---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Sat 06/09/12: 7 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 12:21 AM - Re: AeroElectric-List Digest: 14 Msgs - 06/08/12 (Franz Fux) 2. 06:13 AM - Bi-ennial transponder/encoder/static certifications (bakerocb) 3. 06:36 AM - Re: 9 lb battery/jumpstart kits (Robert L. Nuckolls, III) 4. 06:51 AM - Re: Re: OS Wig-Wag Project (Robert L. Nuckolls, III) 5. 08:24 AM - Re: Bi-ennial transponder/encoder/static certifications (Eric M. Jones) 6. 08:42 AM - Re: OS Wig-Wag Project (gregmchugh) 7. 10:30 AM - Re: Bad Contactor Diode? (Robert L. Nuckolls, III) ________________________________ Message 1 _____________________________________ Time: 12:21:30 AM PST US From: "Franz Fux" Subject: AeroElectric-List: Re: AeroElectric-List Digest: 14 Msgs - 06/08/12 only intermittent access to e-mail until June 19th, in an urgent matter contact info@lastfrontierheli.com ________________________________ Message 2 _____________________________________ Time: 06:13:44 AM PST US From: "bakerocb" Subject: AeroElectric-List: Bi-ennial transponder/encoder/static certifications 6/9/2012 Hello Ralph Capen, Kelly McMullen has given you some good words on this subject, but I would like to clarify one point. Kelly wrote: "You can leak test your static system if you ever need to open it between the required certifications, and that is legal, ......" This is true only if you meet one of the qualification requirements listed in paragraph 91.411 (b). See a copy of that paragraph below: "91.411 Altimeter system and altitude reporting equipment tests and inspections. (a) No person may operate an airplane, or helicopter, in controlled airspace under IFR unless- (1) Within the preceding 24 calendar months, each static pressure system, each altimeter instrument, and each automatic pressure altitude reporting system has been tested and inspected and found to comply with appendices E and F of part 43 of this chapter; (2) Except for the use of system drain and alternate static pressure valves, following any opening and closing of the static pressure system, that system has been tested and inspected and found to comply with paragraph (a), appendix E, of part 43 of this chapter; and (3) Following installation or maintenance on the automatic pressure altitude reporting system of the ATC transponder where data correspondence error could be introduced, the integrated system has been tested, inspected, and found to comply with paragraph (c), appendix E, of part 43 of this chapter. (b) The tests required by paragraph (a) of this section must be conducted by- (1) The manufacturer of the airplane, or helicopter, on which the tests and inspections are to be performed; (2) A certificated repair station properly equipped to perform those functions and holding- (i) An instrument rating, Class I; (ii) A limited instrument rating appropriate to the make and model of appliance to be tested; (iii) A limited rating appropriate to the test to be performed; (iv) An airframe rating appropriate to the airplane, or helicopter, to be tested; or (3) A certificated mechanic with an airframe rating (static pressure system tests and inspections only)." Note that holding only a Repairman's Certificate for a specific experimental amateur built aircraft is not listed as one of the persons qualified to perform static pressure system tests and inspections (in order to detect a leak) on the aircraft that he is rated for. Please let me know if you have any questions on this subject. 'OC' Baker Says: "The best investment we can make is the time and effort to gather and understand knowledge." PS: It is possible that some FAA employee has given the OK for some Repairman to perform a static pressure system leak test on his experimental amateur built aircraft, but that does not constitute a universal change the regulation. Besides what equipment and test performance criteria would the Repairman use to determine whether or not he had an acceptable leak? Hint: The answer to this question can be found in the Matronics aeroelectric list archives. (Search for "static check" dated Sep 11) ========================================================== >From: Kelly McMullen >Sent: Jun 8, 2012 10:22 AM >To: avionics-list@matronics.com >Subject: Re: Avionics-List: Bi-ennial transponder/encoder/static >certifications > >--> Avionics-List message posted by: Kelly McMullen > >A common misconception. Yes you built your aircraft. That does not make >you a "manufacturer" in the terms of these regulations. >You need the transponder certified by someone with a repair station >license. There is no certification of the pitot system, only the static >system. The only reason the pitot is connected to the test is to protect >your airspeed indicator from an excessive pressure difference with the >static port. >You can leak test your static system if you ever need to open it between >the required certifications, and that is legal, but the certification >must be done by an appropriately rated repair station. >Kelly McMullen >A&P/IA, EAA Tech Counselor =========================================== > >On 6/8/2012 6:46 AM, Ralph E. Capen wrote: >> --> Avionics-List message posted by: "Ralph E. Capen" >> >> >> In reading 91.411 and 91.413, it says the manufacturer of the airplane >> can perform the tests. >> >> Since I built my 6A, I'm thinking that I cando the tests myself and make >> the logbook entry. >> >> Testing the transponder codes might be the difficult part - but I have >> already built the test equipment and tested the Pitot-static system and verified the altitude goung to the transponder is correct. >> >> Thoughts please, >> Ralph ________________________________ Message 3 _____________________________________ Time: 06:36:47 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: 9 lb battery/jumpstart kits Just confirming what Ron has already asserted . . . here's a 1-amp discharge curve on one of the batteries he sent me: Emacs! This test article delivered just over 11 a.h. at