Critical Speeds and Profile of the Inboard Sections of a Conventional Propeller

Abstract

Tests were conducted with 10-ft., 3-in., diametere propeller in a 8 ft. high-speed wind tunnel. Full-scale wooden propeller blade were constructed with blade twist removed so all sections operate approximately from common zero-lift position. Section critical speeds, profile drags, and section normal-force coefficients are computed. Adverse compressibility effects are expected on shank and hub sections at speeds of approximately 400 mph with subsequent detrimental effects on propulsive efficiency. Suitable fairings to delay compressibility shock formation on these sections are desirable.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1941
Accession Number
ADA800592

Entities

People

  • Arvo A. Lucma

Organizations

  • Langley Research Center

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aeronautics
  • Aircrafts
  • Airplanes
  • Boundary Layer
  • Coefficients
  • Efficiency
  • Fluid Dynamics
  • Fluid Mechanics
  • Mach Number
  • Mechanical Properties
  • Mechanics
  • Pressure Distribution
  • Pressure Measurement
  • Propeller Blades
  • Reynolds Number
  • Static Pressure
  • Wind Tunnels

Fields of Study

  • Physics

Readers

  • Aerodynamics/Aeronautics.
  • Aerospace Engineering