Study of Cost/Benefit Tradeoffs Available in Helicopter Noise Technology Applications

Abstract

This study investigated cost/benefit tradeoffs using the case histories of four helicopters for which design and development were complete, and in three cases, have undergone substantial flight testing. The approach to quieting each helicopter was an incremental reduction of each source as required to obtain reductions in flyover noise with modifications to other secondary systems only as necessary. The methodology used to predict the effects of the design modifications on acquisition, maintenance, and operating costs were typical of those employed by rotorcraft manufacturers. The reduction of helicopter flyover noise generally was achieved through reductions in rotor tip speed. Performance characteristics were maintained to specified minimums for each aircraft in the study.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1980
Accession Number
ADA083955

Entities

People

  • H. Sternfeld Jr.
  • R. H. Spencer

Organizations

  • Boeing Rotorcraft Systems

Tags

Communities of Interest

  • Air Platforms
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Acoustics
  • Aerospace Industry
  • Aircraft Equipment
  • Aircraft Industry
  • Aircrafts
  • Airframes
  • Composite Materials
  • Computer Programs
  • Engine Noise
  • Helicopter Rotors
  • Helicopters
  • Mach Number
  • Rotary Wing Aircraft
  • Test And Evaluation
  • Test Facilities
  • Transport Aircraft
  • Turbines

Readers

  • Acoustics.
  • Aerospace Engineering
  • Life Cycle Cost Analysis