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Full-Text Articles in Social and Behavioral Sciences
The Determination Of G1 And G7 Ballistic Coefficients Of .22lr Caliber Ammunition In Gypsum Board Through Doppler Radar Acquisition, Jose A. Colon Jr.
The Determination Of G1 And G7 Ballistic Coefficients Of .22lr Caliber Ammunition In Gypsum Board Through Doppler Radar Acquisition, Jose A. Colon Jr.
Student Theses
In this experiment, a method of calculating ballistic coefficients of .22LR (long rifle) caliber ammunition was developed using Doppler radar to track the pre-impact and post-impact velocities of projectiles passing through gypsum board. The method demonstrated has distinct advantages in accuracy and flexibility over conventional chronograph projectile tracking that forensic firearm experts should consider when determining the optimal method to obtain a ballistic coefficient (BC). G1 and G7 ballistic coefficients were determined for three .22LR ammunition brands with respective muzzle velocities of approximately 1050ft/s (320m/s), 1230ft/s (375m/s), and 1640ft/s (500m/s) fired from a Ruger 10/22 semi-automatic carbine using an Infinition …
The Relationship Between Impact Energy And Glass Fracture Via .177 Caliber Steel Bbs, Jocenel Beach
The Relationship Between Impact Energy And Glass Fracture Via .177 Caliber Steel Bbs, Jocenel Beach
Student Theses
Fractured glass is often found at shooting scenes and can provide useful information for crime scene reconstruction. Mechanical glass fracture from a projectile impact can result in different types of fracture patterns. The degree of fracture depends on several factors including: type of glass, the thickness of the glass, curvature (if any), distance from the muzzle, contact angle, and type of projectile. Correlating impact energy to the degree of glass fracture can provide useful information regarding the muzzle-to-target distance for a particular firearm/ammunition combination. This research focuses on the projectile impact velocity of .177 steel BBs shot from a pneumatic …