The paper introduces the difficulties met in A/C loads calculation during abrupt pitching maneuver and rolling pullout, and in wing load calculation during rolling maneuvers.

The final test occurred Apr. 21 when the wing and trailing edges were subjected to their limit load of around 2.5g, the highest loads expected to be seen in service.

As an example of large sized structural component, the mechanical model of load calibration test of an airplane wing was analysed.