Dataset: ballistic1.dat

Source: R.A. Prosser, S.H. Cohen, and R.A. Segars (2000). "Heat as a Factor 
of Cloth Ballistic Panels by 0.22 Caliber Projectiles," Textile Research
Journal, Vol. 70: pp. 709-723.

Description: Experiments measuring V50 (velocity at which approximately
half the projectiles within a specified (narrow) striking velocity range
penetrate the panel, in meters/second).

Model fit:  V50^2 = a + b*panels, seperately by bullet type (round, sharp,
FSP). Note: appears to be a typo on the rounded regression of Table II, p. 717
and on last recorded observation in Table I.

Variables / Columns
Bullet Type   8 /* 1=Rounded, 2=Sharp, 3=FSP  */
Number of layers in panel  15-16
V50  (m/s)   20-24
sharp indicator   32
FSP indicator    40