NavCad

Planned for 2009

  • 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.
  • 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.
  • Measures of propulsion merit - A good designer always compares a design to industry-standard measures of merit. New propulsion criteria are being added, including "transport efficiency".

Added in 2008

  • 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. 

Added in 2007 and 2006

  • 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. The first of these include the prediction of dynamic trim, vessel squat, and synchronous pitching. 

Added in 2005

  • Propeller analysis - A new Aligned series propeller KT/KQ prediction option correlates a series prediction to a known propeller as defined with a user KT/KQ file.
  • Engine data - NavCad's engine file format now matches other HydroComp engine files, as well as conforming to contemporary practices.
  • Supplemental calculations - Calculations are now available that are beyond the typical set of resistance and propulsion analyses. The first of these include the prediction of dynamic trim and vessel squat.
  • Aligned series - Much like the bare-hull resistance "aligned prediction", the "aligned series" allows you to improve the propulsion analysis for non-standard series and unusual propeller types by anchoring a series calculation to a user-defined KT/KQ curve.

Delivered in 2004

- Major revision and improvement to the waterjet and engine libraries, including graphical plots of data.
- Expanded catamaran analysis capabilities, including both "system-oriented" catamaran methods and monohull-based methods with separate interference prediction.
- New file handling code to improve the read/write speed of NavCad project files (NC5).
- Enhanced data checking and addition of supplemental hull data.

Delivered in 2003

- New interface design (introduction of current design).
- Improved semi-displacement hull "method expert" prediction ranking.
- New drag prediction methods (e.g., NTUA).
- New propeller series (e.g., Kc ducted).


Product Update
Build: 5.10.0095
Release: Feb 2005

Build 5.10

Features
1. This is the first build for 2005 licenses.
2. A new Supplemental Calculations section under the Tools menu has been created for analyses beyond the standard resistance and propulsion calculations. This build includes calculations for the prediction of dynamic trim and vessel squat.
3. The program build number has been added to the project files.
4. Added a data graph on the custom Kt/Kq library data entry page.
5. Added indication of calculation support for bulbous bows and transom immersion to the help and User's Guide text for vessel resistance prediction methods.

Fixes
1. Fixed errors with prop sizing and cavitation correction of SP series propellers. Added stronger data checking.

Build 5.08

Features
1. This is the last build for 2004 licenses.
2. Added TCP/IP and static IP address functionality to improve network security access.

Build 5.07

Features
1. Added JPEG and BMP formats to plot save function.
2. Made minor improvement to acceleration calcs for very low starting speeds and proper final velocities.
3. Added table of J-KT-KQ-Eff values to the PropCoefs graph report.
4. Modified propeller sizing optimization priority when sizing for gear ratio alone.
5. Improved comparative graph legends.

Fixes
1. Fixed graphing error of missing curves on PS/N plot.
2. Fixed comparative plot error reading NC3, NC4 and MDL files.
3. Fixed minor window behavior problem on Propulsor page.

Build 5.06

Features
1. Improved import/export file handling to improve speed of data transfer.
2. Added data plot to the engine library data page.
3. Major revision and improvement to the waterjet library. Files will now contain the raw data (e.g., thrust-power-speed points), not the derived Ct/Cp points. Ct, Cp and Efficiency points are derived and displayed for each entered point. A plot of the data points has also been added. Impeller Kq (power-rpm) points can optionally include a boat speed correction.
4. Enhanced data checking for prop sizing and hull data.
5. Improved security notifications.
6. Added more non-dimensional parameter fields to the hull data entry.
7. Added planing hull correlation allowance data selection.

Fixes
1. Fixed minor graph file saving error. Also removed "Graph save" as a program option, leaving "Graph save as" for saving plots to a graphics file.
2. Fixed minor data error defining the "no load" point in engine library files.
3. Fixed minor Kt/Kq multiplier data error in the propeller sizing code.
4. Fixed network security problem (not releasing license on close).

Build 5.05

Features
1. Improved the notification of license status and updating of the security key for a new MSU subscription.

Fixes
1. Fixed minor parameter errors in Method Expert.
2. Fixed minor data control behavior in Resistance mode.
3. Fixed minor graph control behavior.
4. Fixed minor propeller t/c ratio scale correction error.
5. Fixed error in Propulsion spreadsheet recalculation when using waterjets.