the 1-amp so I suspect the 20 hour rate is about 0.8 amps for a total of 12 a.h. Both of the batteries I received were in the 180-200 amp range for 15 second cranking currents. Bob . . . ________________________________ Message 4 _____________________________________ Time: 06:51:16 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Re: OS Wig-Wag Project At 06:03 PM 6/7/2012, you wrote: > >Bob, > > >If you want the initial software to support the variable flash rate >on the wig-wag I can handle that. Let me know how you want >to configure the changes to the inputs. Is the board you sent >me already set up to handle this with the way it is configured? >I can add the two other input lines to the test harness you >sent. Are you in possession of the tools and skills to work with 1206 surface mount components? The board I sent you has Emacs! R26 and R27 installed. Those need to be removed and replaced by R11 and R14. I don't try to 'save' a removed SMD component. So I'd wick the solder off the two un-needed resistors and install two new ones. Why don't I assemble the second board configured for two sets of control inputs and you could put the finishing touches on your code. >I would think that three rate settings would be enough, maybe >45 flashes per minute for the default rate, and then 90 and 120 >flashes for higher rates. That would be the flash rate for >each of the lamps, alternating lamps to get the wig-wag. The LEDs are much more effective at the high rates than incandescent lamps. 3 events per second is supposed to be the 'magic' attention-getter. Those values sound good to me. >I would think that 3 rate settings would be enough using the >same type of switch you have on the other set of inputs. Let me pray over some controls topology for adding independent control of the two lights. Bob . . . ________________________________ Message 5 _____________________________________ Time: 08:24:57 AM PST US Subject: AeroElectric-List: Re: Bi-ennial transponder/encoder/static certifications From: "Eric M. Jones" > I have a high confidence level in taking it to a 'certified' shop...Bi-ennial transponder/encoder/static certifications (Ralph E. Capen) Definitions for Airmen: Certified: Endorsed by authorities as having met specific requirements or possessing certain qualities; e.g. " Certified Public Accountant", i.e., a person skilled at altering or destroying documents, ignoring or failing to investigate shell companies created by insiders who grotesquely enriched themselves while hiding mounting corporate debt in "off-balance-sheet companies"; Ignoring knowledgeable whistleblowers and accounting "red flags" that indicate massive fraud is taking place; misleading investors who continued pouring their money into failing companies. See Enron. Certifiable: Determined to be insane or non compos mentis; e.g. I know who I am. No one else knows who I am. If I was a giraffe, and someone said I was a snake, I'd think, no, actually I'm a giraffe. - Richard Gere Certificated: Something or someone judged to meet certain standards, e.g. airworthiness or as in certificated flight instructor. The term signifies that a printed official-looking paper (a ticket, slang for certificate) is somewhere to be found. Discussion--The FAA is quite careful to use the word certify only in the sense of swear to the truthfulness of or affirm. For example: you only have to certify that you have no medical defect You must certify the application form by reading, answering, signing, and dating. to certify the record is true and complete. In good humor, Eric M. Jones -------- Eric M. Jones www.PerihelionDesign.com 113 Brentwood Drive Southbridge, MA 01550 (508) 764-2072 emjones(at)charter.net Read this topic online here: http://forums.matronics.com/viewtopic.php?p=375119#375119 ________________________________ Message 6 _____________________________________ Time: 08:42:27 AM PST US Subject: AeroElectric-List: Re: OS Wig-Wag Project From: "gregmchugh" Bob, I won't attempt to make the changes to the board. I will send out a flashed PIC today with the default code that I have been using for testing. When you send me a board with the inputs reconfigured we can decide on how to configure the variable flash rate option. Attached is the source code for the PIC I am sending you. Greg McHugh Read this topic online here: http://forums.matronics.com/viewtopic.php?p=375122#375122 Attachments: http://forums.matronics.com//files/wigwag_432.c ________________________________ Message 7 _____________________________________ Time: 10:30:59 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Bad Contactor Diode? At 08:56 AM 5/8/2012, you wrote: Recently a friend of mine purchased an RV-6A, and shortly after buying it he turned the master switch on one morning, there was a "poof", and the wire supplying the ground to the battery contactor burnt up. This is an exceedingly rare event. So rare that legacy design goals in TC aircraft do not incorporate any form of protection for this particular wire . . . The airplane needed some major electrical work (even prior to this). It was wired basically according to Z-11 (I recognized the architecture straight away) but CRUDE! Cripes... Anyway, we changed out the contactor as it was pretty rough looking and I had a new one on the shelf from Spruce. But it didn't have a spark catching diode so we used the old diode that the previous owner had made up. This time when he powered it up (hanging onto the ground wire) he felt the wire getting hot immediately and killed the power before anything flamed. Changed the contactor completely and put a new one from B&C (with the supplied diode) in and the problem went away. 6/9/12 The contactor and diode you sent me have been inspected. The contactor appears functional and draws the expected current. The diode was indeed shorted. The terminals on the diode were of the size needed to insure proper installation so I'm at a loss to explain the diode failure. 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.