Prediction Confidence: NavCad Features to Reduce Calculation Uncertainty
As we analyze or design a vessel, we use NavCad for hydrodynamic and propulsion system simulation. The Vessel-Propulsor-Drive system model is built upon predictions for the various component pieces of the system – resistance, propeller performance, hull-propulsor...3D Propeller CAD: Intro to Concepts, Tools, and Formats
3D CAD models are the standard for communicating propeller design data. These are used in various forms for visualization, performance simulation, and manufacturing/machining operations. In this half-hour webinar, we will review the basic concepts for preparing...Ducted propellers: Nozzle selection and hydrodynamics
Nozzles can be an incredibly valuable partner for a propeller. When used appropriately, these non-moving devices can supplement a propeller’s thrust for some applications – but not all. How can a non-moving device generate thrust? And what nozzle type is best for our...Planing Craft in NavCad: Data, Settings, and Options
We all know about planing hull drag prediction and typical hull form parameters – such as deadrise, LCG, chine beam. But what about the longitudinal and transverse variation in deadrise? Or how catamaran forms affect planing predictions? What is the influence of...Rudder Design: Practical and Analytical
We all know that rudders are a vital piece of our vessel’s operational equipment. But what determines the best type of rudder to use? How do we ensure that the rudder and propeller function well together? Can we use analytical tools to optimize a design? This...Engine curves: Implications for Propeller Sizing and Vessel Performance
Rated power and RPM will put an engine into a general category, but it does not tell the whole story about an engine’s power delivery. How do differences in engine power curve affect towing capability? Bollard pull? Or vessel acceleration over the planing hump? This...
Article: Thruster Tech – Capturing Performance Data for Design of Unmanned Vehicles
Conducting a sea trial is a necessary step upon delivery of a ship. This activity not only documents and validates anticipated ship speed and power, but if done correctly also provides performance data that can be useful for design purposes. The same holds true for...