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8 Types of Resistance - Coggle Diagram
8 Types of Resistance
Eddy Resistance
Due to turbulence
Aft of structures
Cause low pressure
Drag
Frictional Resistance
Boundary Layer
Close to hull
particles same velocity of hull
\( Rf=fSV^{1.83}\)
f - Coefficient of Friciton
S - Total Wetted Area
V - velocity
Appendage Resistance
Proportional to wetted suface
of appendage
Propostional to \( vˆ2 \)
Air and Wind Resistance
Air Resistance
1,5 to 3% :
Total water resistance
Wind
Might be high resistance
Squat
high speed
Sinks
Ship-length aprox 1,2
bow rises
stern sinks
Increases resistance
Shallow Water Effect
Longer wave length
Squat occurs
lower speeds
Wave Resistance
Rough Water