UFC 4-159-03
3 October 2005
ρw
mass density of water, from Table 4-1
=
Vc = current speed (m/s)
A p = propeller expanded blade area (m2)
propeller drag coefficient = 1.0
C PROP
=
θC
current angle (degrees)
=
A Tpp
A Tpp
=
EQUATION:
(22)
Ap =
1.067 - 0.229 (p / d)
0.838
for an assumed propeller pitch ratio of p / d = 1.0
LwL B
EQUATION:
(23)
A Tpp =
AR
A R is a dimensionless area ratio for propellers. Typical values of this parameter for
major vessel groups are given in Table 4-7.
91