Performance of Advanced Heavy-Lift, High-Speed Rotorcraft Configurations

Abstract

The aerodynamic performance of rotorcraft designed for heavy-lift and high-speed cruise is examined. Configurations considered include the tiltrotor, the compound helicopter, and the lift-offset rotor. Design conditions are hover and 250-350 knot cruise, at 5k/ISA+20 degrees Celsius (civil) or 4k/95 degrees Fahrenheit (military); with cruise conditions at 4000 or 30,000 ft. The performance was calculated using the comprehensive analysis CAMRAD II, emphasizing rotor optimization and performance, including wing-rotor interference. Aircraft performance was calculated using estimates of the aircraft drag and auxiliary propulsion efficiency. The performance metric is total power, in terms of equivalent aircraft lift-to-drag ratio L/D = WV/P for cruise, and figure of merit for hover.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 2007
Accession Number
ADA519252

Entities

People

  • C. W. Acree Jr.
  • Hyeonsoo Yeo
  • Wayne Johnson

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aerodynamic Configurations
  • Air Transportation
  • Aircraft Design
  • Aircraft Equipment
  • Aircraft Industry
  • Aircrafts
  • Airframes
  • Cost Models
  • Fixed Wing Aircraft
  • Helicopters
  • Horizontal Stabilizers
  • Mach Number
  • Rotary Wing Aircraft
  • Tilt Rotor Aircraft
  • Transport Aircraft
  • Vehicles
  • Vertical Takeoff Aircraft

Fields of Study

  • Physics

Readers

  • Aerospace Engineering