Ballistic Gelatin by Oscar Santos MEEN 3344
Ballistic Gelatin • Solution of gelatin powder in water • Closely simulates density and viscosity of human and animal muscle tissue • Used as a standardized medium for testing the terminal performance of firearms ammunition • Careful control of the properties of this material allows consistent and reliable comparison of terminal ballistics
Composition • Gelatin = 250A Bloom Gelatin or Pharmagel • Most commonly used formula: "10% ballistic gelatin" • Prepared by dissolving 1 part by mass of the 250A bloom gelatin into 9 parts of warm distilled water, mixing the solution while pouring in the powdered gelatin. • Let it stand for 5 hrs or chilled to 4° C • An older formula used by NATO among others specifies a 20% solution, chilled to 10° C, but that solution costs more to prepare as it uses twice the amount of gelatin.
Ballistics Test • Preferred medium for comparing the terminal performance of different expanding ammunition - hollow point bullets - soft point bullets • These bullets use the hydraulic pressure of the gelatin to expand in diameter, limiting penetration and increasing the tissue damage along their path. • Bullets intended for hunting are also commonly tested in ballistic gelatin.
Other Uses • Ballistics – Testing of Bullets - Comparing the depth of penetration in gelatin of a given bullet at different velocities for impact velocity determination - Muzzle distance of bullet to determine distance of travel before impact - Determine the distance of the shooter. • Wound Recreation – Caused by firearms or explosives • Lethality of objects at terminal velocity and highway speeds • Electrocution – pharmagel provides a reasonable analogue to the conductance and resistance of human tissue
References • http://images.google.com/imgres?imgurl=http://www.bismuth-notox.com/redhzrdblt.gif&imgrefurl=http://www.bismuth-notox.com/redhzrd.html&h=138&w=132&sz=7&hl=en&start=30&tbnid=BlgrcjyMIJcyMM:&tbnh=93&tbnw=89&prev=/images%3Fq%3Dballistic%2Bgelatin%26start%3D18%26ndsp%3D18%26svnum%3D10%26hl%3Den%26lr%3D%26sa%3DN • http://www.myscienceproject.org/shotgun/gel_05.jpg • http://www.m5industries.com/html/mythbusters17.htm • http://rumkin.com/reference/firearms/ballistic_gel.php • http://www.theoutdoorquest.com/perma-gel_ballistic_gelatin.htm • http://en.wikipedia.org/wiki/Ballistic_gelatin