Soft In-Plane Matched-Stiffness/Flexure-Root-Blade Rotor System Summary Report

Abstract

A flight research program was conducted to explore feasibility and operating characteristics of a matched-stiffness rigid rotor which was designed to have sufficient torsional flexibility to eliminate the need for feathering bearings. The desired stiffness characteristics involved the use of low in-plane stiffness. An analytical and experimental research program was conducted in which the test rotor was flown on an XH-51A helicopter. The report discusses design, analysis, ground testing, and flight testing aspects of the program. The report also includes a review of features that make a matched-stiffness rotor attractive.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1969
Accession Number
AD0863063

Entities

People

  • Salvatore V. Cardinale

Organizations

  • Lockheed Martin

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aircrafts
  • Airfoils
  • Airframes
  • Center Of Gravity
  • Control Systems
  • Flight Testing
  • Geometry
  • Helicopters
  • Hydraulic Jacks
  • Measurement
  • Mechanics
  • Plastic Explosives
  • Resonant Frequency
  • Stabilization Systems
  • Stiffness
  • Test And Evaluation
  • Vehicles

Fields of Study

  • Engineering

Readers

  • Aerodynamics.
  • Space Exploration and Orbital Mechanics.
  • Systems Analysis and Design