Marine engine and transmission manufacturers need to size the main engines, choose gear ratios, and estimate shaft RPM and torque to support a ship or boat building refit or new construction project. This information is critical to the successful engineering of a ship’s propulsion system and also in the sizing of propulsion bearings, shafting, and associated equipment. HydroComp NavCad® is able to provide analysis on a wide range of propellers including open propellers, controllable pitch propellers, and ducted propellers.

Those working on yachts, small craft, and other vessels under nominally 75m (250ft) have the option of using HydroComp SwiftCraft® for analysis. SwiftCraft’s focus on the power train can also be used to size propellers and estimate shaft torque and RPM.

  • Propulsion and hull performance prediction

  • Sizing and matching of propulsion engines and transmissions

  • Forensic analysis to an existing system


Transmission selection and sizing
Marine transmission and gearbox manufacturers need tools to accurately analyze and predict the impact of changes to RPM for a wide variety of propulsors’ options. HydroComp NavCad® is able to do this for the most common maritime propulsor options found today – open propellers, ducted propellers, and waterjets. This information is valuable to size gear boxes for new customers and study the impact of changing the gear box for ships already in the fleet. When forensics are required to study a problem, a customer has NavCad provide insight into what is going on and the impact any changes in the propulsion system will have.

Engine selection and matching
Marine engine manufacturers need tools to accurately match, analyze, and predict the impact of changes to engine RPM and torque for a wide variety of propulsors’ options. HydroComp NavCad® is able to do this for the most common maritime propulsor options found today – open propellers, ducted propellers, and waterjets. This information is valuable for matching engines to propulsors for new customers and to study the impact of changing the engine on ships already in the fleet. When forensics are required to study a problem, a customer has NavCad provide insight into what is going on and the impact any changes in the propulsion system will have.

Popular software for this application
NavCad: for all boats and ships
SwiftCraft: for work boats and pleasure yachts nominally under 75 m (250 ft)