Brief Description: Tested and calibrated fuel flow
My folks are visiting us, so I pressed my Dad into service to help with my first test of the fuel pumps and fuel flow monitoring system. The set up included gas containers on both sides of the airplane, with the fuel line to the carb disconnected and emptying into a 2-quart measuring cup. Using auto gas, I first tested each fuel pump and the fuel selector to make sure they all worked. Next I capped the end of the carb fuel line to check for pressure leaks. I then drilled a super small hole in the end cap to allow a small metered flow that could be measured. With that smallest hole, I ran the pump for six minutes, measured the flow and multiplied by 10 to get the gallons per hour. On my next test, I started adjusting the K factor setting in the Voyager EFIS to match the known fuel flow rate. To check my settings, I drilled the hole to a larger size and repeated the test several times. The K factor I arrived at was 9750 and the measurement appears to be exact. The only bit of unexpected excitement came when the capacitor for the overvolt protection system made a loud pop and was emitting bubbling hot fluid. After a quick disconnect and cool down, it became apparent that I had wired it with reversed polarity. I ordered a replacement and will do a better job of checking polarity next time.
