"NavCad Report" Page 1 of 6
REPLACE_COMPANY_NAME_HERE 21 Mar 2018 02:10 PM Page 1
Monohull/Propulsion Project: 5K.nc5
30k
Propulsive coefficients
Wake fraction [Calc] Holtrop 1984 Wake fract scale correction [Off]
Thrust deduction [Calc] Holtrop 1984 Rudder loc Behind prop
Relative rotative efficiency [Calc] Holtrop 1984 Wake fract duct correction [Off]
Friction line ITTC Tunnel stern correction [Off]
Correlation allowance 0.00042 Tunnel Diam 0 [m]
3D form factor 1.3881 Tunnel depth 0 [m]
System analysis
Analysis type Free run Water type Standard Salt
Cav criteria Keller eqn Mass density 1025.86 [kg/m3]
CPP method [Off] Kinematic viscosity 1.1883e-06 [m2/s]
Engine RPM 0
Prediction results
Vel [kts] Rtotal [kN] WakeFr ThrDed RelRot EngRPM PropRPM
6.00 46.88 0.5170 0.2371 1.0115 93.6 93.6
7.00 62.63 0.5150 0.2371 1.0115 108.6 108.6
8.00 80.79 0.5132 0.2371 1.0115 123.6 123.6
8.50 90.99 0.5125 0.2371 1.0115 131.3 131.3
9.00 102.19 0.5117 0.2371 1.0115 139.2 139.2
9.50 114.68 0.5111 0.2371 1.0115 147.4 147.4
10.00 128.86 0.5105 0.2371 1.0115 156.0 156.0
11.00 164.51 0.5093 0.2371 1.0115 175.1 175.1
12.00 214.84 0.5083 0.2371 1.0115 197.9 197.9
13.00 287.99 0.5074 0.2371 1.0115 225.7 225.7
Vel [kts] PropRn J Kt Kq PropEff HullEff OPC
6.00 1.22e+7 0.2575 0.1299 0.0126 0.4229 1.5796 0.6622
7.00 1.42e+7 0.2601 0.1290 0.0125 0.4277 1.5728 0.6669
8.00 1.61e+7 0.2620 0.1283 0.0124 0.4314 1.5672 0.6703
8.50 1.71e+7 0.2626 0.1282 0.0124 0.4327 1.5648 0.6712
9.00 1.82e+7 0.2627 0.1281 0.0124 0.4334 1.5625 0.6713
9.50 1.92e+7 0.2622 0.1283 0.0124 0.4335 1.5603 0.6704
10.00 2.03e+7 0.2612 0.1287 0.0124 0.4326 1.5584 0.6683
11.00 2.28e+7 0.2565 0.1303 0.0124 0.4275 1.5547 0.6589
12.00 2.58e+7 0.2481 0.1332 0.0126 0.4173 1.5515 0.6419
13.00 2.94e+7 0.2361 0.1373 0.0128 0.4018 1.5486 0.6169
Vel [kts] Thr/prop [kN] DelThr [kN]PropTorq [Nm] PD/prop [hp] PS/prop [hp] PB/prop [hp]PBtotal [hp]
6.00 61.48 46.90 22104 287 293 302 302
7.00 82.12 62.65 29489 445 454 468 468
8.00 105.94 80.82 37989 652 665 686 686
8.50 119.32 91.02 42747 779 795 820 820
9.00 134.00 102.23 47949 927 945 975 975
9.50 150.37 114.72 53719 1099 1121 1156 1156
10.00 168.95 128.89 60226 1304 1331 1372 1372
11.00 215.70 164.55 76400 1857 1895 1954 1954
12.00 281.70 214.90 98863 2716 2772 2857 2857
13.00 377.59 288.06 130996 4104 4188 4317 4317
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"NavCad Report" Page 2 of 6
Vel [kts] Fuel/eng [lph] Sigma MinP/D TipSpd [mps] %Cav Press [kPa] MinEAR
6.00 46.01 117.79 0.444 18.2 2.6 10.3 0.2832
7.00 71.17 85.80 0.445 21.1 2.2 13.8 0.3111
8.00 104.38 65.22 0.445 24.0 1.8 17.8 0.3433
8.50 124.89 57.59 0.446 25.5 1.6 20.1 0.3614
9.00 148.66 51.22 0.446 27.0 1.4 22.5 0.3813
9.50 176.51 45.85 0.446 28.6 1.3 25.3 0.4034
10.00 209.63 41.27 0.445 30.3 1.2 28.4 0.4286
11.00 297.98 33.95 0.444 34.0 1.3 36.3 0.4918
12.00 *** 28.41 0.441 38.4 2.3 47.4 0.5811
13.00 *** 24.12 0.436 43.8 5.2 63.5 0.7108
Report ID20180321-1410 HydroComp NavCad 5.05.0086.NC31.S666
file:///C:/Program%20Files%20(x86)/HydroComp/NavCad/Untitled1.htm 3/21/2018
"NavCad Report" Page 3 of 6
REPLACE_COMPANY_NAME_HERE 21 Mar 2018 02:10 PM Page 2
Monohull/Propulsion Project: 5K.nc5
30k
Blade impulse pressure
Wake peak 0.000 Hub to hull 0.700 [m]
Supplemental results
Vel [kts] Wpeak Impulse [kPa]
6.00 0.000 0.00
7.00 0.000 0.00
8.00 0.000 0.00
8.50 0.000 0.00
9.00 0.000 0.00
9.50 0.000 0.00
10.00 0.000 0.00
11.00 0.000 0.00
12.00 0.000 0.00
13.00 0.000 0.00
Report ID20180321-1410 HydroComp NavCad 5.05.0086.NC31.S666
