Wind-tunnel tests and analysis of two 10-foot-diameter six-blade dual-rotating tractor propeller differing in pitch distribution

Jean Gilman, Jr
naca-tn-1634
Jun 1948


An investigation was conducted at the Langley propeller-research tunnel to determine the efficiency at low tip speeds of two 10-foot-diameter six-blade dual-rotating propellers differing only in pitch distribution. Propeller forces were determined from wind-tunnel tests and were also calculated by an analytical method by use of two-dimensional airfoil section data.

An Adobe Acrobat (PDF) file of the entire report:
http://naca.central.cranfield.ac.uk/reports/1948/naca-tn-1634.pdf