Page 552 - Practical Design Ships and Floating Structures

527

RESISTANCE I

,
=

FAIRING. NS>(Nv. KW MQFV

AT NO VWMS, VACUUM.
w, PDV, NS
SHIP-:
NO STEERING. NO mmffi,
cLEANHuLL.mREcTospLAc~
~3:coRREcTK)NMR~
AT NO WAMS, VKUlM
NO STEERING, NO mmrs
os-
coRRH=T
CLEAN
HULL,
LOAD FACTOR : TAUPA = TAW- mid-
M
.
NA
TAUPA
:
iNTERwlAnoN
>
KQA

MODELSHIP CoRRELATloN : REslsTANcETEST
SELFPROP. TEST
PROPELLER O.W. TEST
Figure 1: Flowchart of speed trial analysis

For the effect of propeller surface roughness, propeller open-water characteristics are corrected
according to the formula as equation 4 which is derived from the propeller scale effect correction
formula of 1978 I?TC Performance Prediction Method.

Pc
K, =KO, + ACD 0.3 -- 2
DD
C
KpsR = K, - ACD 0.25 - 2 (4)
D