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The simulation in Fig.3 shows that the model A is having less fluids pressure due to a larger S/L ratio anc asymmetric outrigger hulls placement which then leads to a higher turbulence effect (TED and TKE). The difference of the second RC model is that the model B is having lower turbulence effects (TED and TKE) due to the smaller value of S/L ratio and asymmetric outrigger hulls placement, besides that these factors also leads to the pressure enhancement especially in the after peak part of the model. The model C is having the highest value of turbulence eddy dissipation due to the larger S/L ratio and the symmectric outrigger hulls placement. Because of the value of the S/L ratio is the same as model A the approximation of the turbulence kinetic energy value is near. The CFD simulation then used to clarify the total resistance calculation based on the fluids flow model measurements to enhance the accuracy of the results data in this research and the water condition in this research was assumed as smooth water. Based on Savitsky planning theorem in hydrodynamics evaluation of planning hulls in smooth water, it has been found that the flow which separated from the chine may reattach to the side of the prismatic hull at some distance forward of the transom for certain combinations of C,, B, r, and mean wetted length- beam ratio\. An empirical formulation of the slope of the line through the data is [7]:

Figure 3 The simulation in Fig.3 shows that the model A is having less fluids pressure due to a larger S/L ratio anc asymmetric outrigger hulls placement which then leads to a higher turbulence effect (TED and TKE). The difference of the second RC model is that the model B is having lower turbulence effects (TED and TKE) due to the smaller value of S/L ratio and asymmetric outrigger hulls placement, besides that these factors also leads to the pressure enhancement especially in the after peak part of the model. The model C is having the highest value of turbulence eddy dissipation due to the larger S/L ratio and the symmectric outrigger hulls placement. Because of the value of the S/L ratio is the same as model A the approximation of the turbulence kinetic energy value is near. The CFD simulation then used to clarify the total resistance calculation based on the fluids flow model measurements to enhance the accuracy of the results data in this research and the water condition in this research was assumed as smooth water. Based on Savitsky planning theorem in hydrodynamics evaluation of planning hulls in smooth water, it has been found that the flow which separated from the chine may reattach to the side of the prismatic hull at some distance forward of the transom for certain combinations of C,, B, r, and mean wetted length- beam ratio\. An empirical formulation of the slope of the line through the data is [7]:

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Also in this research the boat categorized as a planning hull boat. By definition, a planning hull boat described as a hull form which is configured to develop the positive dynamic pressure, so that it’s draft decreases and with increasing speed. The dynamic lift reduces the wetted surface area and therefore also the drag. Planning hulls are more efficient at higher speeds, although they still require more energy to achieve these speeds [3]. Therefore this research shall focus on the hull development of an outrigger RC model boat which then hoped to be a good start in the power outrigger type boat development. To enhance the accuracy in the results data which will be gathered in this research, the boat shall be conditioned with three different demi-hulls positions with fixed S/L ratio which is 5.45 measured from the main hull outer body to the outer body of the demi-hull and also fixed hull positions differences, one with the aligned forepeak and the other is not aligned which pictured in Fig.1
Also in this research the boat categorized as a planning hull boat. By definition, a planning hull boat described as a hull form which is configured to develop the positive dynamic pressure, so that it’s draft decreases and with increasing speed. The dynamic lift reduces the wetted surface area and therefore also the drag. Planning hulls are more efficient at higher speeds, although they still require more energy to achieve these speeds [3]. Therefore this research shall focus on the hull development of an outrigger RC model boat which then hoped to be a good start in the power outrigger type boat development. To enhance the accuracy in the results data which will be gathered in this research, the boat shall be conditioned with three different demi-hulls positions with fixed S/L ratio which is 5.45 measured from the main hull outer body to the outer body of the demi-hull and also fixed hull positions differences, one with the aligned forepeak and the other is not aligned which pictured in Fig.1
Fig.2. Lines Plan of Outrigger RC Model. In order to expand the usage of the outrigger boat, a RC power outrigger boat design is developed based on resistance analysis. The principal particulars of the models are shown in Table 1 and Fig. 2.
Fig.2. Lines Plan of Outrigger RC Model. In order to expand the usage of the outrigger boat, a RC power outrigger boat design is developed based on resistance analysis. The principal particulars of the models are shown in Table 1 and Fig. 2.
Table.2 Outrigger RC Model (A) (B) (C) from CFD Results Because of the lift only happen in the first beat of the model’s speed, the research then focused on the first 1 m/s of the RC boat speed, which have the most impact of the lift force that caused by the existence of the hydrodynamic pressure so that the model had a trim moment that can be express mathematically as:
Table.2 Outrigger RC Model (A) (B) (C) from CFD Results Because of the lift only happen in the first beat of the model’s speed, the research then focused on the first 1 m/s of the RC boat speed, which have the most impact of the lift force that caused by the existence of the hydrodynamic pressure so that the model had a trim moment that can be express mathematically as:
Table 3. Outrigger Model Results From the total and slender body resistance calculations, some results also had been found as follows:
Table 3. Outrigger Model Results From the total and slender body resistance calculations, some results also had been found as follows:
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