perhaps even a "plan-c" are implemented. What preventative maintenance tests to the battery will be religiously conducted to insure support for your "worst case" but planned-for scenario. Building an OBAM aircraft is a mixed bag. There's a LOT of planning supported by a lot of understanding that is NOT covered in a holy-watered POH for your project. You're on your own to make sure you've got "the plan" and understanding that meets your design goals. Well, not entirely on your own . . . there IS the AeroElectric List. This discussion highlights the importance of both load analysis and failure mode effects that drive configuration of both hardware and your "plan-b". Bob . . . ------------------------------------------------------------------------------------- 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.