Wind-Tunnel Investigation of the NACA 23012 Airfoil with Two Sizes of Balanced Split Flap

Abstract

Investigation was made to determine the aerodynamic section characteristics of NACA 23012 airfoil as affected by size, nose location and deflection of flaps. The optimum arrangement of either of balanced split flaps was a combination comparable to Fowler flap. The 0.25-c balanced split gave higher maximum coefficients and lower profile-drag coefficients for take-off than best 0.2566-c slotted flap. Characteristics of 0.25-c balanced split flap were superior to a Fowler flap combination with a flap of small camber previously tested.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1940
Accession Number
ADA801133

Entities

People

  • Paul E. Purser
  • T. A. Harris

Organizations

  • Langley Research Center

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aerodynamic Characteristics
  • Aeronautical Laboratories
  • Aircrafts
  • Airfoils
  • Coefficients
  • Deflection
  • Drag
  • Flaps (Control Surfaces)
  • Measurement
  • Planimetry
  • Pressure Distribution
  • Slotted Flaps
  • Split Flaps
  • Trailing Edges
  • Wind Tunnels
  • Wing Flaps

Fields of Study

  • Physics

Readers

  • Aerodynamics/Aeronautics.