Category Archives: Section 37, Fuel System

G3X Components Section 37, Fuel System

Fuel Tank Sender Calibration

May 25, 2014. 8 hours

Today I went to Pearland Regional to get 40 gals of fuel to calibrate the fuel tanks. The G3X system makes this process very easy and straight forward. I decided to poor in 1 gal at a time which gave me great resolution. Although 1 gal at a time is a long drawn out process, I want good measurements.
I filled the left tank first and reached the tab at 22 gal. The sender unit stopped registering at 25 gals but the tank easily fit 30 gal. Stumped the tank, no contamination yet. I then disconnected the line from the mechanical fuel pump and turned on then electrical fuel boost pump and flowed several gal of fuel through it.

Flow Rate (left/right):
1 gal at 1 minute 16 seconds.

I did the same process to the right side with the same results.

I then pulled the purge valve control to the ICO position with the throttle at 1/2 and mixture fuel rich. Dave Forster my neighbor stopped by and lent some help with verifying fuel purge valve lines where flowing fuel. We then verified what the flow rate was I with the main fuel line from the mechanical fuel pump to the servo. This gave me a flow rate of 1 gal at 1 minute 14 seconds. We then pushed the tail all the way down to the ground, almost a 14 degree pitch ( I think I remembered that pitch correctly.). Again we pumped 1 minute 18 seconds, the pump inlet never un ported with only 2 gallon the tank.



Fuselage Section 37, Fuel System

Section 37, Fuel System – Andair Fuel Valve

December 28, Sectioned the tunnel cover into 3 different section. First section is forward of the brake pedals, second section was from aft brake pedal system to where the fuel valve is mounted. The third section is aft the fuel valve to the end of the original tunnel cover. This allows easier access to all the tunnel sections and allowed the fuel selector valve to be mounted much higher in the tunnel to allow a better fit with the carbon fiber center armrest. Spent 4 hours