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RUDDER
TORQUE CALCULATIONS (SPADE RUDDER )
Ship speed
knots
Shaft Horsepower
shp
Propeller Diameter
m
Performance Coefficient
Thrust Deduction Factor
Wake Fraction
Rudder Angle
degree
Rudder Dimensions
X1
m
X2
X2
m
X3
X3
m
X4
X4
m
X5
X5
m
X8
X8
m
X9
X9
m
Rudder Stock Bearing Coefficient
U1
U2
D1
D2
Data Uncorrected for taper ratio
Lift coefficient
Cl
See figure 1a & 1b in help
Drag Coefficient
Cd
See figure 2a & 2b in help
Center of Pressure
Cp
See figure 3a & 3b in help
RESULTS
Propeller Thrust
lb
Speed of Advance
fps
Dynamic Pressure
psf
Taper Ratio
Mean Chord
m
Sweep Angle
deg
Effective Aspect Ratio
Lift Coefficient Correction
Corrected Lift Coefficient
Drag Coeeficient Correction
Corrected Drag Coefficient
CN1
CN2
CMC
Corrected Center of Pressure
Normal Force
lb
Hydrodynamτc Torque
lbinc
Rudderstock bearing Friction
lbinc
Rudder Torque Displacing
lbinc
RUDDER TORQUE
lbinc
kgm
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