Test case 3a.3: Static drift

Conditions

• Towing condition in still water
• Pitch, heave, and roll free
• Without rudders
• With bilge keels

[-]	[-]	[m/s]	[deg]
0.280	4.643´10^6	1.531	-10.0

Items and Remarks

Items	Remarks
Integral variables: Non-dimensionalized coefficients of X-force () Y-force () Yaw moment () and Uncertainty analysis (, , ) Ship motion data: Heave [m] Pitch [m] Roll [deg]	Experimental results are available

• Coordinate system for comparision is fixed at midship on the undisturbed waterplane.
• ,

where, is towing carriage speed, is the gravitational acceleration and is the kinematic viscosity of water.

• All quantities are non-dimensionalized with water density (), ship speed (), lateral underwater area (), and the length between perpendiculars ().

, ,