STABILITY AND CONTROL CHARACTERISTICS OF A SMALL-SCALE MODEL OF AN AERIAL VEHICLE SUPPORTED BY TWO DUCTED FANS

Abstract

Tests were made with the ducted fans arranged tandem and side by side. The model was found to be dynamically unstable in roll and pitch in both hovering and forward flight, but this instability could be eliminated by the addition of a sufficient amount of artificial damping. A system of longitudinal vanes just below the duct exists was found to be unsatisfactory as a source of roll-control moment. Less pitchcontrol moment was required for the tandem arrangement than for the side-by-side arrangement at any given forward speed. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1961
Accession Number
AD0260541

Entities

People

  • Lysle P. Parlett

Organizations

  • National Aeronautics and Space Administration

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aircrafts
  • Ducted Fans
  • Fans
  • Flight
  • Hovering
  • Instability
  • Models
  • Scale Models

Readers

  • Aerodynamics/Aeronautics.
  • Aerospace Engineering