---------------------------------------------------------- RV7-List Digest Archive --- Total Messages Posted Mon 11/30/09: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 0. 12:22 AM - [Please Read] - Last Official Day of List Fund Raiser! (Matt Dralle) 1. 06:20 PM - CAPACITIVE FUEL SENDING UNITS (Dan Bergeron) 2. 07:22 PM - Re: CAPACITIVE FUEL SENDING UNITS (William Gill) ________________________________ Message 0 _____________________________________ Time: 12:22:13 AM PST US From: Matt Dralle Subject: RV7-List: [Please Read] - Last Official Day of List Fund Raiser! Dear Listers, Its November 30th and that means at least two things. For better or worse, its my 46th birthday! But it also means that its that last official day of the Matronics Email List Fund Raiser! If you been jones'n over one of the really nice gifts that are available this year with a qualifying Contribution, then now is the time to jump on one!! If you've been meaning to make a Contribution this month but have been putting it off for some reason, NOW is the time! I will be posting the List of Contributors in a few days, so you'll probably want to be known as a person that supported the Lists! I want to thank everyone that has so generously made a Contribution so far this year in support of our Lists. It is your generosity that keeps this operation a float and I don't ever forget it. Hopefully everyone feels the same. The List Contribution Web Site is fast and easy. Please support our habit by making your Contribution right now: http://www.matronics.com/contribution Thank you to all in advance! Matt Dralle Matronics Email List Administrator ________________________________ Message 1 _____________________________________ Time: 06:20:19 PM PST US Subject: RV7-List: CAPACITIVE FUEL SENDING UNITS From: Dan Bergeron AFTER SIX + YEARS OF BUILD TIME, I'VE BEEN FLYING MY RV-7A SINCE EARLY AUGUST. FIRST FLIGHT WAS BY FRIEND AND MENTOR FRED STUCKLEN, OUT OF NORTHAMPTON AIRPORT (7B2), MASSACHUSETTS. I HAVE THE GRT, EIS AND EFIS, SINGLE AHARS, DUAL SCREEN UNIT, WITH A GARMIN AVIONICS STACK AND A/P. THE 63 HOURS ON THE AIRPLANE HAVE BEEN FREE OF ANY MAJOR ISSUES AND MOST OF THE MINOR ONES, E.G., THE CUSTOMARY HEAVY LEFT WING, HAVE BEEN RESOLVED. THE ONE REMAINING ISSUE IS WITH THE FUEL GAUGES. THE FUEL TOTALIZER WORKS FINE AND IS ACCURATE TO WITHIN A FRACTION OF A GALLON AFTER A 90 MINUTE FLIGHT, BUT THE INDIVIDUAL TANK GAUGES HAVE NEVER WORKED PROPERLY. I INSTALLED THE VANS CAPACITIVE SENDING UNITS IN THE TANKS WITH PRINCETON CONVERTER UNITS. THE GAUGES MAY OR MAY NOT SHOW FUEL AMOUNT FOR A FEW MINUTES AFTER REFUELING, WITH THE TANKS FULL, BUT ALWAYS DROP OFF LINE QUICKLY AND THEN SHOW NOTHING. I'VE CALLED GRT FOR ADVICE AND, FOR A SHORT TIME, THOUGHT WE HAD SOLVED THE PROBLEM BY USING A DIFFERENT PROGRAMMING SEQUENCE FOR THE CONVERTER UNITS. BUT - IT WAS NOT TO BE! HAS ANYONE HAD SIMILAR PROBLEMS WITH THE CAPACITIVE FUEL GAUGE SYSTEM AND HOW DID YOU GET IT RESOLVED? I'M AT THE POINT WHERE I'M SERIOUSLY CONSIDERING REMOVING THE TANKS AND INSTALLING FLOAT TYPE SENDING UNITS. DAN BERGERON dan.pat.b@gmail.com ________________________________ Message 2 _____________________________________ Time: 07:22:46 PM PST US From: "William Gill" Subject: Re: RV7-List: CAPACITIVE FUEL SENDING UNITS Hello Dan, I had a similar issue with one tank which was quickly resolved. Review your calibration numbers and make sure each data point (fuel qty) is different and changes in the same direction from your starting fuel calibration qty to full tank. The capacitive value can be manually over-written in the calibration menu and slightly altering the value as directed by AFS corrected my faulty fuel reading...or at least that is the case with the AFS-2500 engine monitor. My capacitive fuel qty set-up from Van's with the Princeton converters is extremely accurate...would not consider alternatives. Regards, Bill RV-7 N151WP Lee's Summit, MO ----- Original Message ----- From: Dan Bergeron To: rv7-list@matronics.com Sent: Monday, November 30, 2009 8:15 PM Subject: RV7-List: CAPACITIVE FUEL SENDING UNITS AFTER SIX + YEARS OF BUILD TIME, I'VE BEEN FLYING MY RV-7A SINCE EARLY AUGUST. FIRST FLIGHT WAS BY FRIEND AND MENTOR FRED STUCKLEN, OUT OF NORTHAMPTON AIRPORT (7B2), MASSACHUSETTS. I HAVE THE GRT, EIS AND EFIS, SINGLE AHARS, DUAL SCREEN UNIT, WITH A GARMIN AVIONICS STACK AND A/P. THE 63 HOURS ON THE AIRPLANE HAVE BEEN FREE OF ANY MAJOR ISSUES AND MOST OF THE MINOR ONES, E.G., THE CUSTOMARY HEAVY LEFT WING, HAVE BEEN RESOLVED. THE ONE REMAINING ISSUE IS WITH THE FUEL GAUGES. THE FUEL TOTALIZER WORKS FINE AND IS ACCURATE TO WITHIN A FRACTION OF A GALLON AFTER A 90 MINUTE FLIGHT, BUT THE INDIVIDUAL TANK GAUGES HAVE NEVER WORKED PROPERLY. I INSTALLED THE VANS CAPACITIVE SENDING UNITS IN THE TANKS WITH PRINCETON CONVERTER UNITS. THE GAUGES MAY OR MAY NOT SHOW FUEL AMOUNT FOR A FEW MINUTES AFTER REFUELING, WITH THE TANKS FULL, BUT ALWAYS DROP OFF LINE QUICKLY AND THEN SHOW NOTHING. I'VE CALLED GRT FOR ADVICE AND, FOR A SHORT TIME, THOUGHT WE HAD SOLVED THE PROBLEM BY USING A DIFFERENT PROGRAMMING SEQUENCE FOR THE CONVERTER UNITS. BUT - IT WAS NOT TO BE! HAS ANYONE HAD SIMILAR PROBLEMS WITH THE CAPACITIVE FUEL GAUGE SYSTEM AND HOW DID YOU GET IT RESOLVED? I'M AT THE POINT WHERE I'M SERIOUSLY CONSIDERING REMOVING THE TANKS AND INSTALLING FLOAT TYPE SENDING UNITS. DAN BERGERON dan.pat.b@gmail.com ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rv7-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RV7-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/rv7-list Browse Digests http://www.matronics.com/digest/rv7-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.