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Ballistics, 2nd Edition
book

Ballistics, 2nd Edition

by Donald E. Carlucci, Sidney S. Jacobson
August 2013
Intermediate to advanced content levelIntermediate to advanced
608 pages
21h 36m
English
CRC Press
Content preview from Ballistics, 2nd Edition
177Weapon Design Practice
Note here that F
P
only acts on the bore diameter, whereas F
R
acts on the breech face diam-
eter, normally larger than the bore. The resistance pressure is estimated as follows:
For smooth bores: 0.01
For rifled bores: (tan )
R
FF
F
P
P
r
r
≈+
µα
T
F
(5.18)
The riing force is
F
k
d
F
T
2
P
/2
tan =
α
(5.19)
where
k is the projectile’s radius of gyration (I
zz
= wk
2
in terms of axial moment of inertia and
mass)
μ is the coefcient of friction, and α is the riing angle
Our object is to nd F
P
.
From the Lagrange approximation for the pressure gradient we know that
pp
c
w
BS
1
2
=+
(5.20)
In terms of forces, this may be written as
FF
wc
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Publisher Resources

ISBN: 9781466564374