Acoustic flight test experience with the XV-15 Tiltrotor aircraft with the Advanced Technology Blade (ATB)An acoustic model that predicts the discrete frequency noise characteristics of helicopter rotors has been utilized in an analysis to help identify source characteristics. This technique incorporated a NASA Langley developed acoustic prediction technique, and a simplified flow field model to account for rotor wake reingestion in hover. The vehicle rotor system was modified to include the ATBs that were designed to provide for higher operating weights and improved maneuver load factor in helicopter and transition modes of operation.
Document ID
19930035146
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Hoad, Danny R. (NASA Langley Research Center Hampton, VA, United States)
Conner, David A. (NASA Langley Research Center Hampton, VA, United States)
Rutledge, Charles K. (Lockheed Engineering and Sciences Co. Hampton, VA, United States)