Prediction of Steering and Manoeuvring of Ships 



Table 3 (Cont'd) 



Drift 



Angle* 



(deg) 



9.5e 

 f 



7.0e 

 f 



4.5e 

 f 



2.0e 

 f 



l.Oe 

 f 



0.5e 

 f 



O.Oe 



f 



-0.5e 

 f 



-l.Oe 

 f 



-2.0e 

 f 



-4.5e 

 f 



-7.0e 

 f 



-9.5e 

 f 



Nondimensional Moment, NX 10 



Rudder Angle in deg: 



-40.0 



0.983 

 0.976 



0.842 

 0.867 



0.751 

 0.747 



0.654 

 0.625 



0.605 

 0.578 



0.581 

 0.555 



0.541 

 0.532 



0.525 

 0.510 



0.483 

 0.488 



0.453 

 0.447 



0.379 

 0.359 



0.344 

 0.299 



0.303 

 0.274 



-30.0 



1.013 

 0.984 



0.852 

 0.884 



0.715 

 0.771 



0.609 

 0.652 



0.586 

 0.605 



0.553 

 0.582 



0.515 

 0.559 



0.505 

 0.536 



0.489 

 0.514 



0.449 

 0.472 



0.407 

 0.378 



0.353 

 0.309 



0.288 

 0.273 



■20.0 



0.846 

 0.860 



0.744 

 0.770 



0.649 

 0.663 



0.539 

 0.547 



0.497 

 0.501 



0.485 

 0.478 



0.443 

 0.455 



0.432 

 0.432 



0.396 

 0.409 



0.345 

 0.366 



0.306 

 0.267 



0.268 

 0.190 



0.215 

 0.142 



■10.0 



0.614 

 0.647 



0.532 

 0.567 



0.452 

 0.467 



0.348 

 0.355 



0.311 

 0.309 



0.273 

 0.286 



0.249 

 0.263 



0.235 

 0.240 



0.198 

 0.218 



0.134 

 0.173 



0.059 

 0.070 



-0.011 

 -0.015 



-0.088 

 -0.074 



0.0 



0.363 

 0.390 



0.298 

 0.320 



0.233 

 0.227 



0.146 

 0.120 



0.103 

 0.074 



0.073 

 0.051 



0.037 

 0.028 



0.029 

 0.005 



-0.004 

 -0.018 



-0.074 

 -0.063 



-0.170 

 -0.171 



-0.268 

 -0.263 



-0.345 

 -0.333 



10.0 



0.125 

 0.131 



0.064 

 0.072 



0.006 

 -0.013 



-0.076 

 -0.117 



-0.124 

 -0.161 



-0.140 

 -0.184 



-0.177 

 -0.207 



-0.199 

 -0.230 



-0.231 

 -0.253 



-0.299 

 -0.299 



-0.415 

 -0.411 



-0.524 

 -0.510 



-0.620 

 -0.591 



20.0 



-0.099 

 -0.086 



-0.137 

 -0.134 



-0.200 

 -0.211 



-0.289 

 -0.309 



-0.335 

 -0.353 



-0.363 

 -0.375 



-0.398 

 -0.398 



-0.426 

 -0.421 



-0.449 

 -0.444 



-0.528 

 -0.491 



-0.637 

 -0.606 



-0.749 

 -0.713 



-0.859 

 -0.803 



30.0 



-0.129 

 ■0.216 



-0.201 

 -0.253 



-0.314 

 -0.322 



-0.409 

 -0.415 



-0.463 

 -0.458 



-0.506 

 -0.480 



-0.543 

 -0.502 



-0.579 

 -0.525 



-0.593 

 -0.548 



-0.651 

 -0.595 



-0.757 

 -0.714 



-0.864 

 -0.828 



-0.979 

 -0.928 



40.0 



■0.164 

 ■0.217 



-0.217 

 -0.242 



-0.274 

 -0.302 



-0.395 

 -0.390 



-0.414 

 -0.432 



-0.444 

 -0.453 



-0.465 

 -0.475 



-0.512 

 -0.498 



-0.519 

 -0.521 



-0.586 

 -0.569 



-0.667 

 -0.691 



-0.773 

 -0.810 



-0.871 

 -0.920 



rms 



0.041 

 0.030 

 0.025 

 0.026 

 0.022 

 0.025 

 0.025 

 0.027 

 0.022 

 0.030 

 0.028 

 0.042 

 0.044 



rms 0.024 0.035 0.035 



0.021 



0.019 



0.027 



0.026 



0.047 



0.028 



0.029 



Fairing Polynomial t 

 NxlO^ = -t- 2.83 - 263. 5Xv 

 - 138. 8xs 



+ 1636X v'3 - 489.0xv'2s -i- 12.54X v'h^ + 136. 7x h^ 



'e - experimental points 



f - faired points 



rms = root mean square of differences. 



tv' = nondimensional sway velocity 

 S = rudder angle in radians. 



355 



