Chapter 5. BALLISTIC DESIGN AND ANALYSIS

CHAPTER 5

BALLISTIC DESIGN AND ANALYSIS

Section I. BALLISTIC DESIGN

49. General. a. The interior ballistics of propellant actuated devices can be described by the following equations:

Where:

m = propelled mass

v = instantaneous velocity of mass

t = time

P = instantaneous pressure

A = piston (or tube) area

a = launch angle gravitational field factor

g = acceleration of gravity

w = propellant web

B = burning rate constant

n = burning rate exponent (Burning Rate Equation), or number of moles of pro-

pellant gas (Equation of State)

V = internal volume of device

F = propellant impetus

N = weight of gas produced

γ = ratio of specific heats

s = travel

H(t) = dissipated energy including heat loss and gas leakage

R = universal gas constant

T = instantaneous gas temperature