Rudder and Steering Calculation
Principle Particulars: Formula Values Unit [m] [m] [m] Speed (V) 67.2 11 3.56 0.756 10 5.144 [Km/h] Navigation co
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Principle Particulars:
Formula
Values
Unit [m] [m] [m]
Speed (V)
67.2 11 3.56 0.756 10 5.144
[Km/h]
Navigation coefficient (n) Significant wave height (H)
0.85H
18.5184 0 0
A=c1*c2*c3*c4*1.75*(L*T)/100
4.18656
[m2]
c1=Factor for the ship type c2=factor for the rudder type c3= factor for rudder profile c4=factors for the rudder arrangement
1 1 1
In General In General For NACA Profile
1
Rudder in propeler jet
A=LT/60
3.9872
[m2]
3.99484 98
[m2]
4
[m2]
Length (L) Breadth (B) Draft (T) Block Coefficient (Cb)
Remarks
[kn] ms-1
Rudder area:
L=Leangth T=Draft
A=LT/100 *{1+25(B/L)2} L=Leangth B=Breadth T=Draft Therefore rudder area , A=
Material: Kr=Material factor
Kr=(235/Reh)0.75 ;Reh>235[N/mm2] Kr=235/Reh ;Reh