10 12 14 16
0 2 4 6 8
For the CR ×103 L/1/3 = 4.66 EXP. DATA
higher values of
stagger, the asymmetric
configurations present lower running trim angles than the corresponding symmetric catamarans. It is due to the reduced wave pattern and the increased moment to trim.
L/1/3 = 5.74
0.25 0.30 0.35 0.40 0.45 0.50 0.55 Fn
Figure 25: [C 932 – Stagger 10 % LWL]
10 12 14 16
0 2 4 6 8
CR ×103 EXP. DATA L/1/3 = 4.66 L/1/3 = 5.08 L/1/3 = 5.74
0.25 0.30 0.35 0.40 0.45 0.50 0.55 Fn
Figure 26: [C 932 – Stagger 20 % LWL]
10 12 14
0 2 4 6 8
CR ×103 EXP. DATA L/1/3 = 4.66 L/1/3 = 5.08 L/1/3 = 5.74
0.25 0.30 0.35 0.40 0.45 0.50 0.55 Fn
Figure 27: [C 932 – Stagger 30 % LWL]
10 12 14 16 18 20
0 2 4 6 8
0.10.2 0.30.4 Figure 28: [C 925 – L/1/3 = 4.66] CR ×103 EXP. DATA STAGGER 20% STAGGER 30% STAGGER 10%
In the following figures the calculated factors are shown.
Fn 0.50.6 0.7 Figure 30: [C 932 – L/1/3 = 4.66]
0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3
0.25
Stagger 6 % Stagger 10 % Stagger 20 % Stagger 30 %
As observed for IT factor, also is dependant by the ship dimension. values are referred to the model scale and to fresh water at 15°C.
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5
Trim (deg)
Catamaran Stagger 6% Lwl Stagger 10% Lwl Stagger 20% Lwl Stagger 30% Lwl
0.25 0.30 0.35
0.40 0.45 0.50 0.55 Fn
Figure 29: [C 932 – L/1/3 = 4.66]
5.2 INTERFERENCE PHENOMENA The
performance evaluation C
of the
staggered
configuration has been carried out by means of factor. Its expression is:
TCATstaggered C
TCAT
Fn 0.30 0.35 0.40 0.45 0.50
©2007: Royal Institution of Naval Architects
B-29
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