Accession Number:

AD0885860

Title:

The Solution of the Linearized Equations of Motion for Autorotating Bodies - Mass Imbalance and Trim Misalignment Effects.

Descriptive Note:

Final rept. Jan 69-Jul 70,

Corporate Author:

AIR FORCE ARMAMENT LAB EGLIN AFB FL

Personal Author(s):

• Cobb, Kenneth K.

Report Date:

1970-08-01

Pagination or Media Count:

55.0

Abstract:

A closed form solution is presented for the motion of an autorotating body having the geometric center fixed. It is assumed that the spin rate is near terminal and that the angular motion of the spin axis is relatively small. The aerodynamic moments considered are the Magnus moment, the yaw and roll damping moment, and the yawing moment due to sideslip. The perturbing factors included in the equations are the mass imbalance and trim misalignment. The effect of the mass imbalance on the spin axis pitching motion of nearly spherical bomblets is considered in detail. Author

Descriptors:

• *ARMING DEVICES
• *BOMBLETS
• FORCE(MECHANICS)
• AERODYNAMIC CHARACTERISTICS
• EQUATIONS OF MOTION
• MATHEMATICAL MODELS
• YAW
• ROLL
• MOMENT OF INERTIA
• DIFFERENTIAL EQUATIONS
• NUMERICAL ANALYSIS
• SPIN STABILIZED AMMUNITION
• SPIN STABILIZED AMMUNITION

Subject Categories:

• Ammunition and Explosives
• Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE