Aerodynamic Characteristics in the Approach, Superfine and Negative Pitch Ranges of Two Four-Bladed Propellers with N.A.C.A. Series 16 Blade Sections.

Abstract

Tests were conducted on two similar full-scale propellers in tim 24-ft Wind Tunnel at the Royal Aircraft Establishment by representatives of Rotol, Ltd. and de Havilland Propellers, Ltd. to measure the aerodynamic characteristics over a blade-angle range of - 20 deg to + 40 deg, measured at the 0.7 radius, and over a range of advance ratio of 0.1 to 2.4.