Brentner, Kenneth S.
Prediction of helicopter rotor discrete frequency noise : a computer program incorporating realistic blade motions and advanced acoustic formulation / Kenneth S. Brentner - 90 pages : illustrated ; 28 cm.
NASA Technical Memorandum 87721
Aeronautics
Airplaines
Helicopter
629.13436 / B75p
Prediction of helicopter rotor discrete frequency noise : a computer program incorporating realistic blade motions and advanced acoustic formulation / Kenneth S. Brentner - 90 pages : illustrated ; 28 cm.
NASA Technical Memorandum 87721
Aeronautics
Airplaines
Helicopter
629.13436 / B75p