Accession Number:

AD0679134

Title:

AN INVESTIGATION OF THE DYNAMIC STABILITY CHARACTERISTICS OF A QUAD CONFIGURATION, DUCTED-PROPELLER V/STOL MODEL. VOLUME I. PHASE I - HOVERING

Descriptive Note:

Final data rept.

Corporate Author:

PRINCETON UNIV NJ DEPT OF AEROSPACE AND MECHANICAL SCIENCES

Personal Author(s):

• Putman, William F.
• Traybar, Joseph J.
• Curtiss, Jr., Howard C.
• Kukon, John P.

Report Date:

1968-09-01

Pagination or Media Count:

118.0

Abstract:

Results are presented of experiments conducted to measure the dynamic stability characteristics of a quad configuration, ducted-propeller, dynamically similar model, VSTOL aircraft near hover. The data presented include longitudinal and lateral transient response characteristics of the dynamic model. Also included is a comparison with full-scale duct characteristics of the lift, drag, and pitching moment characteristics of an isolated duct from the model. The model employed in the experiments is a generalized research model which was arranged to represent closely the X-22A VSTOL aircraft. The data presented in the report represent the first phase of a three-phase investigation of the dynamic stability of this type of VSTOL aircraft. The other two phases pertain to the longitudinal and lateraldirectional characteristics at four low- speed and high-duct-incidence trim conditions.

Descriptors:

• *RESEARCH AIRCRAFT
• *VERTICAL TAKEOFF AIRCRAFT
• AIRCRAFT MODELS
• DRAG
• HOVERING
• MODEL TESTS
• PITCH(MOTION)
• ROLL
• SHROUDED PROPELLERS
• STABILITY

Subject Categories:

• Aerodynamics
• VSTOL
• Research and Experimental Aircraft
• Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE