---------------------------------------------------------- Europa-List Digest Archive --- Total Messages Posted Wed 01/16/08: 8 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 06:35 AM - Re: Rotax 912 electronic noise (Richard Lamprey) 2. 07:35 AM - Craig Bastin/William Daniel (Fergus Kyle) 3. 11:39 AM - Re: Craig Bastin/William Daniel (craig bastin) 4. 01:20 PM - Re: Rotax 912 electronic noise (Jan de Jong) 5. 02:46 PM - Re: Rotax 912 electronic noise (rampil) 6. 03:30 PM - Re: Re: Rotax 912 electronic noise (Tim Ward) 7. 03:43 PM - GRT Coolant Temperature Fixture (rlborger) 8. 05:18 PM - GRT Coolant Temperature Fixture (rlborger) ________________________________ Message 1 _____________________________________ Time: 06:35:01 AM PST US From: "Richard Lamprey" Subject: Re: Europa-List: Rotax 912 electronic noise Thanks Craig and Mike for your inputs. I have limited knowledge of electrics, but my thoughts about the sudden jump from 12 V to 14 Volt are that after startup the vast 22,000 microfarad capacitor is soaking up voltage until it has reached full capacitance; only after full capacity is reached, the system achieves the full 14 Volts, and the sudden jump occurs. If the engine has been run in the last couple of days, the system reaches 14 Volts immediately, since the capacitor has not in the short time 'bled' its charge. The delay and jump only occur after the system has sat without running for a long while. The same applies to the mysterious noise, ie doesnt occur after recent running... but I will apply my stethoscope to the regulator to see if thats the source. Yes weather here is fine, lovely sunshine all day! But the politics and post election violence has been disastrous for the country (as you may have seen on TV). Regards to all Richard ________________________________ Message 2 _____________________________________ Time: 07:35:42 AM PST US From: "Fergus Kyle" Subject: Europa-List: Craig Bastin/William Daniel Gentlemen, I am interested in your discourse regarding boosting a 912, but could you possibly do so without archiving a month of exchanges/? My pages are about 32 lines each and between the three messages (#3 - #5 incl) on today's list, there are 589 lines or about 196 lines average per message. I would guess the Matronics FAQ covers this well and respectfully ask you to cut back the archives. Regards for 2008 Ferg Kyle ________________________________ Message 3 _____________________________________ Time: 11:39:01 AM PST US From: "craig bastin" Subject: RE: Europa-List: Craig Bastin/William Daniel ok sorry about that, basically you want us to cut all the previous stuff out and go with just the answer yes. craig - 1:40 AM 1:40 AM ________________________________ Message 4 _____________________________________ Time: 01:20:24 PM PST US From: Jan de Jong Subject: Re: Europa-List: Rotax 912 electronic noise Hallo Richard, Forget about the capacitor. At 14 volts it can only hold 14 x 0,022 =0,3 Coulombs. A 10A source charges it in 0,3 / 10= 0,03 seconds. Your only large "capacitor" is the battery. If might support a 10A charging current for a little while, drawing down the bus voltage, but 12V seems low. Regards, Jan de Jong Richard Lamprey wrote: > Thanks Craig and Mike for your inputs. I have limited knowledge of > electrics, but my thoughts about the sudden jump from 12 V to 14 Volt > are that after startup the vast 22,000 microfarad capacitor is soaking > up voltage until it has reached full capacitance; only after full > capacity is reached, the system achieves the full 14 Volts, and the > sudden jump occurs. If the engine has been run in the last couple of > days, the system reaches 14 Volts immediately, since the capacitor has > not in the short time 'bled' its charge. The delay and jump only > occur after the system has sat without running for a long while. > > The same applies to the mysterious noise, ie doesnt occur after recent > running... but I will apply my stethoscope to the regulator to see if > thats the source. > > Yes weather here is fine, lovely sunshine all day! But the politics > and post election violence has been disastrous for the country (as you > may have seen on TV). > > Regards to all > Richard > * > > > * ________________________________ Message 5 _____________________________________ Time: 02:46:26 PM PST US Subject: Europa-List: Re: Rotax 912 electronic noise From: "rampil" Hi Richard, I am not sure that probabilities favor the electrics hypothesis. Most electronics without moving parts remain quite silent unless they are in the terminal stage of releasing their electronics, steam and smoke. Have you ruled out air, coolant, or oil flowing through some constriction? Carbon pile voltage regulators could make noise as the carbon heated, but I think that species went extinct in the 1960s. Best of Luck! -------- Ira N224XS Read this topic online here: http://forums.matronics.com/viewtopic.php?p=158640#158640 ________________________________ Message 6 _____________________________________ Time: 03:30:27 PM PST US From: "Tim Ward" Subject: Re: Europa-List: Re: Rotax 912 electronic noise Richard, Maybe Vacuum pump, or air driven Artificial Horizon or Directional Indicator or electrical Turn and Slip? Best of Luck. Tim Tim Ward 12 Waiwetu Street, Fendalton, CHRISTCHURCH 8052 NEW ZEALAND Ph :64 03 3515166 Mob: 021 0640221 email: ward.t@xtra.co.nz ----- Original Message ----- From: "rampil" Sent: Thursday, January 17, 2008 11:43 AM Subject: Europa-List: Re: Rotax 912 electronic noise > > Hi Richard, > > I am not sure that probabilities favor the electrics hypothesis. > Most electronics without moving parts remain quite silent unless they > are in the terminal stage of releasing their electronics, steam and smoke. > > Have you ruled out air, coolant, or oil flowing through some constriction? > > Carbon pile voltage regulators could make noise as the carbon heated, > but I think that species went extinct in the 1960s. > > Best of Luck! > > -------- > Ira N224XS > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=158640#158640 > > > ________________________________ Message 7 _____________________________________ Time: 03:43:26 PM PST US Subject: Europa-List: GRT Coolant Temperature Fixture From: rlborger Apple-Mail-15-1028816395-- ________________________________ Message 8 _____________________________________ Time: 05:18:07 PM PST US Subject: Europa-List: GRT Coolant Temperature Fixture From: rlborger All, Well, poo... Guess that last posting didn't work. So much for trying to send a pic. You can see the pics of the Grand Rapids Technology Coolant Temperature Fixture on my build web site (URL in my signature block). Go to the last album at the bottom of the page. This is a single fixture. They also have a dual fixture with two threaded openings, presumably for temperature and pressure. Good building and great flying, Bob Borger Europa Kit #A221 N914XL, XS Mono, Intercooled 914, Airmaster C/S http://www.europaowners.org/N914XL (90%) tail kit done, wings closed, cockpit module installed, pitch system in, landing gear frame in, rudder system in, outrigger mod in, Fuselage Top on, lift/drag/flap pins in, wing incidence set, tie bar in, flap drive in, Mod 70 done. Baggage bay in. Flaps & Main Gear complete. Mod 72 complete. Instrument panel complete, except for testing. Rotax 914 installed (for the 3rd time). Airmaster Prop installed. Electrical complete, except for testing. Fuel system complete except for testing. Working in - 32 Tail, 34 Door Latches & 35 Doors, 37 Interior & Finishing. Airmaster arrived 29 Sep 05. Seat arrived from Oregon Aero. E04 interior kit has arrived and is being installed. 3705 Lynchburg Dr. Corinth, TX 76208 Home: 940-497-2123 Cel: 817-992-1117 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message europa-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Europa-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/europa-list Browse Digests http://www.matronics.com/digest/europa-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.