9
Wet balance:
All the measures in previous pages had been done with the
fuel tank empty, as is normal practice for the manufacturers
of model airplanes to define the recommended CG position
with the plane “Dry”. The CGMeter allows showing the CG
drift when the plane is fueled, but to have this information,
we must feed it with the appropriate data.
On the “Data Entry” tab, you must enter the fuel capacity in
ml or US oz., and the distance from the center of the main
wheels to the center of the fuel tank, measured using same
procedure as the CG.
Touch the Submit button to store the settings and check the balance with the full tank.
As you can see in the screen shot, in this particular plane the
CG moves forward 18mm when the tank is full. So there is no
point in to fight for to achieve a less than 2 mm distance of the
balance point, when the fuel slosh will cause changes of 10
times higher.
Measuring the angles: (Option)
If you own the laser module, it includes an angle meter
to be used to measure and adjust the deflection angles
of the surfaces.
The inclination angle is displayed in degrees, and can be
zeroed. By entering the width of the control surface,
the app calculates the height of the tip from the
measured angle.
Also the battery voltage and runtime is displayed.
