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3.1 Resistance
The results of CMT are shown in Fig. 4. Furthermore, Fig. 5 shows the increased resistance due to the angular velocity of yawing. From these results, the increasing resistance due to outriggers can be observed, but the influence of the distance between outriggers is rather slight.
Fig.4 |
Non-dimensional resistance acting on the outrigger craft. |
Fig.5 |
Increased resistances due to the angular velocity of yawing. |
3.2 Lateral Forces and Yaw Moments
The results of the oblique tests on type-H, type-A and type-C are shown in Fig. 6 and Fig. 7. The hydrodynamic forces and moments on the craft have, a non-linear effect in a large range of drift angles (β) . In order to investigate the influence of the angular velocity of yawing, the hydrodynamic forces and moments are shown in Fig. 8 and Fig. 9.
Hydrodynamic forces and moments due to pure yaw motions have a linear effect within the range of 0.4 (r'= 0.4).
Fig.6 |
Lateral forces of the outrigger craft due to oblique motions. |
Fig.7 |
Yaw moments of the outrigger craft due to oblique motions. |
Fig.8 |
Lateral forces of outrigger craft due to pure turning motions. |
Fig.9 |
Yaw moments of outrigger craft due to pure turning motions. |
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