Tuesday, October 31, 2023

3DFoil is Wing Aerodynamics Made Easy 🙏

Why use 3DFoil 🤔

There are several reasons why you might use 3DFoil for wing analysis:

  • Accuracy: 3DFoil is known for its accuracy in predicting the lift, drag, and moments of 3D wings. This is due to its use of a novel numerical algorithm that couples the vortex lattice method with a linear strength panel method.
  • Speed: 3DFoil is a very fast software package, making it ideal for parametric studies and optimization.
  • Ease of use: 3DFoil has a user-friendly interface that makes it easy to set up and run simulations.
  • Affordability: 3DFoil is relatively affordable, making it a good option for students and hobbyists.

Here are some specific examples of when you might want to use 3DFoil:

  • To design a new wing for an aircraft or other vehicle
  • To analyze the performance of an existing wing design
  • To troubleshoot problems with an existing wing design
  • To optimize a wing design for a specific performance goal
  • To educate yourself about the principles of wing aerodynamics

If you are looking for an accurate, fast, and easy-to-use wing analysis software package, 3DFoil is a good option to consider.

Here are some additional benefits of using 3DFoil:

  • 3DFoil can be used to analyze wings with taper, twist, dihedral angles, and sweep.
  • 3DFoil can be used to analyze wings with multiple airfoils.
  • 3DFoil provides a variety of visualization options, including contour plots and graphs.
  • 3DFoil is actively developed and supported by Hanley Innovations.

Overall, 3DFoil is a good choice for wing analysis if you are looking for an accurate, fast, and easy-to-use software package.

More information about 3DFoil can be found at: https://www.hanleyinnovations.com/3dfoil.html

Monday, March 28, 2022

Aerodynamics of a golf ball

 Stallion 3D is an aerodynamics analysis software package that can be used to analyze golf balls in flight. The software runs on MS Windows 10 & 11 and can compute the lift, drag and moment coefficients to determine the trajectory.  The STL file, even with dimples, can be read directly into Stallion 3D for analysis.

What we learn from the aerodynamics:

  • The spinning golf ball produces lift and drag similar to an airplane wing
  • Trailing vortices can be seen at the "wing tips"
  • The extra lift helps the ball to travel further

Stallion 3D strengths are:

  • The built-in Reynolds Averaged Navier-Stokes equations provide high fidelity CFD solutions
  • The grid is generated automatically 
  • Built-in  menus are used to specify speed, angle, altitude and even spin
  • Built-in visualization
  • The numbers are generated to compute the trajectory of the ball
  • The software runs on your laptop or desktop under Windows 7, 10 and 11
More information about Stallion 3D can be found at https://www.hanleyinnovations.com
Thanks for reading 🙋

Wednesday, February 26, 2020

Accurate Aircraft Performance Predictions using Stallion 3D

Stallion 3D uses your CAD design to simulate the performance of your aircraft.  This enables you to verify your design and compute quantities such as cruise speed, power required and range at a given cruise altitude. Stallion 3D is used to optimize the design before moving forward with building and testing prototypes.

The table below shows the results of Stallion 3D around the cruise angles of attack of the Cessna 402c aircraft.  The CAD design can be obtained from the OpenVSP hangar.

The results were obtained by simulating 5 angles of attack in Stallion 3D on an ordinary laptop computer running MS Windows 10 .  Given the aircraft geometry and flight conditions, Stallion 3D computed the CL, CD, L/D and other aerodynamic quantities.  With this accurate aerodynamics results, the preliminary performance data such as cruise speed, power, range and endurance can be obtained.

Lift Coefficient versus Angle of Attack computed with Stallion 3D

Lift to Drag Ratio versus True Airspeed at 10,000 feet

Power Required versus True Airspeed at 10,000 feet

The Stallion 3D results shows good agreement with the published data for the Cessna 402.  For example, the cruse speed of the aircraft at 10,000 feet is around 140 knots. This coincides with the speed at the maximum L/D (best range) shown in the graph and table above.

 More information about Stallion 3D can be found at the following link.

About Hanley Innovations
Hanley Innovations is a pioneer in developing user friendly and accurate software that is accessible to engineers, designers and students.  For more information, please visit > http://www.hanleyinnovations.com

Saturday, February 8, 2020

5 Tips For Excellent Aerodynamic Analysis and Design

Stallion 3D analysis of Uber Elevate eCRM-100 model

Being the best aerodynamics engineer requires meticulous planning and execution.  Here are 5 steps you can following to start your journey to being one of the best aerodynamicist.

