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Fuel Senders, Gauges, Accuracy

 
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n8vim(at)arrl.net
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PostPosted: Thu Jan 12, 2006 3:09 pm    Post subject: Fuel Senders, Gauges, Accuracy Reply with quote

Hi all!

Hopefully someone can give me some answers to an issue an RV-8
builder informed me of. Specifically, his tank holds 22 Gallons, he uses
15 gallons before the fuel gauge reads half. Since I don't have a gauge,
and I am about to put the rear baffle on, I'd like to get half to be as
close to half as possible!

Questions:
1. Anyone already built; With 15 Gallons in your tank:
A) What is the resistance of your sending unit?
B) What does your gauge read (half, 3/4, 1/4?)?

2. Anyone that has a gauge and the sending unit:
A) What resistance makes the gauge read:
a) 1/4
b) 1/2
c) 3/4
d) Full

Many thanks for replies!
-Jim 40384


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sfdarton(at)yahoo.com
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PostPosted: Thu Jan 12, 2006 3:54 pm    Post subject: Fuel Senders, Gauges, Accuracy Reply with quote

To any completed RV-10 owners

I would like to build a fuel tab Ala Cherokee. can
someone give me a dimension for 10 gallons down (20 in
the tank).

Thanks
Steve 40212 Tanks

--- James Hein <n8vim(at)arrl.net> wrote:

Quote:

<n8vim(at)arrl.net>

Hi all!

Hopefully someone can give me some answers to an
issue an RV-8
builder informed me of. Specifically, his tank holds
22 Gallons, he uses
15 gallons before the fuel gauge reads half. Since I
don't have a gauge,
and I am about to put the rear baffle on, I'd like
to get half to be as
close to half as possible!

Questions:
1. Anyone already built; With 15 Gallons in your
tank:
A) What is the resistance of your sending
unit?
B) What does your gauge read (half, 3/4,
1/4?)?

2. Anyone that has a gauge and the sending unit:
A) What resistance makes the gauge read:
a) 1/4
b) 1/2
c) 3/4
d) Full

Many thanks for replies!
-Jim 40384




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jesse(at)itecusa.org
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PostPosted: Wed Jan 18, 2006 1:46 pm    Post subject: Fuel Senders, Gauges, Accuracy Reply with quote

Jim,

We are using the floats, but are using a Dynon EMS to monitor the tanks
through the floats. When you calibrate the Dynon, they have you put in a
gallon or two at a time and it gets the new reading from the float. Having
done it this way, and having a fuel flow meter to check, and a history of
filling the tanks and using exactly what the fuel flow said we had burned,
the floats are almost always accurate within a gallon or two. Couldn't help
any on actual gauges, though. I wouldn't even consider putting a non-EMS
(read - individual gauges for monitoring engine and fuel) in a plane like
this anyway.

Jesse Saint
I-TEC, Inc.
jesse(at)itecusa.org
www.itecusa.org
Fax: 815-377-3694

I am in Ecuador until May, 2006. If you have questions regarding I-TEC,
please call the office at 352-465-4545. If you would like to talk to me,
please call me at 352-505-1899. This number won't always be on, but it has
voicemail that will get to me in Ecuador.

--


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Randy(at)abros.com
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PostPosted: Wed Jan 18, 2006 4:14 pm    Post subject: Fuel Senders, Gauges, Accuracy Reply with quote

I have the same experience with the ACS2500. The fuel in the tanks is
right on compared to the gauges. Randy

--


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