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
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
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