The S415 and S418 Airfoils

Abstract

Two, 14.1-percent-thick, natural-laminar-flow airfoils, the S415 and S418, intended for the blade of a slowed-rotor helicopter have been designed and analyzed theoretically. The S415 airfoil, designed for the hover condition, is "unmorphed" into the S418 airfoil, which is more suitable for forward flight. The two primary objectives of high maximum lift and low profile drag have been achieved. The constraints on the pitching moments have been satisfied.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 2010
Accession Number
ADA545823

Entities

People

  • Dan M. Somers

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Abstracts
  • Boundaries
  • Boundary Layer
  • Boundary Layer Transition
  • Flow
  • Helicopters
  • Laminar Flow
  • Leading Edges
  • Low Drag
  • Mach Number
  • Pressure Distribution
  • Pressure Gradients
  • Reynolds Number
  • Thickness
  • Trailing Edges
  • Turbulent Flow
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Aerodynamics/Aeronautics.
  • Aerospace Engineering