Development of Cowling for Long-Nose Air-Cooled Engine in the NACA Full-Scale Wind Tunnel

Abstract

An investigation of cowlings for long-nose radial engines was made on the Curtiss XP-42 fighter in the NACA full-scale wind tunnel. The unsatisfactory aerodynamic characteristics of all the cowlings with scoop inlets tested led to the development of the annular high-velocity inlet cowlings. Tests showed that ratio of cooling-air velocity at cowling inlet to stream velocity should not be less than 0.5 for this type of cowling and that critical compressibility speed can be extended to more than 500 mph at 20,000 ft altitude.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1941
Accession Number
ADA800676

Entities

People

  • Abe Silverstein
  • Eugene R. Guryansky

Organizations

  • Langley Research Center

Tags

DTIC Thesaurus Topics

  • Aeronautical Laboratories
  • Air Cooled
  • Air Flow
  • Aircrafts
  • Airplanes
  • Coefficients
  • Control Surfaces
  • Cooling
  • Drag
  • Dynamic Pressure
  • Engines
  • Flow
  • Free Stream
  • Measurement
  • Pressure Gradients
  • Pressure Measurement
  • Wind Tunnels

Readers

  • Aerodynamics/Aeronautics.
  • Combustion and Flow Dynamics.