INVESTIGATION OF TILTING DUCT AND FAN-WING IN TRANSITION FLIGHT

Abstract

A study of the ducted fan as a lifting device in forward flight, as a tilting duct and as a wing enclosed fan showed that significant changes in lift and power occur when inlet separation occurs; that sizable crossflow exists in the duct in all cases; that an increase in lift and power and a decrease in drag occur with forward speed after inlet separation is established which cannot be accounted for by momentum considerations alone. In the case of the fan-wing, the lift curve slope and stability derivative are not changed by the fan operation. A comparison of an articulated and a rigid rotor does not show significant changes in total pitching moments. Comparatively less lifting power is required under similar conditions for the fan-wing than for the tilting duct. Additional force, velocity and pressure data are presented.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1960
Accession Number
AD0254847

Entities

People

  • Jean F. Duvivier
  • Robert B. Mc Callum

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Aerodynamic Characteristics
  • Aircrafts
  • Ducted Fans
  • Fan Blades
  • Fans
  • Flow
  • Geometry
  • Instrumentation
  • Measurement
  • Pressure Distribution
  • Pressure Measurement
  • Ring Wings
  • Shrouded Propellers
  • Slip Rings
  • Static Tests
  • Transportation
  • Wind Tunnels

Readers

  • Aerodynamics.
  • Aerospace Engineering