1983•19th Joint Propulsion ConferenceRequires access

In-flight acoustic test results for the SR-2 and SR-3 advanced-design propellers

Paul L. Lasagna, K. MACKALL, Robert Cohn

Abstract

Several advanced-design propellers, previously tested in the wind tunnel at the Lewis Research Center, have been tested in flight at the Dryden Flight Research Facility. The flight-test propellers were mounted on a pylon on the top of the fuselage of a JetStar airplane. Acoustic data for the advanced-design SR-2 and SR-3 propellers at Mach numbers to 0.8 and helical-tip Mach numbers to 1.15 are presented; maximum blade-passage frequency sound-pressure levels are also compared.

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Key concepts: Flight test, Test (biology), Aerospace engineering, Computer science, Engineering, Geology, Paleontology