Build 5.04

Features
1. Revised catamaran hull type selection to simplify use of this feature. The three hull type options (Monohull, Catamaran, Catamaran [Monohull-based]) were reduced to two (Monohull, Catamaran). When a catamaran hull type is selected, the list of resistance prediction methods will include "system-oriented" catamaran methods, as well as the monohull methods (which use the separate interference prediction).
2. Improved Aligned Prediction with catamaran models.
3. New file handling code was developed to improve the read/write speed of NavCad project files (NC5).
4. Modified appendage units so that all are now "vessel" units. Only propeller parameters are now in "prop units".

Fixes
1. Fixed minor a calculation error in the Propulsion interactive spreadsheet mode.
2. Fixed minor reporting errors.
3. Added supplemental data checking to help avoid internal math errors.

Build 5.03

Features
1. Improved display of significant digits in reports.
2. Added command line argument for network security. NavCad now needs to be run with the "/N" argument (e.g., "navcad /n") for network security access.

Fixes
1. Fixed minor display errors in reports.
2. Fixed propulsion sizing error when "RPM design point" was not 100%.

Build 5.02

Features
1. Release of NavCad 2003 full version.

SwiftCraft

Planned for 2009

  • New report viewer [currently available] - A new integrated report viewer provides enhanced reporting options, including direct to PDF. (Legacy HTML reports will still be supported.)
  • Effect of shaft angle [currently available] - 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.
  • 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.

Recently added features

  • RhinoMarine and Orca3D data exchange - SwiftCraft files can now be created in RhinoMarine or Orca3D and imported into SwiftCraft for further analysis.
  • Cavitation analysis - An improved analysis for trans-cavitating propellers, such as for 3-bladed propellers under heavy load at high speed.
  • Resistance prediction - Added new resistance prediction methods.
  • Data import - Added import capability for a variety of third-party files.

Added in 2005

  • Cavitation analysis - An improved analysis for trans-cavitating propellers, such as for 3-bladed propellers under heavy load at high speed.
  • Resistance prediction - Added new resistance prediction methods.
  • Data import - Added import capability for PHASER v3 report files (HTML).
  • RhinoMarine data exchange - SwiftCraft files can now be created in RhinoMarine and imported into SwiftCraft for further analysis.

Product Update
Release: February 2004

Build 1.20

Features
1. Added import capability for PHASER v3 report files (HTML).
2. Provided better handling of very-highly cavitating propellers in the propulsion analysis.

Fixes
1. Fixed minor reporting error for Bow and Stern type data.
2. Fixed a file read error for the propeller count (PropCount).

Build 1.14

Features
1. Added more data checking for vessel data to advise users when data is missing or appears incorrect.
2. Improved the "method expert" ranking when hydrodynamically-significant parameters greatly exceed the method's data set.
3. Developed a special "method expert" parameter check for the Oortmerssem method to identify combinations of parameters which have shown to give poor results.
4. Updated the "method expert" analysis of transom area for the various round-bilge "semi-displacement" methods.
5. Added minor improvements to the prediction of thrust breakdown under heavy cavitation for the Gawn AEW propeller series.
6. Added an integrated error file reporting feature which allows the user to automatically attach an error file and project file in an email to HydroComp support.
7. Added feature to display the results report in the default spreadsheet (e.g., Excel).

Fixes
1. Fixed minor error in planing calcs. This error would have occurred only if the LCG was unusually far forward.

Build 1.13

Fixes
1. Added code to handle international decimal separator formatting when using the keypad.
2. Fixed calculation error in the sailboat appendage drag prediction (potentially significant impact).

Build 1.12

Features
1. Improved coloring for prediction method selection tables.

Fixes
1. Fixed copy/paste function using Ctrl+C and Ctrl+V for numeric fields.
2. Fixed display error of strut boss length units (all calcs OK).

Build 1.11

Features
1. Minor performance improvement for propulsion sizing.
2. Improved planing method review in "method expert".
3. Added new low speed data checking for the Savitsky method in "method expert".

Fixes
1. Fixed minor error in wetted surface estimates (minimal impact).

