Dynamic Model Wind Tunnel Tests of a Variable-Diameter, Telescoping- Blade Rotor System (TRAC Rotor)

Abstract

An analytical and experimental program was conducted to establish feasibility and determine characteristics of the Sikorsky TRAC rotor system, which is a unique variable-diameter, telescoping-blade concept for advanced rotary-wing aircraft. The program included a preliminary design study of a full-scale blade, wind tunnel tests of a dynamically scaled rotor model in various flight modes, and correlation of experimental results with theory. Feasibility was established for the TRAC rotor operating both as a high-speed compound helicopter and as a stopped/stowed rotor configuration. The basic blade structural design and the retraction system were verified with the model, which was scaled for operation at full tip speeds and forward speeds.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1973
Accession Number
AD0771037

Entities

People

  • Edmond F. Kiely
  • Evan A. Fradenburgh
  • Robert J. Murrill

Organizations

  • United Technologies Corporation

Tags

Communities of Interest

  • Air Platforms
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Actuators
  • Aircraft Equipment
  • Aircrafts
  • Airframes
  • Control Systems
  • Data Acquisition
  • Fixed Wing Aircraft
  • Friction
  • Fuselages
  • Mach Number
  • Measurement
  • Resonant Frequency
  • Rotary Wing Aircraft
  • Spars
  • Test And Evaluation
  • Transducers
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Aerodynamics.
  • Aerospace Research.
  • Software Engineering

Technology Areas

  • Space
  • Space - Spacecraft Maneuvers