Main Dimensions; Propeller Clearance - Man B&W S50ME-B9.3-TII Project Manual

MAN B&W

Main Dimensions

Length between perpendiculars
Length of load water line
Breadth
Draft at forward perpendicular
Draft at aft perpendicular
Displacement
Block coefficient (LPP)
Midship coefficient
Waterplane area coefficient
Wetted surface with appendages
Centre of buoyancy forward of LPP/2
Propeller centre height above baseline
Bulb section area at forward perpendicular
Table 5.18.03: Data sheet for propeller design purposes, in case model test is not available this table should be filled in

Propeller clearance

To reduce pressure impulses and vibrations emit-
ted from the propeller to the hull, MAN Diesel &
Turbo recommends a minimum tip clearance as
shown in Fig. 5.18.04.
For ships with slender aft body and favourable
inflow conditions the lower values can be used,
whereas full afterbody and large variations in
wake field cause the upper values to be used.
In twinscrew ships the blade tip may protrude
below the base line.
X
Fig. 5.18.04: Propeller clearance
MAN B&W 70-26 engines
Symbol
LPP
LWL
B
TF
TA
o
CB
CM
CWL
S
LCB
H
AB
Hub
VBS 600
VBS 660
VBS 720
VBS 790
VBS 860
VBS 940
VBS 1020
VBS 1100
VBS 1180
VBS 1260
VBS 1350
VBS 1460
VBS 1550
VBS 1640
VBS 1730
VBS 1810
VBS 1890
VBS 1970
VBS 2060
Baseline
VBS 2150
178 22 372.0
MAN Diesel
Unit Ballast
m
m
m
m
m
m3



m2
m
m
m2
Dismant-
High-skew Nonskew
ling
propeller propeller
of cap
Y mm
X mm
120
130
140
155
170
185
200
215
230
245
1520% 2025%
of D
265
280
300
320
340
355
370
385
405
425
5.18
Page 3 of 8
Loaded
178 22 970.0
Baseline
clearance
Y mm Z mm
Min.
of D 50100
216 56 93-7.3.1
198 46 953.6