FLIGHT RESEARCH PROGRAM TO EVALUATE METHODS OF IMPROVING COMPOUND HELICOPTER MANEUVER CAPABILITY

Abstract

The results of a flight research program conducted to investigate methods of improving maneuvering capability of the UH-2 compound helicopter are presented. The effects of wing/rotor load sharing were determined during symmetrical pullup maneuvers using preselected longitudinal cyclic inputs. The wing/rotor load sharing ratio was varied by automatically reducing collective pitch as a function of normal load factor. This was found to increase the attainable maximum normal load factor by 78 percent. Automatic reduction of collective pitch also reduced longitudinal cyclic control sensitivity during maneuvering flight. Roll control augmentation using ailerons was found to be one satisfactory method for imparting acceptable handling qualities for lateral/ directional maneuvers in compound aircraft.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1968
Accession Number
AD0670942

Entities

People

  • A. D. Rita
  • W. E. Blackburn

Organizations

  • Kaman Corporation

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aircrafts
  • Airfoils
  • Army Aviation
  • Closed Loop Systems
  • Contracts
  • Control Surfaces
  • Control Systems
  • Government Procurement
  • Helicopters
  • Horizontal Stabilizers
  • Instrumentation
  • Rotary Wing Aircraft
  • Stabilization Systems
  • Surfaces
  • Test Vehicles
  • Trailing Edges
  • Vertical Stabilizers

Fields of Study

  • Agricultural and Food sciences

Readers

  • Aerodynamics/Aeronautics.
  • Aerospace Engineering
  • Systems Analysis and Design