Whats new?

28.01.2019 - Version 3.11 released

 

NEW FEATURE: First propulsion parameters (Engines and Propeller feature to come soon)

  • Additional plots for required thrust and performance as function of airspeed at a given altitude for steady horizontal flight.
  • Thrust and performance parameters are accessible as objective functions, and constraints for optimization and parameter studies

Misc:

  • Default penalty factors improved for different optimization constraints.

  • Increased resolution of carpet plots.

  • Default viscous drag coefficient changed to a more typical value, which can be used for most cases (at Reynolds numbers greater than 200 000)

 04.01.2019 - Version 3.10 released

 

NEW FEATURE: Model export to CAD

  • Allows easy geometry export to all major CAD systems, including CATIA, SolidWorks, NX and many more using the STL format.

Bugfix:

  • Undo/Redo bug fixed

Misc:

  • Additional constraints are available in the optimization. In particular, structural constraints on the root bending now enable the analysis of bell-shaped lift distributions and new configurations with proverse yaw.
  • Notification when updates are available
  • Updated libraries increase performance

 

18.11.2018 - Version 3.9 released

 

Misc:

  • Additional licence types are available, now also including a Free licence.
  • Updated in-app links to tutorials, store, and downloads due to a new website structure
  • Bugfix in airfoil import dialog

Results:

  • Values of design variables are shown as real values, not normalized

 

09.11.2018 - Version 3.8 released

  • Additional User hints in case of inconsistent bounds of design variables
  • 2D pressure distribution plots include the y position of the current strip

 

03.11.2018 - Version 3.7 released

 

NEW FEATURE: Parameter studies feature

  • Enables automatic screening of parameters and the impact on specific results. For example,  this feature can be used to understand the change of the static margin due to a change of the sweep angle.
  • Parameters include real and integer values, including geometry, discretization, computation settings etc.
  • Internal checks make sure that the setup is consistent
  • An additional results node provides access to the screening results. This is also true for optimizations.
  • Multiple parameters can be screened at the same time

Optimization:

  • More objective functions available
  • Design variables now also include flap angles

Discretization:

  • Number of panels per strip need not be even but may also be odd.
  • Strip-wise refinement option BOTH added. This increases the panel density at both extremities of a strip.

Geometry:

  • Different options for the definition of a section's chord length.

Airfoils:

  • Coordinates do not need to be normalized anymore.
  • The model can also be loaded when the required airfoil is not available in the airfoil catalog. In this case a dummy airfoil will be used (NACA0012)
  • The airfoil name is not case-sensitive in the xml file
  • Names may contain dots

User Settings:

  • Preferences dialog enables the definition of colors, sizes, arrow types etc.
  • User Settings are saved when closing the application and restored at the next start.

Bugfix:

  • Freshwater and Seawater models load properly

Misc:

  • Improved Error Handling allows to save the model before potential crash
  • Multi-threading accelerates start-up
  • White canvas background and larger font size
  • Improved result plots of strictly vertical wings (such as VTPs)
  • xml suffix removed from model name
  • Automatic logging of results in a text file
  • New aileron example accessible through the QuickStart menu
  • Additional checks and error messages when loading an xml file improve  debugging of manually created xml files

 

23.09.2018 - Version 3.6 released

 

NEW FEATURE: Flaps

  • Each airfoil provides an optional flap to easily model ailerons, elevons etc.

Bugfixes:

  • More robust error handling at start-up
  • Open File- dialog working properly when invoked multiple times
  • Anonymous bug reports can be sent

Misc:

  • Improved modelling of vertical wings (such as VTPs)
  • New performance plot Lift/Drag as a function of speed and altitude

 

15.09.2018 - Version 3.5 released

 

Airfoil catalog:

  • Added over 1000 airfoils to the built-in airfoil catalog
  • Airfoil import feature allows easy import of multiple airfoil files at the same time.
  • All airfoils in the catalog are accessible for inspection through a node in the Model Tree

 

02.09.2018 - Version 3.4 released

 

Flight condition:

  • new Fluids available (Seawater and Freshwater)
  • definition of additional fluid parameters
  • 2D plot of the lift coefficient and Mach number as a function of speed and altitude

Airfoil import:

  • Less strict format requirements allow different number formats, comment sections and different separators. As result, it is more compatible  with the traditional online database formats and enable direct import without a  need to tweak the airfoil files by hand.

Discretization:

  • Improved control of panel density through strip-wise definition of density and distribution.

Misc:

  • Minor bug fixes and other improvements

 

21.08.2018 - Version 3.3.1 released

 

Third-party libraries updated for stability and performance

Improved Windows Installer

 

 

12.08.2018 - Version 3.3 released

 

Easy access to the Quick-Start and User Guide, tutorials, and examples

through a Welcome Dialog at start-up, and a new QuickStart menu item

 

 

08.07.18 - Version 3.2 released

 

Licence check shows warning message when there is no internet connection.

 

 

03.06.2018 - Version 3.1 released 

 

Bugfix:

  • Nacelle feature stable
  • Toolbar icons path repaired

 

02.06.2018 - Version 3.0 released

 

NEW FEATURE: Multiple wings

  • Additional wings can be added to the model, such as tail planes, split flaps, biplanes, etc.
  • Unlimited number of additional, generic wings
  • All parameters of all wings are also accessible in the optimization
  • Individual wing designations and colors easy modelling

NEW FEATURE: Additional 3D plots

  • Surface velocity vectors
  • Center of pressure location
  • Aerodynamic center location
  • Global angle of attack
  • Reynolds number (strip-wise)

NEW FEATURE: Nacelle

  • Easy modelling of circular wings, such as engine nacelles or ring wings

Results:

  • Polar plot and aerodynamic coefficients of all wings, and of the entire aircraft, respectively.
  • Oswald factor added
  • Parameter designations improved

Blender:

  • Tapered blends for twist and chord using different options (Const.,Linear,Sin,1-Cos)

Computation:

  • Panel includes estimated memory requirement
  • Large models do not throw warnings anymore

Bugfixes:

  • Constraint violation penalty sign corresponds to goal type
  • Sweep variation in blends
  • And some more minor improvements

Misc:

  • Geometry panel shows the Wing's dependent parameters, such as wing area and mean aerodynamic chord
  • Model tree structure improved
  • Additional model checks including penetration of symmetry plane
  • New optimization algorithm CMA-ES implemented
  • Reference system node removed. The default reference area is the projected wing area and the reference length is the mean aerodynamic chord
  • Kernel update for improved stability and performance

 

25.03.2018 - Version 2.5 released

 

NEW FEATURES:

  • Blending dihedral changes (e.g. for smooth transitions to winglets)
  • Undo and Redo buttons available in the toolbar

Misc:

  • Solver selects Kernel according to Windows version
  • Numbered sections improve modelling

 

12.02.2018 - Version 2.4 released

 

NEW FEATURE: Constrained optimization

  • Constraints can be defined to avoid unfeasible designs. Available constraints include stability measures and the local lift coefficient.

Misc:

  • Optimization algorithm BOBYQA improved
  • Minor bugfixes

 

31.01.2018 - Version 2.3 released

 

This is the initial release of Aeolus Aero Sketch Pad.