A method for calculation of free-space sound pressures near a propeller in flight including considerations of the chordwise blade loading

Author:	Watkins, Charles E
Year:	1956
Document Type:	N/A
Series:	NACA Technical Notes
Report Number:	NACA-TN-3809
Link:	https://digital.library.unt.edu/ark:/67531/metadc56113/