گروه خدمات فنی مهندسی رهگشافن

NavCad is a software tool for the prediction and analysis of vessel speed and power performance. It also provides for the selection of suitable propulsion system components - engines, gears and propellers. Built from a very comprehensive library of algorithms, NavCad can be used for the design and analysis of virtually any type of monohull or catamaran - from large displacement vessels to fast planing craft.
 

 Features

Used by (over 500 worldwide)

• Resistance prediction
• Steady-state propulsion analysis
• Vessel acceleration analysis
• Propulsion sizing

• Naval architects and designers
• Ship and boat builders
• Propulsion equipment manufacturers
• Navies, coast guards & schools

• Ocean-going merchant and naval vessels
• Small ships and work boats
• Motor and sailing yachts
• High-performance vehicles
• River barge trains

• Conventional propellers (open and ducted)
• Waterjets
• Special propellers (surface and cycloidal)
• User-defined propulsor performance

• New report viewer [currently available] - A new integrated report viewer provides enhanced reporting options, including export to PDF, CSV, and RTF.
• Propeller CAD shape [currently available] - Easily generate a suitable propeller CAD shape for your 3D design. One click will export a representative propeller CAD shape in IGES format at the proper diameter and number of blades.
• Measures of propulsion merit [currently available] - A good designer always compares a design to industry-standard measures of merit. New propulsion criteria are being added, including "transport efficiency".
• Job Tracker - A new project management utility will allow you to track the time that NavCad is used on your projects.
• Enhanced definition of hull data - This new utility will help users define significant hull parameters via longitudinal distributions. For example, user entry of sectional areas is used to calculate a proper effective transom area - critical for reliable resistance prediction of semi-displacement hulls.
• Propeller lift forces - High-speed planing craft are influenced by lift from the propeller. The difficult calculation of the prediction of propeller lift force due to shaft angle (for both planing and propulsion analysis) is in development.

• Interface update - A new design of main Resistance and Propulsion pages, including analysis parameter entry tables.
• Task List - A user Task List to create and track project tasks.
• Hydroacoustic analysis - Estimate blade impulse and tip vortex pressures.
• Cavitation analysis - A new proprietary prediction method for propellers in the transcavitating mode was added to NavCad, and presented at the WMTC2006 Conference in London.
• Effect of shaft angle - High shaft angle can greatly affect a propeller"s thrust and torque. Avoid unexpected overload and peak cavitation surprises with a new "inclined flow" algorithm.
• River barge train resistance - A new supplemental calculation for the prediction of river barge trains (flotillas, convoys) has been added.
• Blade scan analysis - Enter local pitch and chord length at a few radii as measured from a blade scanning device, and this utility will help you determine the propeller"s EAR and hydrodynamic mean pitch.
• Supplemental calculations - Calculations are now available that are beyond the typical set of resistance and propulsion analyses, now including . The first of these include the prediction of dynamic trim, vessel squat, and synchronous pitching. 

Nueva versión del software de resistencia y propulsión NavCad - InfoMarine Enero 2004 [PDF format, 110KB]