---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Sun 06/14/09: 7 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:25 AM - IFR Certification () 2. 06:44 AM - Re: Z12 questions (Bob Barrow) 3. 07:06 AM - Re: Z12 questions (rckol) 4. 12:53 PM - Re: Z12 questions (Ken) 5. 03:24 PM - Is there a way to have part 14V and part 28V? () 6. 05:05 PM - Re: Is there a way to have part 14V and part 28V? (David LLoyd) 7. 08:53 PM - Re: Is there a way to have part 14V and part 28V? (Greg Young) ________________________________ Message 1 _____________________________________ Time: 04:25:50 AM PST US From: Subject: AeroElectric-List: IFR Certification 6/14/2009 Hello Ira, Thanks for your input. You wrote: 1) "For VFR into B, C airspace the BMA should be fine according to my reading of the regs." Note that the wording of 14 CFR 91.217 makes no distinction between the requirement for either a TSO'd altitude encoder (91.217 (c)) or a tested altitude encoder (91.217 (b)) for mode C operations (automatic pressure altitude reporting equipment) under IFR or VFR. Further, no class of airspace is excluded from the requirements of 91.217 by the wording therein. Can you cite some regulation that says otherwise? 2) "I treated my airframe to a brand new Sandia SAE5-35 TSO'd blind encoder." A valid solution. When people have attempted to get the assistance of EAA to change / clarify FAA Headquarter's position on this subject that is what EAA has recommended -- just install a TSO'd altitude encoder. 'OC' Says: "The best investment we can make is the effort to gather and understand knowledge." =============================================== Time: 10:35:39 AM PST US Subject: Avionics-List: Re: IFR Certification From: "rampil" Actually I didn't condemn the boss, I simply referenced the boss as the key to the problem. I am familiar with the issues you raised which is why when finally got IFR certification for myself, I treated my airframe to a brand new Sandia SAE5-35 TSO'd blind encoder. For VFR into B, C airspace the BMA should be fine according to my reading of the regs. -------- Ira N224XS ________________________________ Message 2 _____________________________________ Time: 06:44:17 AM PST US From: Bob Barrow Subject: RE: AeroElectric-List: Z12 questions As others have suggested=2C it does seem like Z14 is my best option as I ha ve the L40 and SD20 already installed and I have 2 off LR3 regulators. Too much trouble and expense to go sending back things to B&C for exchange now from Australia. So I have purchased a second Odyssey AGM battery=2C in this case a PC310 wh ich is 7AH and weighs very little (2.7kg). Do you foresee of any problems with running the SD20 with the PC310 on the secondary bus. Cheers Bob From: nuckolls.bob@aeroelectric.com Subject: RE: AeroElectric-List: Z12 questions At 07:22 AM 6/10/2009=2C you wrote: From: nuckolls.bob@aeroelectric.com Subject: Re: AeroElectric-List: Z12 questions > Yes=2C you can run both alternators together but >getting them to share proportionately is difficult >without special paralleling regulators. Bob=2C what exactly happens with architecture Z12 (with specifically one L R3 and one SB-1 regulator) if you keep turning on major loads (pitot=2C lan ding lights=2C etc) until the primary L40 alternator can no longer cope and the voltage sags. Will the SD20 come on and run concurrently. I presume it will... until some of the loads are shed..but from your comment above it may not be a happy event over time. Can you please elaborate on this. Is it possible that one or both of the alternators (or the regulators) could be damaged if both alternators are running concurrently in Z12. I'm trying to work out whether with Z12 I need to ensure that my primary al ternator is never pushed beyond its capacity (ie swap the L40 for an L60). The "sharing" scenario you described is correct when the SD-20 is regulated by the SB-1 and the aux alternator setpoint is about 1 volt lower than the main alternator. As long as your main alternator is adequately cooled=2C there is no risk of damage to the main alternator. I was curious as to what kind of loads you are anticipating that would require over 30A of continuous engine driven power. For example=2C you wouldn't have any exterior lights on along with pitot heat. Bob . . . --------------------------------------- ( . . . a long habit of not thinking ) ( a thing wrong=2C gives it a superficial ) ( appearance of being right . . . ) ( ) ( -Thomas Paine 1776- ) --------------------------------------- _________________________________________________________________ Looking for a new car this winter? Let us help with car news=2C reviews and more e%2Ecom%2Fcgi%2Dbin%2Fa%2Fci%5F450304%2Fet%5F2%2Fcg%5F801459%2Fpi%5F1004813 %2Fai%5F859641&_t=762955845&_r=tig_OCT07&_m=EXT ________________________________ Message 3 _____________________________________ Time: 07:06:15 AM PST US Subject: