Flight Test Evaluation of the Three-Axis Mechanical Stability Augmentation System

Abstract

Results are presented of flight tests conducted to evaluate a three- axis mechanical stability augmentation system (MSAS), known as 'Dynagyro', on a UH-1 helicopter. The purpose of a stability augmentation system is to augment the stability and control characteristics of unstable or weakly stable aircraft so as to provide satisfactory flying qualities. The tests encompassed 9-1/2 flight hours and approximately 3 hours of ground and hangar testing. The MSAS included an entirely new concept: vortex valve fluidic servoactuators. The magnitude of the installation and conversion procedure for installing the MSAS, was relatively small. The MSAS, as tested, did not perform as well in the helicopter as it did in the laboratory or as well as theory indicated it should.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1970
Accession Number
AD0880677

Entities

People

  • George W. Fosdick

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Space

DTIC Thesaurus Topics

  • Aircrafts
  • Amplitude
  • Angular Acceleration
  • Army Aviation
  • Control Systems
  • Conversion
  • Directional
  • Frequency
  • Heat Exchangers
  • Helicopters
  • Instrumentation
  • Mobility
  • Power Supplies
  • Stabilization Systems
  • Temperature Control
  • Test And Evaluation
  • Virginia

Readers

  • Aerospace Test and Evaluation
  • Control Systems Engineering.
  • Robotics and Automation.