FREE!ship Plus is a naval architecture tool for analyzing hull resistance, power requirements, hydrostatics and stability. It combines a vessel's hull, appendages, propeller and engine in performance calculations, with options to account for wind, waves, shallow water and towing or pushing. Published model-test methods and propeller diagrams support comparisons across a range of vessel designs.
| Author: | Timoshenko V.F. |
| License: | Freeware |
| Price: | FREE |
| Released: | Nov 19, 2013 |
| File size: | 2.20 MB |
| Downloads: | 355 |
| Keywords: | hull design software, ship calculation, hydrostatics, calculate hydrostatics, Timoshenko V.F., ship resistance calculator, calculator, propeller performance calculator, vessel hydrostatics software, ship hydrodynamics, Windows 10 compatible, calculate, calculate ship resistence, Freeship Plus, boat stability analysis, 3D modeling, ship power prediction |
| Author URL: | http://freeship-plus.pisem.su |
FREE!ship Plus is a naval architecture and vessel-performance program for designers, shipbuilders, students and hobbyists. It supports parametric analysis of hull resistance, propulsion and related hydrodynamic behavior for ships, boats and underwater vehicles. The software can examine a vessel as a connected system of hull, appendages, rudders, keels, propeller and engine, helping users assess how their combined characteristics affect operation.
The program calculates hull resistance and estimates the power needed for a vessel to move through water. Its methods draw on published model-test series, with more than 27 resistance methods and series and 17 propeller diagrams covering five propeller types. Input checks help identify values outside a method's stated range; where appropriate, calculations can extrapolate beyond model-test data. If a design does not fit a particular series, users can instead refer to test data for vessels with similar hull stations. These options help designers compare predictions while keeping track of the limits of the underlying methods.
FREE!ship Plus also calculates hydrostatics and stability, and evaluates propeller characteristics such as thrust and torque. Its analysis can account for service conditions and environmental influences, including wind, waves and shallow water, as well as towing or pushing. The software includes resistance calculations for 11 types of appendages. Hull-form design tools support changing hull contours through affine transformations, so alternative shapes can be assessed for their effect on towing resistance and power requirements.
These capabilities suit early-stage design and comparison of alternatives for marine and river boats, catamarans, trawlers, fast motorboats, yachts, canoes and kayaks. Users can investigate how changes to a hull or propulsion setup affect predicted performance before committing to a build. Calculations based on model-test series can provide useful estimates, but they do not replace physical testing or professional validation where precise performance figures are required.
FREE!ship Plus is freeware and is based on the open-source FREE!ship 2.6 project, which was released under the GNU General Public License. It is intended for educational use, home boatbuilding, ship modeling and naval architecture work. The available operating-system information includes Windows 10 and earlier Windows releases; Windows 11 compatibility is not established. The program focuses on vessel design and analysis rather than general-purpose CAD or navigation.