1.  Airfoils analysis (VisualFoil) - the wing will not be better than the airfoil. Start with the best airfoil for the design.

2.  Wing analysis (3Dfoil) - know the benefits/limits of taper, geometric & aerodynamic twist, dihedral angles, sweep, induced drag and aspect ratio.

3. Stability analysis (3Dfoil) - longitudinal & lateral static & dynamic stability analysis.  If the airplane is not stable, it might not fly (well).

4. High Lift (MultiElement Airfoils) - airfoil arrangements can do wonders for takeoff, climb, cruise and landing.

5. Analyze the whole arrangement (Stallion 3D) - this is the best information you will get until you flight test the design.

About Hanley Innovations
Hanley Innovations is a pioneer in developing user friendly and accurate software the is accessible to engineers, designs and students.  For more information, please visit > http://www.hanleyinnovations.com

Saturday, August 17, 2019

Accurate Aerodynamics with Stallion 3D

Stallion 3D is an extremely versatile tool for 3D aerodynamics simulations.  The software solves the 3D compressible Navier-Stokes equations using novel algorithms for grid generation, flow solutions and turbulence modeling. 

The proprietary grid generation and immersed boundary methods find objects arbitrarily placed in the flow field and then automatically place an accurate grid around them without user intervention. 

Stallion 3D algorithms are fine tuned to analyze invisid flow with minimal losses. The above figure shows the surface pressure of the BD-5 aircraft (obtained OpenVSP hangar) using the compressible Euler algorithm.

Stallion 3D solves the Reynolds Averaged Navier-Stokes (RANS) equations using a proprietary implementation of the k-epsilon turbulence model in conjunction with an accurate wall function approach.

Stallion 3D can be used to solve problems in aerodynamics about complex geometries in subsonic, transonic and supersonic flows.  The software computes and displays the lift, drag and moments for complex geometries in the STL file format.  Actuator disc (up to 100) can be added to simulate prop wash for propeller and VTOL/eVTOL aircraft analysis.

Stallion 3D is a versatile and easy-to-use software package for aerodynamic analysis.  It can be used for computing performance and stability (both static and dynamic) of aerial vehicles including drones, eVTOLs aircraft, light airplane and dragons (above graphics via Thingiverse).

More information about Stallion 3D can be found at:

Tuesday, July 18, 2017

Hanley Innovations Upgrades Stallion 3D to Version 5.0

The CAD for the King Air was obtained from Thingiverse

Stallion 3D is a 3D aerodynamics analysis software package developed by Dr. Patrick Hanley of Hanley Innovations in Ocala, FL. Starting with only the STL file, Stallion 3D is an all-in-one digital tool that rapidly validate conceptual and preliminary aerodynamic designs of aircraft, UAVs, hydrofoil and road vehicles.

  Version 5.0 has the following features:
  • Built-in automatic grid generation
  • Built-in 3D compressible Euler Solver for fast aerodynamics analysis.
  • Built-in 3D laminar Navier-Stokes solver
  • Built-in 3D Reynolds Averaged Navier-Stokes (RANS) solver
  • Multi-core flow solver processing on your Windows laptop or desktop using OpenMP
  • Inputs STL files for processing
  • Built-in wing/hydrofoil geometry creation tool
  • Enables stability derivative computation using quasi-steady rigid body rotation
  • Up to 100 actuator disc (RANS solver only) for simulating jets and prop wash
  • Reports the lift, drag and moment coefficients
  • Reports the lift, drag and moment magnitudes
  • Plots surface pressure, velocity, Mach number and temperatures
  • Produces 2-d plots of Cp and other quantities along constant coordinates line along the structure
The introductory price of Stallion 3D 5.0 is $3,495 for the yearly subscription or $8,000.  The software is also available in Lab and Class Packages.

 For more information, please visit http://www.hanleyinnovations.com/stallion3d.html or call us at (352) 261-3376.

Saturday, June 17, 2017

Airfoil Digitizer

Airfoil Digitizer is a software package for extracting airfoil data files from images. The software accepts images in the jpg, gif, bmp, png and tiff formats. Airfoil data can be exported as AutoCAD DXF files (line entities), UIUC airfoil database format and Hanley Innovations VisualFoil Format.

The following tutorial show how to use Airfoil Digitizer to obtain hard to find airfoil ordinates from pictures.

More information about the software can be found at the following url:

Thanks for reading.