file:///C:/Program%20Files%20(x86)/HydroComp/NavCad/Untitled1.htm 3/21/2018
"NavCad Report" Page 4 of 6
REPLACE_COMPANY_NAME_HERE 21 Mar 2018 02:10 PM Page 3
Monohull/Propulsion Project: 5K.nc5
30k
Propulsor data
Description 5Kdwt
Series B-series Scale corr B-series
Blades 4 Kt mult [std] 1.000
Exp area ratio 0.550 Kq mult [std] 1.000
Diameter 3.710 [m] Blade T/C [std] 0.000
Pitch 1.902 [m] Roughness [std] 0 [mm]
Pitch type FPP Cav breakdown [Apply]
Propeller cup 0 [mm]
Engine data
Engine file AKASAKA.eng Gear ratio 1.000
Gear efficiency 0.97 Shaft efficiency 0.980
Hull data
General: Ct-based:
Length between PP 96.000 [m] Max section area 133.000 [m2]
WL bow pt aft FP 1.522 [m] Waterplane area 1870.000 [m2]
Length on WL 97.522 [m] Trim by stern 0.300 [m]
Max beam on WL 21.500 [m] LCB aft of FP 46.060 [m]
Max molded draft 6.200 [m] Bulb ext fwd FP 0.000 [m]
Displacement bare 10584.000 [t] Bulb area at FP 7.600 [m2]
Wetted surface 2733.000 [m2] Bulb ctr above BL 4.750 [m]
Chine type Round bilge Transom area 0.000 [m2]
Transom beam 0.000 [m]
Parameters: Transom draft 0.000 [m]
Lwl/B 4.5359 Half ent angle 55.000 [deg]
B/T 3.4677 Bow shape U-shape [vert]
Cb 0.7937 Stern shape U-shape [vert]
Cws 2.7246
Cx 0.9977
Cw 0.8919
LCB/Lpp 0.4798
At/Ax 0.0000
Bt/Bx 0.0000
Tt/T 0.0000
Wake fract: Holtrop 1984
Fn(Lwl) 0.1...0.8 0.10
Fn-high 0.1...0.8 0.22
Lwl/Bwl 3.9...14.9 4.54
Bwl/T 2.1...4 3.47
Cp(Lwl) 0.55...0.85 0.80
Lambda 0...0.99 1.01 Limit
Thrust ded: Holtrop 1984
Fn(Lwl) 0.1...0.8 0.10
Fn-high 0.1...0.8 0.22
Lwl/Bwl 3.9...14.9 4.54
Bwl/T 2.1...4 3.47
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"NavCad Report" Page 5 of 6
Cp(Lwl) 0.55...0.85 0.80
Lambda 0...0.99 1.01 Limit
Rel rot eff: Holtrop 1984
Fn(Lwl) 0.1...0.8 0.10
Fn-high 0.1...0.8 0.22
Lwl/Bwl 3.9...14.9 4.54
Bwl/T 2.1...4 3.47
Cp(Lwl) 0.55...0.85 0.80
Lambda 0...0.99 1.01 Limit
Report ID20180321-1410 HydroComp NavCad 5.05.0086.NC31.S666
file:///C:/Program%20Files%20(x86)/HydroComp/NavCad/Untitled1.htm 3/21/2018
"NavCad Report" Page 6 of 6
REPLACE_COMPANY_NAME_HERE 21 Mar 2018 02:10 PM Page 4
Monohull/Propulsion Project: 5K.nc5
30k
Symbols and values
Vel = Ship speed
Rtotal = Total vessel resistance
WakeFr = Taylor wake fraction coefficient
ThrDed = Thrust deduction coefficient
RelRot = Relative-rotative efficiency
VelAdv = Advance velocity = (1 - WakeFr) * Vel
EngRPM = Engine RPM
PropRPM = Propeller RPM
PropRn = Propeller Reynolds number
J = Advance coefficient
Kt = Thrust coefficient
Kq = Torque coefficient
PropEff = Propeller open-water efficiency
HullEff = Hull efficiency = (1 - ThrDed) / (1 - WakeFr)
OPC = Overall propulsive coefficient
Thr/prop = Open-water thrust per propeller
DelThr = Total delivered thrust
PropTorq = Propeller open water torque
PD/prop = Delivered power per propeller
PS/prop = Shaft power per propeller
PStotal = Total shaft power
PB/prop = Brake power per propeller
PBtotal = Total brake power
Fuel/eng = Fuel consumption per engine
Towpull = Total tow pull
Sigma = Cavitation number based on advance velocity
MinP/D = Minimum P/D ratio to avoid face cavitation
TipSpd = Linear velocity of the propeller tips
%Cav = Percent back cavitation
Press = Average propeller blade pressure
MinEAR = Minimum expanded area ratio
Wpeak = Peak wake fraction
Impulse = Blade impulse pressure
* = Exceeds speed parameter
Report ID20180321-1410 HydroComp NavCad 5.05.0086.NC31.S666
file:///C:/Program%20Files%20(x86)/HydroComp/NavCad/Untitled1.htm 3/21/2018
