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06-26-2010, 03:11 PM
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Join Date: Jun 2006
Location: Ottawa, Ontario, Canada
Posts: 2,116
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Fuel tank calibration
I filled my tanks for the first time today. I have a dynon and float type senders.
I used the dynon calibration procedure, adding about 2 gal at a time as directed.
Filled the left tank (about 18 gal), but after completion the dynon gauge only seems to show 15 gal.
During calibration of right tank, the sender value stopped changing after about 14 gal (sender value about 72)
and after completion the dynon gauge only shows 14 gal.
Anyone else encountered this?
__________________
Phil
RV9A (SB)
Flying since July 2010!
Ottawa, Canada
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06-26-2010, 04:09 PM
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Join Date: Mar 2005
Location: Dallas area
Posts: 10,762
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The fuel senders are in the inboard end of the tank. When they reach the top, fuel continues to flow into the tank filling the outboard end. Because of the dihedral, the sender never sees the last 3-4 gallons.
__________________
Mel Asberry, DAR since the last century.
EAA Flight Advisor/Tech Counselor, Friend of the RV-1
Recipient of Tony Bingelis Award and Wright Brothers Master Pilot Award
USAF Vet, High School E-LSA Project Mentor.
RV-6 Flying since 1993 (sold)
<rvmel(at)icloud.com>
Last edited by Mel : 06-26-2010 at 08:17 PM.
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06-26-2010, 04:17 PM
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Join Date: Mar 2006
Location: Newport, TN
Posts: 7,496
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Yep,
Like Mel sez, this is just the way it is. Has nothing to do with Dynon, it is a limitation on the sender and where it is located in the tank.
The capacitive ones can show closer to the top due to where the outboard plate is located.
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06-26-2010, 08:11 PM
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Join Date: Jun 2006
Location: Ottawa, Ontario, Canada
Posts: 2,116
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ok, thanks guys. Glad to know this is not an issue.
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Phil
RV9A (SB)
Flying since July 2010!
Ottawa, Canada
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06-26-2010, 09:20 PM
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Join Date: Apr 2005
Location: KSLC
Posts: 4,021
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Quote:
Originally Posted by prkaye
ok, thanks guys. Glad to know this is not an issue.
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This is why I like my fuel flow gauge. It's one of the best addons I installed after flying. I don't even look at the tank gauges much.
L.Adamson --- RV6A |
06-27-2010, 06:27 PM
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Join Date: Feb 2006
Location: Anywhere, USA
Posts: 1,132
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Fuel Hawk Universal
Also use a Fuel Hawk Universal fuel guage.
I calibrated my tanks with that. I have the measurements
on these if anyone needs it.
In 1 gallon ticks.
FYI---read 000 till it went to 6 gallons on the fuel hawk, or the
tank was still dry when you looked in there. 
__________________
Bruce (BOOMER) Pauley
Kathy (KAT) Pauley
RV 7A--"MISS MARIE"--- N177WD (SOLD FLYING)72742
VAF #582-----------------EAA LIFETIME MEMBER
EX -KC-135A -------------BOOM OPERATOR #3633
VAN'S FLIGHT------------#6930
See you in OSHKOSH
http://www.mykitlog.com/users/index....ley&project=84
=VAF= 2006-2020 DUES PAID 
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