Orca3D News

Sunday, February 26, 2012

New Release of Orca3D (Version 1.2.3)

We're pleased to announce the release of a new version of Orca3D. This new version (1.2.3), which is a free update to our users, contains a number of new features, feature improvements, and bug fixes. If you have been following the Work-in-Progress (WIP) process, you're already aware of many of them. Some highlights include: 
  • Native support for 64-bit and 32-bit Rhino 5, as well as Rhino 4
  • Optional Network Licensing
  • InsertNet and RemoveNet commands
  • Improved Hull Assistant controls and user-definable section locations in Hull Assistants
  • Hull Assistant for Rigid Inflatable Boats (RIBs)
  • Export to ORC offset files
  • "Pre-float" check can be run before hydrostatics are calculated, in order to review the model for errors (this option can be disabled)
  • Real-time sectional area curve display as the model is edited
  • New straighten points command
  • Import/Export Stock Material Property files
  • Support for blocks in Weight/Cost
  • CSV output for resistance predictions
  • Customization of report formats  
A few important notes to be aware of: 
  • Only one version of Orca3D may be installed at a time. Therefore, you must uninstall any previous version of Orca3D from your computer before installing this version.
  • If you have a license of Orca3D, you should not need to do anything other than uninstall any previous version of Orca3D and install the new one.
  • No change to your License is required. The new version of Orca3D will find your existing License.
  • If you don't have a license and are evaluating Orca3D, you can go through the same uninstall/install process. If your 15 day evaluation period has expired, send your Installation ID (available from the Orca3D License Manager) and request an extension.
  • Any Orca3D information in a Rhino file that is saved with this new version will NOT be backwards compatible to version 1.1.0 or earlier versions. No Rhino information will be lost, but Orca3D information, such as section locations, weight/cost information, etc. will not be found by earlier versions of Orca3D.

If you have questions as you install and use the new release, remember that you can: 
  • send an email to support@orca3d.com
  • read through the Help file which is available from the Orca3D menu in Rhino, and on our web site here
  • post a question on the Orca3D forum
To download the new version, please visit www.orca3d.com/update.

Thank you very much for using Orca3D, and we look forward to hearing from you!

Tuesday, February 21, 2012

Trim Angle in Savitsky (planing) Analysis

We're sometimes asked whether the running trim angle that is reported in Orca3D's planing analysis is relative to the geometry as-drawn (i.e., as it is oriented in the Rhino coordinate system), or if it includes the effect of any static trim (that is, if the weight/CG that is used would result in an orientation different from how the boat is modeled).

The short answer to the question is that the reported trim angles are relative to the geometry as-drawn. Of course, if the boat is modeled such that the hydrostatic condition does not result in any trim relative to how the boat is modeled, there is no ambiguity. If there is significant static trim, it would be best to re-float the model using Orca3D's "Transform Model to Resultant Flotation Plane" option in the Hydrostatics dialog, so that the station shapes that are used in the Savitsky analysis are accurate representations of the vessel at rest.

But there is more to the answer, and it is well described in this post on HydroComp's blog (the Speed/Power library in Orca3D is licensed from HydroComp): http://navcadknowledge.wordpress.com/2008/11/04/savitsky-dynamic-trim/ 

Monday, February 20, 2012

New Orca3D Demonstration Video: Stability Criteria Evaluation

This demonstration shows how a set of stability criteria to be evaluated is defined, and how Orca3D can compute the intact stability and determine if the vessel will meet the criteria. This functionality is available in the Work-in-Progress (WIP) release, and will likely remain a WIP-only function for a while longer while we gather user feedback.

Thursday, February 16, 2012

New Demonstration Video: Lines Drawings and Offset Tables

We were recently asked how to place a table of offsets on a lines drawing. This new demonstration video demonstrates creating a lines drawing, an offset table, and then placing the offset table on the lines drawing.

Thursday, February 9, 2012

New Orca3D Demonstration Video on YouTube: Outward Normals

We've posted a new demonstration video on the subject of outward normals; why they are important in hydrostatics calculations, how to check them, and how to change them if necessary.

Tuesday, February 7, 2012

Setting the Fluid Density in Orca3D

When computing hydrostatics, it's important to be aware of the density of the water that the vessel will be floating in. Is it seawater, freshwater, or something in between? What is the water temperature? There are a number of "standard" values for the density, so if your customer (e.g., a classification society) has specified a value, you should use that in your analyses in Orca3D.

Orca3D allows you to specify the fluid type and corresponding mass density. The default is seawater, with a mass density of 1025.9 kg/m^3. To change this, select Properties in the Orca3D menu. In the Properties dialog, click on the Hydrostatics tab. There you can select a Fluid Type of Seawater (1025.9 kg/m^3), Freshwater (999.0 kg/m^3), or Other (which allows you to enter the Mass Density).

If you routinely use something other than the default Mass Density, and/or other custom Orca3D and Rhino settings, an easy way to start each new design is to set all of the settings (fluid density, Orca viewports, Orca units, Rhino units, grid settings, etc.), and then save the file as a template (File/Save As Template). When you start Rhino, type New, and select your template from the list. If you want to automatically use this template each time Rhino starts, check the box next to "Use this file when Rhino starts."