AeroElectric-List: Re: Z12 questions From: "rckol" Jim, I am not Bob, but will offer a response based on my own study. In both the Z-12 and Z-14 architectures, your SB-20 can be connected to any and all electrical devices on the ship. In the event that you loose your big alternator, it is up to you to manage your electrical usage to keep your consumption within with your means (batteries + SB-20). In this scenario, the advantage of the SB-1 is that it can provide you with an indication that you are reaching the current capacity of the alternator with an indicator light. With the LR-3, you are going to have to monitor this with an ammeter or load meter. -------- rck Read this topic online here: http://forums.matronics.com/viewtopic.php?p=248033#248033 ________________________________ Message 4 _____________________________________ Time: 12:53:17 PM PST US From: Ken Subject: Re: AeroElectric-List: Z12 questions Not positive what you are asking Bob but I'm approaching 300 hours with a 20 amp permanent magnet alternator and an 8AH battery as the second part of a Z-14 system. I run the strobes and a few things off that system and everything else off the other battery and 40 amp ND alternator. The voltage starts to sag a bit if you draw much more than 20 amps of course. The system works very well for my purposes. Both my batteries are 8AH and they auto parallel for cranking. That way I can still crank the electric dependent geared engine even if a battery is dead and the engine has stopped windmilling. Ken Bob Barrow wrote: > As others have suggested, it does seem like Z14 is my best option as I > have the L40 and SD20 already installed and I have 2 off LR3 regulators. > Too much trouble and expense to go sending back things to B&C for > exchange now from Australia. > > So I have purchased a second Odyssey AGM battery, in this case a PC310 > which is 7AH and weighs very little (2.7kg). > > Do you foresee of any problems with running the SD20 with the PC310 on > the secondary bus. > > Cheers Bob > ________________________________ Message 5 _____________________________________ Time: 03:24:39 PM PST US From: Subject: AeroElectric-List: Is there a way to have part 14V and part 28V? I have the opportunity to get some flight instruments from an acquaintance that is upgrading. The problem is they are all 28V. is there a way to have a part 28V and part 14V panel? Rodney Hall ________________________________ Message 6 _____________________________________ Time: 05:05:39 PM PST US From: "David LLoyd" Subject: Re: AeroElectric-List: Is there a way to have part 14V and part 28V? Rodney, Many small 14 to 28 v. converters are available for that purpose. Example.... when Garmin first came out with their 430 Navigator, their marketing plan was to capture most\all of the new aircraft OEM market. Great way to knock off King dominance. That meant they were designed for 28 v. In an older 14 v. aircraft you had to have an approved converter installed along with the 430. Garmin was smart enough to just have such an "approved unit. That is the way my C185D was done to get an early 430 installed as my main GPS Navigator. In homebuilts, the converter does not have to have the mass of paperwork approvals required and you should be able to find a good one for 1/10th what I was forced to pay. David Just make sure ----- Original Message ----- From: Sent: Sunday, June 14, 2009 3:17 PM Subject: AeroElectric-List: Is there a way to have part 14V and part 28V? > > I have the opportunity to get some flight instruments from an acquaintance > that is upgrading. The problem is they are all 28V. is there a way to have > a part 28V and part 14V panel? > > Rodney Hall > > > ________________________________ Message 7 _____________________________________ Time: 08:53:51 PM PST US From: "Greg Young" Subject: RE: AeroElectric-List: Is there a way to have part 14V and part 28V? Sure, I recently did it for my Navion's engine conversion. I got a 14v to 28v converter to feed a 28v bus just for the engine instruments. I had to use a holy watered part. Even for a relatively small power rating (~5a was all I needed) it was big, heavy and not cheap. But if it's worth it to you it's not a big deal. Regards, Greg Young > -----Original Message----- > From: owner-aeroelectric-list-server@matronics.com > [mailto:owner-aeroelectric-list-server@matronics.com] On > Behalf Of r.r.hall@cox.net > Sent: Sunday, June 14, 2009 5:17 PM > To: aeroelectric-list@matronics.com > Subject: AeroElectric-List: Is there a way to have part 14V > and part 28V? > > > I have the opportunity to get some flight instruments from an > acquaintance that is upgrading. The problem is they are all > 28V. is there a way to have a part 28V and part 14V panel? > > Rodney Hall > ------------------------------------------------------------------------------------- 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.