STABILITY AND CONTROL CHARACTERISTICS OF A MODEL OF AN AERIAL VEHICLE SUPPORTED BY FOUR DUCTED FANS
Abstract
Tests were made in both hovering and forward flight with a model having four ducted fans which provided the sole source of lift and propulsion. The ducts were arranged in a rectangular pattern and were fixed with respect to the airframe so that their axes of revolution were vertical for hovering flight. In hovering flight the model had unstable oscillations in pitch and roll which could be completely stabilized by the use of artificial damping. In forward flight, the tilt angle and pitching moment required for trim were undesirably large. Both of these quantities were reduced when a cascade of turning vanes was used beneath the forward ducts, but the power penalty imposed by the vanes was large. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1961
- Accession Number
- AD0262310
Entities
People
- Lysle P. Parlett
Organizations
- National Aeronautics and Space Administration