Pump factor:
The unit calculates the fuel used from the pump power supplied the
fadec. Different pump models move different amounts of fuel at same voltage, so this
factor should be set to suit your particular pump+installation.
At moment of writing we don’t have a table of values for the different engines on
the market. The recommended calibration process is:
1)
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.
2)
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.
3)
After landing, before to shut down the receiver, check the % of remaining fuel
displayed on the telemetry screen.
4)
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 remain fuel in
respect to total capacity of the tank.
5)
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 set a pump factor of 400. After the flight you see that telemetry show
a remaining fuel quantity of 18%. Then you measure the tank, and you have a tank of
20cm long of a regular shape and the fuel that remain arrive to 5cm height of the total of
20cm.
Your remaining fuel is 5/20*100= 25%
The indicated fuel as per telemetry is 18%
The error is 18/25= 0,72. Then, the new pump factor should be 400 x 0,72= 288