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Ron's Web Site
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Date: 1-4-2011
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Number of Hours: 3.00
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Manual Reference:
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Brief Description: Recalibration of Aux Tank Fuel Quantity
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I had forgotten to drain the aux tank fuel in the level condition, and so the unuseable fuel was probably higher than it should be, contributing to a larger empty weight. Accordingly, I leveled the aircraft and pumped out the aux fuel to the main tanks until the pumps were pushing air. I then repeated the process of calibrating the aux tanks, adding fuel and entering the analog/digital data into the EFIS calibration page. I ended up adding 9.8 gallons of fuel into both aux tanks to fill them, 6.1 gallons more than previously. Avipro states that the aux tank capacity is 11 gallons, indicating that the unuseable fuel is 1.2 gallons per tank. Accordingly, 36.6 pounds of fuel needs to be subtracted from the empty weight at station 29.6 inches, which results in a moment of 1083.4 inch-lbs. The resulting empty weight, arm and moment is 1692 lbs, 10.9 inches, 18492 inch-lbs.
I also verified the fuel selector completely shut off the full flow when in the "OFF" position.
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