Today's Message Index:
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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)
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| Subject: | [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
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| Subject: | 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
Message 2
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| Subject: | Re: 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
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