Richard P. Woodward

• Aeroacoustic effects of reduced aft tip speed at constant thrust for a model counterrotation turboprop at takeoff conditions
• Background noise levels measured in the NASA Lewis 9-by 15-foot low-speed wind tunnel
• In-flight near- and far-field acoustic data measured on the propfan test assessment (PTA) testbed and with an adjacent aircraft
• Inflight source noise of an advanced full-scale single-rotation propeller
• Measured far-field flight noise of a counterrotation turboprop at cruise conditions
• Noise of a counterrotation propeller with simulated fuselage and support pylon at takeoff/approach conditions
• Noise of a model counterrotation propeller with reduced aft rotor diameter at simulated takeoff/approach conditions (F7/A3)
• Noise of a model high speed counterrotation propeller at simulated takeoff/approach conditions (F7/A7)
• Noise of a simulated installed model counter rotation propeller at angle-of-attack and takeoff/approach conditions