The effects of hub drag, solidity, dual rotation, and number of blades upon the efficiency of high-pitch propellers

Author:	Reid, Elliott G
Year:	1941
Document Type:	N/A
Series:	NACA Wartime Reports
Report Number:	NACA-WR-W-84, NACA-ACR
Link:	https://digital.library.unt.edu/ark:/67531/metadc62144/