Effect on Helicopter Performance of Modfiications in Profile-Drag Characteristics of Rotor-Blade Airfoil Sections

Abstract

Rough conventional, smooth conventional, and laminar-flow or low-drag sections were tested. The items covered are rotor thrust for fixed power in hovering, range and endurance at cruising speed, and power required at high-forward speed. Calculations indicated that a smooth conventional section gives marked performance gains. Smaller gains are obtainable by using a low-drag section. At high speeds or loads the low-drag section is inferior to the smooth conventional section.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1944
Accession Number
ADA800614

Entities

People

  • F. B. Gustafson

Organizations

  • Langley Research Center

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aeronautical Laboratories
  • Aeronautics
  • Airfoils
  • Blade Airfoils
  • Flight
  • Flow
  • Fluid Dynamics
  • Helicopter Rotors
  • Helicopters
  • High Angles
  • Hovering
  • Laminar Flow
  • Low Drag
  • Low Drag Airfoils
  • Mach Number
  • Reynolds Number

Readers

  • Aerodynamics.
  • Aerodynamics/Aeronautics.