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Old 04-20-2022, 05:56 PM
Robb Robb is offline
Join Date: Sep 2015
Location: Nevada City Ca
Posts: 267
Default F1 EVO fuel gauge inop

The fuel gauges in my F1 do not work so I fly by fuel consumption on my GRT display. There is a note in the builder log that they will not work due to wing design. Just wondering if any other EVO wing guys have theirs functional? Not critical as I monitor it a few different ways but it would be nice to have them function. I have SN 175 early build in 2006
Aviat Husky A1B
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Old 04-21-2022, 02:31 AM
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F1Boss F1Boss is offline
Join Date: Aug 2006
Location: Taylor Texas
Posts: 850
Default INOP?

Are the gages both INOP? The floats will read full until the fuel drops to ~16 gal or so - due to the long tanks.

"Not everyone needs a Rocket. Some folks, however, shouldn't live life without one.
You know who you are."
Budd Davisson, 1997
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Old 04-24-2022, 06:52 PM
molson309 molson309 is offline
Join Date: Jul 2009
Location: Longmont, CO
Posts: 254

My gauges work as Mark described. Stay on "F" a long time but eventually drop after the fuel quantity is below about 16 gallons.
Mark Olson
RV-7A First flight 2005 Sold 2019
F1-EVO Rocket First flight 2010
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Old 04-26-2022, 09:38 AM
AviatorJ AviatorJ is offline
Join Date: Feb 2015
Location: Oklahoma City
Posts: 997

My 10 does the same thing, I think that's just the nature of those floats. My red cube is pretty accurate though.
RV-10, N10JW
Flying since 2/14/2019
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Old 04-29-2022, 10:17 AM
I-TERA's Avatar
I-TERA I-TERA is offline
Join Date: Jan 2014
Location: legnano (milan) italy
Posts: 30

As F1Boss said the geometry of the wings and the length of the tank prevent the float from moving until there are 16 gallons left. With a capacitive level sensor and two plates positioned appropriately it is possible to have a correct indication from full to empty, the obtainable precision is in the range of 1/4. The photographs are explanatory.
The major drawback of the electronic sensor is the reading error when using fuel containing alcohol that has absorbed humidity.
Claudio Ricci
F1 Rocket EVO
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