Wind-tunnel tests of dual-rotating propellers with systematic differences in number of blades, blade setting, and rotational speed of front and rear propellers

Author:	Gray, W. H.
Year:	1944
Document Type:	N/A
Series:	NACA Wartime Reports
Report Number:	NACA-WR-L-80, NACA-ARR-L4E22
Link:	https://digital.library.unt.edu/ark:/67531/metadc62182/