On 2/11/2022 4:55 PM, Jeff Scott wrote:
However, the calibration was not completed correctly, so they only display
just over 3/4 when they tanks are full.
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
I calibrated the fuel senders in an RV10 for a friend of mine. It used
float type senders in the wing to a Skyview 10" flat screen. 30 gallon
tanks were calibrated in 2 gallon increments. A 5 volt signal changed
only a few tenths of a volt as each 2 gallon was added. Because the
wings had a slight dihedral the senders topped out at 21 gallon hitting
the top surface of the wing at the root. In this system the Skyview
indicates accurate gallons from 21 down to empty and above 21 gallon it
indicates 21+ gallons. Each system has it's own limitations. I
believe that the only "requirement" for a fuel gauge is to report
correctly at "empty".
The best system is to know what you're starting with and use an accurate
fuel flow device or record time, mentally or on paper, using engine burn
rate. In the Tripacer years ago I could start with full tanks, fly of 2
or 3 hours, and when refueling I could estimate to within a few tenths
of a gallon what was left in the tank.
Larry Flesner
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