OpenVSP

OpenVSP

Developer(s)	NASA
Initial release	January 10, 2012; 12 years ago (2012-01-10)
Stable release	3.38.0 / April 17, 2024 (2024-04-17)
Repository	github.com/OpenVSP/OpenVSP
Open Source
Website	openvsp.org/

OpenVSP, also known as Open Vehicle Sketch Pad, is an open source parametric aircraft geometry tool originally developed by

among other contributions.

OpenVSP allows the user to quickly generate computer models from ideas, which can then be analyzed. As such, it is especially powerful in generating and evaluating unconventional design concepts.^[4]

Features

User interface

OpenVSP displays a graphical user interface upon launch. A workspace window and a "Geometry Browser" window open. The workspace is where the model is displayed while the Geometry Browser lists individual components in the workspace, such as fuselage and wings. These components can be selected, added or deleted, somewhat like a feature tree in CAD software such as Solidworks. When a component is selected in the Geometry Browser window, a component geometry window opens. This window is used to modify the component.

OpenVSP also provides

Geometry modelling

OpenVSP offers a multitude of basic geometries, common to aircraft modelling, which users modify and assemble to create models. Wing, pod, fuselage, and propeller are a few available geometries. Advanced components like body of revolution, duct, conformal geometry and such are also available.

Analysis tools

Besides the geometry modeller, OpenVSP contains multiple tools that help with aerodynamic or structural analysis of models. The tools available are:

• CompGeom - mesh generation tool that can handle model intersection and trimming

• Mass Properties Analysis - to compute properties like
  centre of gravity and moment of inertia
• Projected Area Analysis - to compute project area
• CFD Mesh - to generate meshes that may be used in Computational fluid dynamics analysis software
• FEA Mesh - to generate meshes that may be used in FEA analysis software
• DegenGeom - to generate various simplified representations of geometry models like point, beam and camber surface models
• VSPAERO - for
  flight dynamic
  analysis

• Wave Drag Analysis - for estimating wave drag of geometries
• Parasite Drag Analysis - for estimating parasite drag of geometries based on parameters like wetted area and skin friction coefficient
• Surface fitting - for fitting a parametric surface to a point cloud
• Texture Manager - for applying image textures to geometry for aiding visualization
• FEA Structure - for creating internal structures such as ribs and spars

Compatibility with other software

OpenVSP permits import of multiple geometry formats like STL, CART3D (.tri) and PLOT3D. Point clouds may also be imported and used to fit a parametric surface.

Geometry created in OpenVSP may be exported as STL, CART3D (.tri), PLOT3D, STEP and IGES, OBJ, SVG, DXF and X3D file formats. These file formats allow geometries to be used for mesh generation and in CFD or FEA software.

OpenVSP Hangar

OpenVSP Hangar provides users a place to upload models and promotes sharing of geometry created in OpenVSP. Each model is allowed revisions with accompanying details on source quality.^[6]

OpenVSP Ground School

OpenVSP Ground School is a set of comprehensive tutorials under development by Brandon Litherland at NASA. Ground school tutorials provide details on OpenVSP features and techniques, along with tutorials for beginner and advanced users.^[7]

References