Figure 1: [Model C932]


Figure 2: [Model C925]


For the experimental tests wooden models were used, their length was 3.4 meters for the C932 and 3.0 meters for the C925.


The tested configurations and displacements are reported in Table 1. In Tables 2a and 2b main particulars of both models are indicated. Figure 3 shows the sectional area curves of both models for L/1/3 = 4.66.


L/1/3 S/L


4.66; 5.08; 5.74 0.24; 0.27; 0.30; 0.33; 0.36; 0.41; ∞


4.66; 4.92 L/1/3


Fn 0.20.7


0.24; 0.30; 0.36; ∞ 0.20.6 S/L Stagger (%LWL) Fn


4.66; 5.08; 5.74 0.30 6; 10; 20; 30 4.66 0.30 10; 20; 30


Table 1: [Towing tank test program] L/1/3 (catanaran)


L/1/3 (demihull)   CAT


LWL bWL T


CM CB CP


LCB/LWL LWL/bWL bWL/T AT/AM SWCAT


SW/2/3 from stern [m2]


4.66 5.87


[m3] [m]


[m] [m]


0.368 3.341 0.401 0.251 0.808 0.549 0.679 0.427 8.353 1.594 0.520


4.184 8.15


Table 2a: [C932 – Main particulars] B-24 ©2007: Royal Institution of Naval Architects 0.30.5 0.20.6


5.08 6.39


0.284 3.336 0.397 0.207 0.774 0.518 0.670 0.432 8.400 1.918 0.420


3.588 8.30


5.74 7.23


0.194 3.320 0.384 0.161 0.741 0.473 0.638 0.442 8.646 2.385 0.250


2.908 8.68


L/1/3 (catamaran) L/1/3 (demihull)


 CAT LWL bWL T


CM CB CP


LCB/LWL LWL/bWL bWL/T AT/AM SWCAT


SW/2/3 from stern [m2]


[m3] [m]


[m] [m]


4.66 5.87


0.266 3.000 0.393 0.250 0.766 0.451 0.589 0.480 7.634 1.572 0.032


3.308 6.35


Table 2b: [C925 – Main particulars]


0.0 0.2 0.4 0.6 0.8 1.0


A/AMAX


C925 C932


4.92 6.20


0.216 2.954 0.390 0.221 0.743 0.424 0.571 0.500 7.574 1.765 0.0


2.926 6.45


L (m) 0.01.0 2.03.0 Figure 3: [Sectional Area Curves - L/1/3 = 4.66] 3. FACILITIES AND TESTS


All the model experiments were carried out in the towing tank of the Dipartimento di Ingegneria Navale of the


4.0


C925


Staggered C932


C925


Symmetric C932


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