NavCad’s planing hull analysis now provides for the definition of hull warp, influence of propulsor lift, as well as improved trim tab contributions.
New capabilities for added drag prediction include extended definition and drag prediction for appendages, addition of spray drag for both planing and fast displacement hulls, and a ‘Workboat’ added seas drag prediction.
For propulsion analysis, there is a new system prediction for contra-rotating propellers (CRP). This is supplemented by improvements in propeller sizing and alignment to propeller model tests.
NavCad also provides utilities to help users assess the accuracy of their predictions. They can define benchmark vessels for graphical comparison on resistance, power, and propulsor efficiency, while vessel category ‘confidence lines’ can be used to set down historical ‘best case’ minimum drag and power limits.