Fly the Maddog X 1.5b476 Open Beta Released

Leonardo Software House has released a new open beta update for Fly the Maddog X – 64-bit (P3D V4.4/4.5). The update is designated 1.5b476 – according to Stefano, features include “…the Canadian Marconi CMS-900 coupled with the PMS, along with a bunch of new cockpit customizations plus a series of improvements and fixes, that range from the addition of some new sounds to the improved GSX Level 2 integration (now making full use of the new features available).”

Shortly thereafter, Stefano continues, “If you own the MD-83 & MD-88 variants expansion you are now free to choose any of the 3 engine types for each airframe.”

Check out some release images below.

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Next, an update changelog.


******1.5b476 – 07/09/2019******

64bit edition – P3D v4.4/v4.5/v4.5HF1




  • added Canadian Marconi CMS-900 and PMS systems;
  • added new cockpit customizations in ‘Airliner Options’ (check ‘Fly the Maddog X User Manual.pdf’ – page 9);
  • added mouse acceleration (if enabled in load manager) to VHF freq decimals in 8.33KHz mode;
  • added clock settings (except chr buttons) to the CM1/CM2 sync option;


  • when MD-83 & MD-88 variants is installed, added the possibility to select -219 engine type for the MD-82 and -217A/-217C for the MD-83/MD-88 (TRC settings and performances will change accordingly);
  • removed NO-PBR model option;


  • added sound for auto/manual press lever and manual press wheel movement;
  • added sound for spoiler extended in flight;
  • added slat aerodynamic sound;
  • all cockpit sounds now located in the aircraft sound folder;


  • Operation Manuals revision ‘Vol II chapter 6 – conditional procedures’, to include CMS900+PMS reference;
  • ‘Quick Guide and ‘User Manual’ revision.



  • minor bug fixes;
  • revised flight dynamics;
  • improved LOC CAP logic;
  • fixed and improved GSX/GSX Level 2 integration;


  • improved engine spoolup timing and sound sync;


  • fine tuning of VC objects dimensions and position.

The official stable version is expected in a couple of weeks.

To review the complete update announcement, see the source post via the developers ‘News and updates’ forum. Alternatively, for more information about Fly the Maddog X, visit the product website.

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