| dc.description.abstract | The pressure that acts on the wetted surface area of coastal petrol craft always
maintains the equilibrium with the weight of the vessel. The acting pressure
comprises of two elements, i.e. hydrostatic which relates to buoyancy and
hydrodynamic which relates to speed of the vessel. The authors were involved in
planning a novel design of a monohull Coastal Patrol Craft with unknown
capabilities of dynamic behaviour with planning at initial stage. The research
objectives were to estimate the total weight, compare resistance for different LCG
positions, and the dynamic wetted area comparison for different LCG positions,
Effective power demand comparison for different LCG positions, dynamic trim
comparison for different LCG positions, and Planning capabilities for different LCG
positions. Five different LCG positions were considered during the study to realize
the craft’s behaviour. According to the numerical approach, craft’s behaviours
explored with the change in LCG positions and anticipated effect on the resistance,
effective power demand, dynamic trim, and Planning capabilities. Based on the
results, a small initial trim angle is required for the CPC to display optimal
performance at speeds in the upper range of the planing regime. On the other hand,
an initial trim by aft would increase the performance of the CPC at speeds lower than
the planing region but would adversely affect the performance at higher speeds as
the trim further increases due to dynamic behaviour. Further, this increase in trim
at higher speeds would result in dynamic instability and be detrimental to the
performance of the craft | en_US |
