Active Arm (External Cargo) Stabilization System Flight Demonstration.

Abstract

Development of an advanced Active Arm External Load Stabilization System (AAELSS II) for helicopters has been accomplished through analysis, ground test, and flight evaluation of the concept on a CH-47C aircraft. Hydraulically powered arms mounted beneath the helicopter automatically control load motion to provide pendular damping levels in excess of 25% of critical. The system completely eliminates longitudinal pilot-induced oscillation (PIO) tendencies, permitting full envelope instrument meterological conditions (IMC) flight with heavy external payloads. Potential for precision hover load placement and flight with unstable loads exists. The design is also capable of operating with winchable HLH cargo hoist cable systems. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1976
Accession Number
ADA031062

Entities

People

  • James H. Smith
  • Theodore S. Garnett Jr.

Organizations

  • Boeing Rotorcraft Systems

Tags

Communities of Interest

  • Air Platforms
  • Human Systems
  • Sensors
  • Weapons Technologies

DTIC Thesaurus Topics

  • Actuators
  • Aircraft Equipment
  • Aircrafts
  • Airframes
  • Assembly
  • Control Panels
  • Control Systems
  • Engineers
  • Failure Mode And Effect Analysis
  • Fuselages
  • Insensitive Explosives
  • Load Distribution
  • Production
  • Signal Generators
  • Stabilization Systems
  • Test And Evaluation
  • Test Equipment

Fields of Study

  • Physics

Readers

  • Aerospace Engineering
  • Aviation Science / Aeronautics.
  • Control Systems Engineering.