Method for determining longitudinal pneumatic data of solar unmanned aerial vehicle

The invention discloses a method for determining longitudinal pneumatic data of a solar unmanned aerial vehicle. The method comprises the following steps: determining a series of class angles of attack corresponding to longitudinal pneumatic data to be acquired; the lift line method is used for calculating lift coefficients corresponding to all attack angles of the wings of the solar unmanned aerial vehicle in a sideslip-free state; the wing lift line slope of the lift line method is calculated; calculating a lift coefficient and a pitching moment coefficient of the wing at the attack angle to be obtained by a vortex grid method or a strip theory; calculating a wing lift line slope of a vortex grid method or a strip theory; calculating a wing lift line slope correction factor; calculating a whole-aircraft lift coefficient, a whole-aircraft resistance coefficient and a whole-aircraft pitching moment coefficient by a vortex grid method or a strip theory; the resistance coefficient of the whole aircraft at the i