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Aerodynamic and Flight Dynamic Characteristics of 5.56-mm Ammunition: M855.

ADA530895

Publication Date	2010
Personal Author	Silton, S. I.; Howell, B. E.
Page Count	110
Abstract	An experimental program for the aerodynamic and flight dynamic characterization of current 5.56-mm small-caliber ammunition has been developed and executed to further enable the U.S. Army's understanding of the ammunition. This report is focused on the M855 round, one of the most commonly used ammunitions for the M4 and M16A2 weapons. The aerodynamic characterization of the M855 round was accomplished at muzzle velocity as well as simulated downrange velocities out to 600 m. The resulting aerodynamic data will be used to update the U.S. Army's aerodynamic model of M855 ammunition to create improved modeling ability. A flight dynamic characterization, to include yaw limit cycle and Magnus moment instabilities, was accomplished at the same velocities. The predicted downrange yaw limit cycles were compared with previously obtained at-range yaw limit cycles with some success.
Keywords	Ammunition Aerodynamics Moments Flow fields Magnus effect Mach number Instability Muzzle velocity Projectiles Yaw
Source Agency	Non Paid ADAS
NTIS Subject Category	51A - Aerodynamics 79A - Ammunition, Explosives, & Pyrotechnics
Corporate Authors	Army Research Lab., Aberdeen Proving Ground, MD. Weapons and Materials Research Directorate.
Supplemental Notes	The original document contains color images. Prepared in collaboration with Data Matrix Solutions, Inc., Sterling, VA.
Document Type	Technical Report
Title Note	Final rept. Aug 2005-Dec 2006.
NTIS Issue Number	201104

Aerodynamic and Flight Dynamic Characteristics of 5.56-mm Ammunition: M855.

Aerodynamic and Flight Dynamic Characteristics of 5.56-mm Ammunition: M855.
ADA530895

Publication Date	2010
Personal Author	Silton, S. I.; Howell, B. E.
Page Count	110
Abstract	An experimental program for the aerodynamic and flight dynamic characterization of current 5.56-mm small-caliber ammunition has been developed and executed to further enable the U.S. Army's understanding of the ammunition. This report is focused on the M855 round, one of the most commonly used ammunitions for the M4 and M16A2 weapons. The aerodynamic characterization of the M855 round was accomplished at muzzle velocity as well as simulated downrange velocities out to 600 m. The resulting aerodynamic data will be used to update the U.S. Army's aerodynamic model of M855 ammunition to create improved modeling ability. A flight dynamic characterization, to include yaw limit cycle and Magnus moment instabilities, was accomplished at the same velocities. The predicted downrange yaw limit cycles were compared with previously obtained at-range yaw limit cycles with some success.
Keywords	Ammunition Aerodynamics Moments Flow fields Magnus effect Mach number Instability Muzzle velocity Projectiles Yaw
Source Agency	Non Paid ADAS
NTIS Subject Category	51A - Aerodynamics 79A - Ammunition, Explosives, & Pyrotechnics
Corporate Authors	Army Research Lab., Aberdeen Proving Ground, MD. Weapons and Materials Research Directorate.
Supplemental Notes	The original document contains color images. Prepared in collaboration with Data Matrix Solutions, Inc., Sterling, VA.
Document Type	Technical Report
Title Note	Final rept. Aug 2005-Dec 2006.
NTIS Issue Number	201104