Build 1.10

Features
1. Improved ranking of propulsive coefficient methods in the "method expert".
2. Improved data formatting on import of IDF files.
3. Improved "method expert" analysis of Delft methods with addition of waterplane coefficient.
4. Added more precise definition of B-series propeller limits.
5. Modified the prediction of trans-cavitation and full-cavitation performance for B-series and Gawn AEW propellers.

Fixes
1. Corrected error in displaying LCB origin (fwd AP, aft FP).
2. Fixed minor error in prediction of cavitation percentage.

Build 1.07

Features
1. Improved the calculation of drag for the Delft 23 method in the transition between the low and high speed prediction algorithms. This was done by a weighted smoothing through the average drag at the FN=0.45 transition point.
2. Improved "method expert" for Holtrop 1984 propulsive coefficient method.
3. Improved "method expert" display to show parameters in a common order and to remove wetted surface coefficient as a parameter.
4. Added LCB check for the Oortmerssen prediction method in the "method expert".

Fixes
1. Corrected a minor error to a Delft 23 coefficient (minimal impact).
2. Corrected NPL speed parameter display.
3. Fixed display of error message for Holtrop 1984 propulsive coefficient prediction during propeller sizing.

Build 1.06

Features
1. Split the USNA YP resistance prediction method into two - Round bilge and Hard chine. Data files saved before this version will point to the Round bilge variant.
2. Allow copy of a highlighted selection in the results table to paste into a spreadsheet (like Excel).
3. Significantly improved the "method expert" with implementation of HydroComp research into range of prismatic coefficient (CP), waterplane coefficient (CW,CWP) and transom immersion (AT/AX) for high-speed transom-stern craft. An upper speed limitation has been developed and applied to the following methods - CRTS, DeGroot RB, Holtrop 1984, HSTS, Jin 1980, Jin 1988, Mercier.
4. Added import capability for PHASER v2 report files (HTML).

Fixes
1. Identified error with published coefficients in Delft 123 method at FN=0.40. Removed this point to allow prediction to spline through the point.
2. Very minor correction to the Delft 2 & 3 series calculations for correct original model length of these series.

Build 1.05

Features
1. Added better data checking for Hoerner appendage calculations.
2. Improved Drag reduction feature to provide better guidance as to the significance of a parameter.
3. Improved "method expert" prediction method ranking feature to provide better analysis of the effect of immersed transom.

Fixes
1. Fixed error with bulb length on IDF file import.
2. Fixed units errors on Vessel report page.
3. Fixed potential calculation errors when setting LCB reference value to "Fwd of AP". (No error when using "Aft of FP".)
4. Fixed error in read/write of Design margin to the project file.

Build 1.04

Features
1. Added import capability for Autopower files and Hullspeed spreadsheet data.
2. Added Administrator option for use of JPEG file for report graph (to support Netscape browser).

Fixes
1. Corrected conversion error in tip speed units.
2. Minor report corrections and additions.

Build 1.03

Fixes
1. Corrected behavior of "Create file" tasks (for engines, etc.).

Build 1.02

Fixes
1. The calculation of Rtotal was incorrect when using a design margin and any units other than LBS.
2. Addition of water type on the reports.
3. Correction to list of displayed parameters of the VTT HC method.
4. Improvement to entry and deletion of speeds.

SwiftTrial

Planned for 2006

  • Effect of shaft angle - High shaft angle can greatly affect a propeller's thrust and torque. Properly evaluate engine overload and peak cavitation with a new "inclined flow" algorithm .

Product Update
Release: October 2003

Build 1.02

Features
1. Updated Gawn AEW cavitation calculation.
2. Added four user-definable "extended data" fields. (This removes "trim angle" as a standard field, as was shown in the 2003 evaluation copy.)

PropCad

Planned for 2009

  • New report viewer - A new integrated report viewer provides enhanced reporting options, including export to PDF, CSV, and RTF.
  • Job Tracker - A new project management utility will allow you to track the time that NavCad is used on your projects.
  • New design calculations - Additional data and calculation support for wake adapted propeller design. More data exchange with propeller hydrodynamic codes.

