Accession Number:

AD0744444

Title:

Subsonic Aerodynamic Stabilization of Long, Low-Drag Bodies of Revolution Using Boattail Fins

Descriptive Note:

Technical rept.

Corporate Author:

PICATINNY ARSENAL DOVER NJ

Personal Author(s):

• Kline, Roy W.

Report Date:

1972-06-01

Pagination or Media Count:

68.0

Abstract:

Subsonic three-degree-of-freedom wind tunnel tests were utilized to demonstrate the dynamic instability of a five and one half caliber long, spin stabilized body of revolution. A modification of this body, i.e., the addition of fins to the boattail section, is shown to be an effective means of controlling this instability. The optically acquired angular orientation data was fitted to a closed form solution of the differential equations of motion. The pitching, damping, and Magnus moments were evaluated as both linear and nonlinear functions of angle of attack. The airflow over the model was observed by means of smokeflow photography.

Descriptors:

• *EXTERIOR BALLISTICS
• *FIN STABILIZED AMMUNITION
• PITCH(MOTION)
• ANGLE OF ATTACK
• MODEL TESTS
• SUBSONIC CHARACTERISTICS
• FINS
• FORCE(MECHANICS)
• WIND TUNNEL MODELS
• MAGNUS EFFECT

Subject Categories:

• Ammunition and Explosives
• Ballistics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE