Changelog 3.6

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Revision as of 20:21, 18 September 2015 by Stuart (talk | contribs) (Remove sun effects, which are post-3.6, add tree shadows which were post-3.4)
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This changelog is a draft.

This changelog is currently being written for the FlightGear v3.6 release. Feel free to help! If you are aware of any FlightGear related changes, please add them to the changelog.

Cquote1.png As many people have noticed, the v3.6 release has been slightly delayed. The main reason is that too many key developers have been out of town for work or holiday this month. We are currently hoping for a mid-September release. We will post further updates once our release manager returns and we can regroup from all the end of the summer (northern hemisphere) :-) activities.

Thank you,


— Curtis Olson (Aug 26th, 2015). [Flightgear-devel] Release v3.6 update.
(powered by Instant-Cquotes)

The FlightGear development team is delighted to announce the v3.6 release of FlightGear, the free, open-source flight simulator. This new version contains many exciting new features, enhancements and bug fixes. Highlights in this release include a reduced base installation size, integrated Qt launcher, improvements to the built-in web UI, cockpit shadows without Rembrandt, and massive improvements to the Cessna 172P.

Founded in 1997, FlightGear is developed by a worldwide group of volunteers, brought together by a shared ambition to create the most realistic flight simulator possible that is free to use, modify and distribute. FlightGear is used all over the world by desktop flight simulator enthusiasts, for research in universities and for interactive exhibits in museums.

FlightGear features more than 400 aircraft, a worldwide scenery database, a multiplayer environment, detailed sky modelling, a flexible and open aircraft modelling system, varied networking options, multiple display support, a powerful scripting language and an open architecture. Best of all, being open-source, the simulator is owned by the community and everyone is encouraged to contribute.

Download FlightGear v3.6 for free from

FlightGear – Fly Free!

Major enhancements in this release

Project Organization


  • Numerous improvements to Phi, the built-in web interface.
  • Interactive traffic system re-enabled, having been disabled by mistake some releases previously.
  • Various security improvements, including the disabling of system.fgfsrc.


The aircraft page of the Qt launcher for FlightGear 3.5 as rendered on Windows 7.

The built-in Qt launcher, is available for all of FlightGear's supported operating systems.

Aircraft Modeling

  • Tooltips can now be positioned at a specific place on-screen.
  • wing flex module added, controllable via Nasal or Property Rules.
  • Bug-fixes and improvements to the Failure Manager.
  • <variant-of> tag in the *-set.xml file has been added. See FlightGear Newsletter March 2015.
  • Automatic checklist execution, which can, for example, be used for autostart.
  • 8.33 kHz spacing is now supported on comms radios.


  • Sync with latest version of JSBSim.
  • The pitot angle can now be tweaked with the <pitot_angle> tag in the <metrics> block.
  • The refuel rate is now configurable with the <refuel-rate> tag in the <propulsion> block.

Atmospheric Light Scattering

  • The addition of 3D grass to the random vegetation system.
  • Tree shadows
  • Interior cockpit shadows.
  • Interior glass reflections, frosting and fogging.
  • Interior panel backlighting.
  • New thruster effect (can be used for afterburners flames, rockets, etc.).


  • Many improvements to Phi, the built-in web interface.
  • GUI cleanup to improve support for multiple GUI styles.


  • Regional texture definitions for Florida, Brazil, Latin America, Africa, Middle East and Southeastern Asia.
  • stgmerge tool added to merge objects in a scenery tile into a smaller number of meshes.

Highlighted new and improved aircraft


Bug fixes

  • See our bugtracker for an extensive, yet incomplete, list of the bugs fixed in this release.