Accession Number:

AD0260541

Title:

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

Descriptive Note:

Corporate Author:

NATIONAL AERONAUTICS AND SPACE ADMINISTRATION WASHINGTON D C

Personal Author(s):

Report Date:

1961-07-01

Pagination or Media Count:

1.0

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

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE