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51
Foaming of Aircraft-Engine Oils as a Problem in Colloid Chemistry - 1
Report presenting an investigation conducted on the foaming characteristics of representative aircraft-engine lubricants in order to arrive at an adequate theory of the foaming of such oils. Methods of measuring foaming are compared and analyzed for their significant factors.
Date:
September 1944
Creator:
McBain, J. W.; Ross, S.; Brady, A. P.; Robinson, J. V.; Abrams, I. M.; Thorburn, R. C. et al.
System:
The UNT Digital Library
Wind-tunnel tests of single- and dual-rotating tractor propellers of large blade width
Report presenting tests of 10-foot diameter, single- and dual-rotating tractor propellers with two to eight blades conducted in the 20-foot propeller-research tunnel. The blades were 50 percent wider than those used in previous investigations. Results regarding the effect of dual rotation and effect of solidity are provided.
Date:
September 1942
Creator:
Biermann, David; Gray, W. H. & Maynard, Julian D.
System:
The UNT Digital Library
Representative Operating Charts of Propellers Tested in the NACA 20-Foot Propeller-Research Tunnel
Report presents the results of tests of full-scale propellers made in the 20-foot propeller-research tunnel (PRT) at the Langley Memorial Aeronautical Laboratory. The power coefficients of all dual-rotating propellers in the report represent the sum of the power coefficients of the front and rear propellers and are for the test conditions in which blade angles of the front and rear propellers were set to absorb approximately equal power at peak efficiency only.
Date:
September 1943
Creator:
Gray, W. H. & Mastrocola, Nicholas
System:
The UNT Digital Library