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The recommended calibration process is:
Enter the fuel capacity of your plane in the “tank capacity” menu. Leave the pump factor
at the default 400 unit, unless you know a more accurate figure for your engine model.
1)
Do a normal flight; use your usual timer to determine the length of the flight.
Ignore on this flight the % of fuel in the tank displayed by the telemetry on
landing.
2)
After landing, before to shut down the receiver, check the % of remaining
fuel displayed on the telemetry screen.
3)
Measure the real quantity of fuel left. If you use a regular shape tank
(cylindrical, square, etc) them you can measure the height of the remaining
fuel in respect to total capacity of the tank.
4)
Once you know the % displayed on the radio and the real % of fuel in the
tank, you can calculate the correct pump factor in your plane.
Example: You have a tank of 2.000ml (67Oz) and have set the pump factor at default 400. After
the flight you see that telemetry show a remaining fuel quantity of 18% (360ml on Spektrum).
Then you measure the tank, and you have a tank of 20cm long of a regular shape and the fuel
level arrives to 5cm height of the total of 20cm.
Your remaining fuel is 5/20*100= 25% (500ml)
The indicated fuel as per telemetry is 18% (360ml on Spektrum telemetry)
The error is 18/25= 0,72. (360/500=0,72 for Spektrum systems) Then, the new pump factor
should be the initial value of 400 multiplied by 0,72= 288. Enter 288 on pump factor and
calibration is done.
Picture 3
