MIL-STD-662F
VL = Velocity loss (over target base line)
Velocity loss is calculated in accordance with the following formula:
VL = (XG
Drel)/C
Where:
X = Distance from baseline to target
G = Drag factor (can be obtained from APG per ITOP 4-2-805, Appendix F).
Drel = Relative air density
C = Ballistic coefficient( per ITOP 4-2-805, Appendix F).
5.6 Ballistic test report. Ballistic test reports shall contain the following minimum information as applicable:
a. Contractor identification. b. Test facility.
c. Contract number.
d. Lot numbers and quantities. e. Item specification number.
f. Armor material description.
g. Material identification number for each test sample. h. Temperature and humidity at the test facility.
i. Date.
j. Personnel conducting test and any witnesses. k. Weapon used.
l. Projectile used.
m. Projectile weight, grains. n. Type of propellant.
o. Weight of propellant for each shot, grains.
p. Impact velocities used in computing V50's with highest partial penetration, lowest complete penetration, range (spread), and velocities of all rounds.
q. Witness plate characteristics, partial or complete. r. Calculated V50BL(P) ballistic limit.
s. Remarks pertinent to the conduct of the test, or behavior of the material.
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