FlightStream Aerodynamic Modeling Software
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Validation Case Studies

Aerodynamic Modeling Software

An aerodynamics tool for modeling and analyzing aircraft, propellers, high-lift devices and jet engine effects.

FlightStream® is a surface vorticity flow solver designed to allow users to develop optimized designs for compressible and incompressible subsonic vehicles as well as transonic vehicles. Equipped with the state-of-the-art unstructured surface-mesh compressible-flow vorticity solver, FlightStream® eliminates the costly process of volume mesh generation and mesh-dependency on flow-field solutions and stability. FlightStream® provides the ability to design airplanes within an optimization pipeline in a fraction of the time taken by conventional CFD solvers. FlightStream® integrates with CAD, allowing users to import their geometries designed in any commercial CAD/CAE software. The FlightStream® vorticity solver works from very small mesh sizes compared to traditional CFD solvers and serves to reduce user input in generating high fidelity surface meshes. FlightStream® is one of the most versatile and powerful aerodynamic analysis tools for aerospace, marine and alternative energy applications today.

What Makes FlightStream® Unique?

FlightStream® is a unique aerodynamics tool with many advantages over traditional CFD and panel codes.


FlightStream® can produce aerodynamic load results with the same accuracy as high fidelity CFD software in a matter of minutes, instead of hours.


The solver is based on surface vorticity instead of pressure-integration, which is more robust than traditional panel code solvers.


Unstructured surface meshes can be easily created from CAD, eliminating the need to develop time-intensive structured meshes required by most panel codes, or extensive volume meshes for traditional CFD solutions.


The boundary layer model for skin friction drag uses surface vorticity.

Fast & Simple Work Flow

Complex Modeling Applications

High-Lift Devices

High-Lift Devices such as flaps, slats, spoilers, etc. can be modelled in FlightStream® to analyze how the flow over the wing interacts with these complex geometries.

Finite Element Analysis

FlightStream® allows the structural analysis engineer to quickly evaluate fluid interaction effects, by generating pressure forces and mapping load distributions and moments.

Jet Engine Effects

Jet Engine Effects can be modelled in FlightStream® without a structured volume mesh, which saves valuable time when it comes to analyzing this complicated flow problem.


Propellers can be modelled in steady and unsteady flow. For steady flow, the propellers are modeled as actuator disks to simplify the analysis. All that is required are the operating characteristics of the propeller (e.g. thrust, power and RPM). In unsteady flow, propellers are modeled as rotating wings, which accurately captures the interactions between the propellers, wings and bodies. Below you can see the propeller modeling landscape in FlightStream®.

Extensive Validation

Accurate and reliable results are the foundation of FlightStream’s development. To ensure accuracy and reliability, extensive validation has been performed using peer reviewed wind tunnel data. Comparing FlightStream® results with experimental data for all types of configurations and flight conditions has successfully validated its solutions. Below the validation is given for the Cessna 210 and NASA E.E.T. AR-12.

NASA EET Validation

Lift Curve Validation

Cessna 210 Validation

Drag Polar Validation

View Validation & Case Studies


The CHM help file is showing up blank when opened from a network location

If the CHM file is located on a network location (not on the local computer), the file may open up blank.  This can be fixed with the following steps:

  1. Run Regedit.
  2. Open or create (if it does not exists) the key:
  3. In the new key, add a new DWORD subkey named MaxAllowedZone and set one of the following values there (a value of 1 allows it to open from a network location):
    0 – My Computer
    1 – Local Intranet
How does FlightStream® handle CAD geometry?

FlightStream® has its CAD library and meshing tools developed in-house (no third-party meshing tools needed) where Parasolid or IGES files can be imported. FlightStream® can export geometry to STL, Wavefront Object (.obj), Standford Polygon (.ply) or TRI files.

How is FlightStream® faster comparing to other panel codes?

FlightStream® uses surface vorticity sheets and vorticity-based loads that are substantially faster with convergence on the loads and does not need potential sources to make the boundary conditions work. FlightStream® users do not have to come up with combination choices of sources and doublets to get a solution.

How is FlightStream® different from other panel codes?

FlightStream® uses surface vorticity sheets and vorticity-based loads whereas other traditional codes use surface pressure based loads and source-doublet combinations.

Support Documents & Downloads

Software License Pricing

Purchase includes CD, WibuKey and 12 Months Software Maintenance. Floating and Node Locked Licenses. Student License Pricing


Software Licensing

DARcorporation uses Wibu-Systems WibuKey copy protection for the FlightStream® licensing. The WibuKey concept consists of a WibuBox and the Wibu software. The WibuBox or WibuKey refers to the USB dongle that contains the software license. Our software needs the license to be present so that it will run. The Wibu software (or drivers) refers to the Wibu program that must be installed so that the computer can recognize WibuBoxes.

If a virtual server is intended to host the license, a USB-over-IP solution (such as AnywhereUSB hub by Digi that has been tested to work) will be required to plug in the WibuKey USB dongle and controlled by the virtual server on the same network.

FLOATING LICENSE: Software is accessible from multiple computers, but limited to the number of licenses purchased. The WibuKey does not need to be attached to the local computer where FlightStream® starts. All computers running FlightStream® must be able to access the license server.

NODE LOCKED LICENSE: (and using Floating License as Node Locked License): Follow installation instructions for floating license except that the WibuKey must be attached to the local computer where FlightStream® starts. Software then can be used on the computer the software is installed on.

Minimum requirements:

  • OS: Windows (64 bit) 7 and up
  • Free Hard-Disk Space: 100 MB (More space is required to save simulations)
  • RAM: 2-6 GB
  • Dual-core processors or better
  • Dedicated graphics card

Preferred requirements:

  • OS: Windows 7, 10 (64 Bit)
  • Free Hard-Disk Space: 1 GB (More space may be required to save large simulations)
  • RAM: 6-16 GB (Higher memory may be needed for large simulations)
  • Quad-core processors or higher for parallel scaling of the solver
  • Dedicated graphics hardware that has 3D capability, z-buffer etc.. Integrated graphics chipsets are not recommended.
Coming soon
Contact Us for software-related technical support
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  • 910 E 29th St, Lawrence, Kansas 66046-4926, USA