PropCAD Release Notes

NOTE: A PDF file (PropCadUGAddl2003.PDF) has been installed into your PropCad directory. This file contains Supplemental Documentation for the update.

Build 4.31

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.

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

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.
10. Added a 2D section graphic on the Edit Section form.

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.
5. Fixed minor error with the TT Rotate setting on the Options form.

Build 4.21

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

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

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

New Builder pitch distribution
A new option is available for the pitch distribution in the Builder - "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.

New Builder propeller type
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.

Build 4.02

Settings screen
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.

New CAD View file save options
Two new file save options have been added for the CAD View - AutoCAD DWG and Windows Metafile (WMF).

Build 4.01

Integrated CAD View
Prior to v4, PropCad was a "client" application within the Visual CADD "host". We have now embedded the Visual CADD drawing features that are of use to PropCad within the PropCad application itself. In other words, the CAD functions are a "client" of PropCad. This approach also allows for the export of DXF (AutoCAD) and GCD (GenericCADD) file formats from within PropCad.

New project file format
A new project file (PC4) has been developed for this version as part of the revisions with the Visual CADD functions. Prior version of PropCad used Visual CADD's native file format (VCD) to store the parametric data used to build the propeller designs. PropCad now has its own file format, as well as can read/write legacy VCD files.

Suction and pressure surfaces of different chord length
The ability to define different chord lengths for suction and pressure faces is critical for the contemporary section shapes being used for high-performance applications. Designs for most conventional applications are based on a style with common chord length (e.g., B-series, AU, and even Gawn). High-performance designs, however, often require a higher level of curvature to the blade sections, resulting in leading and trailing edge geometries that do not begin and end at the same chord-wise position. PropCad v4 is now fully able to handle these advanced sections shapes.

Cupping "wizard" in PropCad's Builder
One design attribute that is frequently used for high-performance propellers is "cupping". Using the Builder, the magnitude and radial distribution of cup can be applied to a design.

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