A New Approach to the Calculation of the Effect of the Ground on the Performance of Rotary Wing Aircraft,

Abstract

An investigation of the helicopter ground effect prediction methodology was made and evaluated. Prediction of IGE performance for single rotor helicopters of a conventional type at z/D's greater than .4 can be attained with a resonable degree of accuracy through the use of empirical curves which consider rotor geometry only. Improved accuracy can be attained by use of the new method developed for this investigation which gives results that reflect changes in fuselage shape as well as rotor geometry. While insufficient data was available, the new method appears to provide a means of predicting ground effect for compound type vehicle that entail significant configuration changes. (Author)

Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1971
Accession Number
AD0736925

Entities

People

  • Eugene M. Newman

Organizations

  • Naval Air Systems Command

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Accuracy
  • Aircrafts
  • Airframes
  • Fixed Wing Aircraft
  • Fuselages
  • Geometry
  • Ground Effect
  • Helicopters
  • Rotary Wing Aircraft
  • Vehicles

Fields of Study

  • Physics

Readers

  • Aerospace Engineering
  • Computational Modeling and Simulation