Recently added features

  • New section geometries - A modified Kaplan (with thicker edger) is under development
  • CAD/CAM exports   - Now includes Pro/E, blend file, Rhino 4, Solidworks 2005+ and Unigraphics NX.
  • New section fitting - New capabilities to insert and smooth sections.
  • Inspection report - Check measured face pitch values to design values. This is the first of a planned collection of inspection reports.
  • Supplemental calculations - New calculations, including a new wetted added mass calculation and an improved wetted inertia calculation.
  • New section format - Now define section data in thickness-camber format (in addition to the standard X-Y format).
  • Builder options - Additional high-performance blade section geometries.
  • Section design - New features for greater control over section geometry.
  • Effective pitch - Calculation and display of hydrodynamic effective pitch for variable pitch designs.

Added in 2005

  • CAD/CAM exports - Now includes DELCAM PowerSHAPE.
  • Offsets and reports  - Now displayed in HTML format in a browser .
  • New Scan Converter "face/back" option - Use data from a 3D scan of both surfaces.
  • New Builder data files - For custom section geometry and parametric distributions. 

Delivered in 2004

- Animated rotation of the 3D View.
- Builder options for "High thrust" pitch distribution and "Modified Gawn" sections.
- Updated ABS thickness rules.
- Added BV/RINA and Korean Registry thickness rules.
- Wetted inertia calculation (i.e., entrained water).
- Cambered propeller opt

Product Update
Build: 4.30.0130
Release: Jan 2004

NOTE: A PDF file (PropCadUGAddl420.PDF) has been installed into your PropCad directory. This file contains Supplemental Documentation for the update.

Build 4.31

Features
1. Added section offset points to the Rhino 3 macro export file.
2. Added import of PropExpert 2004 project file, which allows PropExpert users to transfer data from PropExpert to PropCad.
3. Added a "Thruster" propeller section type. This is a symmetrical section used for applications such as bow thrusters.

Fixes
1. Improved behavior of display of 2D section graphic on the Edit Section form.
2. Fixed error when a "most recently used" file no longer exists.

Build 4.30

Features
1. Added a "rotating propeller" 3D View option. Launch the rotating display with the "Face rotate" or "Back rotate" selection in the3D View view-type listbox.
2. The ABS thickness calculations were revised to include the newest 2002 and 2003 rules.
3. Added thickness calculations for the rules of BV/RINA (Bureau Veritas & RINA) and KR (Korean Registry).
4. The export of DWG & DXF files has been updated to improve readability. (The update required altering the type of spline used for curved lines.) This resulted in a more well-behaved export of both DWG and DXF files. (Please note that some CAD software still cannot fully read the DXF export from PropCad.)
5. Added an integrated error file reporting feature which allows the user to automatically attach an error file and project file in an email to HydroComp support.
6. Added Rhino 3 command file export.
7. Added a wetted inertia (i.e., entrained water) calculation. The results are shown in the Principal Characteristics table.
8. Added camber feature to the Builder. This allows a simplified arc-shape or cosine-shape shift of 2D section offsets for applied camber.
9. Added PropCad Template file import/export option. This feature clarifies the process of using an existing PropCad design as a "parent" or "template" for a new variant.

Fixes
1. An error in the transform of Chord/MaxT (C/MT) was fixed in the Edit section form.
2. Fixed an error in the calculation of 2D X-offset values in Scan Converter. The error was an issue only for face offset points located significantly off of the pitch plane (as might be found on blades with cup or high camber).
3. Fixed a variety of minor interface behavior errors in Scan Converter.
4. Fixed minor PC4 data file read/write errors. The errors only occurred if no sections were defined.

Build 4.21

Features
1. PropCad now reads legacy PropCad 2/3 design files (in the VCD format) from the Import command (moved from Open).
2. Units and Page orientation options in the Border/Title block information page have been improved to allow for user-selected preferences (rather than default printer settings).
3. You can now export a JPEG graphic of the 3D View using the "Save 3D View as..." menu command.

Build 4.20

Features
1. Introduced Scan Converter add-on to take scanned blade surface data (in XYZ or polar format) and convert it into a PropCad design file. Scan Converter is not part of the standard version of PropCad. An upgrade to PropCad Level 2 is needed to use Scan Converter. NOTE: Please see Appendix I for more information. (PDF file PropCadUGAppI.PDF was installed to your PropCad directory.)

