Vortex-Lattice Treatment of Rectangular Wings with Oscillating Control Surfaces

摘要

The vortex-lattice method for simple harmonic motion of general frequency (R. & M. 2961) is used to calculate the derivatives for rectangular wings with oscillating constant-chord flaps.nComparison of the stability derivatives with values obtained by the Multhopp-Garner method, indicates that the present treatment for low frequency is satisfactory for full-span and outboard flaps on plan-forms of aspect ratio 2 and 4. For general frequencies, results for aspect ratio 2 with full-span flaps compare well with the values for lift and pitching-moment derivatives obtained by Lawrence and Gerber.