Build 4.10

Features
1. A new Builder option is available for the pitch distribution - "High thrust". This distribution reduces the pitch at the tip and root in a manner typical for high thrust applications, where control of noise and vibration is important.
2. A new set of propeller Sections is available for the Builder. This new option - "Modified Gawn" - is based on the Gawn propeller, but with a curved face surface near the root. The role of this new geometry near the hub is to provide greater physical clearance between the blades, and also to reduce the camber in this region (with a corresponding reduction of local lift and blade pressure) without altering the strength characteristics at the root.

Fixes
1. The output of the angular position (Theta) is now expressed in degrees. (It was showing as radians.)

Build 4.02

Features
1. A new Settings screen has been added to allow the definition of program and new file start up values, font settings for the CAD View, and axis orientation for the ASCII export files. Click Edit | Settings... to launch this form.
2. Two new file save options have been added for the CAD View - AutoCAD DWG and Windows Metafile (WMF).

PropExpert

Planned for 2009

  • Camber analysis - A performance correction is in development for the effect of camber (progressive pitch).
  • Speed prediction - New speed prediction options are being developed to insure accurate prediction of real speed and power. Select from additional "Average hull" prediction methods to better reflect known performance for a particular vessel type, such as for long slender river boats.
  • Additional vessel types - In addition to the standard "Displacement", "Planing" and other vessel types, a number of new types (e.g., Planing catamaran, Tug/barge) will allow for improved prediction of associated Vessel parameters and speed prediction.
  • Prior trial correlation - Using an "overload test", PropExpert will be able to help correlate the analysis of a Prior trial to known values. This information will aid in describing the true performance of the boat as accurately as possible.

Recently added features

  • New report viewer - A new integrated report viewer provides enhanced reporting options, including direct to PDF. (Legacy HTML reports are still supported.)
  • 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.
  • 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.
  • New cupping analysis - A new prediction method for the effect of cupping was developed based on a re-analysis of cupped propeller data, and is now available in PropExpert.
  • Cavitation analysis - An improved analysis for trans-cavitating propellers, such as for 3-bladed propellers under heavy load at high speed.
  • Loading checks - Supplemental propeller Power Loading check to indicate potential cavitation and thrust breakdown before sizing.
  • Supplemental calculations - Improved shaft diameter calculation. 
  • Library data - New propeller models added to the library. 
  • Speed validations - Additional speed prediction validation checks using predicted Transport Efficiency. 

Added in 2005

  • Cavitation analysis - An improved analysis for trans-cavitating propellers, such as for 3-bladed propellers under heavy load at high speed.
  • Loading checks - Supplemental propeller Power Loading check to indicate potential cavitation and thrust breakdown before sizing.
  • Supplemental calculations - Improved shaft diameter calculation. 
  • Library data - New propeller models added to the library. 
  • Speed validations - Additional speed prediction validation checks using predicted Transport Efficiency. 

Delivered in 2004

- Release of PropExpert 2004, with improved interface and file handling.
- Significant R&D leading to a new performance analysis for trans-cavitating propellers operating under excessive cavitation.
- Notification of "Breakdown" when excessive thrust/power breakdown occurs under cavitation.

Product Update
Build: 5.02.0060
Release: Jul 2004

Build 5.02

Features
1. Improved cavitation analysis for trans-cavitating propellers. This is a significant revision, in that it will better predict the power demand of those propellers operating under excessive cavitation.
2. Added notification of "Breakdown" when excessive thrust/power breakdown occurs under cavitation.
3. Improved the Prior trial prediction of the Pitch advance check to account for cupping.
4. Added a Suggest button to the Gear efficiency field.
5. Added a Gear efficiency field to the Prior trial page, including a Suggest button.
6. Added Temet 25 to the shaft material list.
7. Added a number of small revisions to improve program behavior. These have no effect on results.

Fixes
1. Modified the Data entry forms to improve visual appeal.
2. Fixed minor error in the Top/Cruise speed data check.

Build 5.01

Features
1. Improved preliminary speed and power estimates.

Fixes
1. Fixed minor graphing error with Bollard service type.
2. Fixed minor cavitation checking error.
3. Fixed minor propeller model name import error.

Build 5.00

Features
1. Release of PropExpert 2004 full version.

 

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