Sim Update 4 Beta (1.6.18.0) Release Notes - October 22, 2025

RELEASE NOTES Sim Update 4 Beta - 1.6.18.0

If you are playing on PC, outdated packages in your community folder may have an unexpected impact on the title’s performance and behavior.

If you suffer from stability issues or long loading times, move your community package(s) to another folder before relaunching the title.

New Content and Features

  • Added a helicopter vortex ring protection assistance

Stability & Performance

  • Adjusted triggers at which avionics are disabled when memory is getting low, and added notification message when doing so.
  • Fixed random crashes when animating Inverse Kinematics of 3D pilot (MSFS2020 packages only)

General Bug Fixes

  • Fixed frame rate being lower than it should when Max Frame Rate setting is in use
  • Fixed an issue where deleting a picture in the profile album would break the navigation
  • Fixed ATC messages not properly displayed when Windows active code page set to multi-bytes (ex: UTF-8, Shift-JIS)

Install, Performance & Graphics

  • Mitigated black patches on water

Aircraft

  • Added optional helicopter Vortex Ring State Protection assistance (see Settings menu). It automatically adjusts the collective to prevent entry into Vortex Ring State (VRS), which may occur during excessive descent at low airspeeds or while performing rapid deceleration (quick stops). For developers: see SDK for details.
  • Fixed helicopter rotor animation rotoscopic effect.

Boeing 737 MAX 8

  • Fixed missing text causing white square on Commercial Freelance Livery

Diamond DA62

  • Fixed wrong logo and missing text causing white square on Private 03 Adaptive Livery
  • Fixed missing glass over wing lights

Glass Cockpits

  • Fixed synthetic vision displaying only blue

Aircraft Tech

  • Fixed poor shadow quality and flickering when authored bounding sphere of aircraft did not match with geometry. The game now recomputes a bounding sphere containing only the visible meshes. LOD selection keeps the previous computation of the bounding sphere, and is not impacted.

Model Behavior

  • Fixed an issue that caused SimAttachments that were hidden due to their LoD to stop executing their ModelBehaviors even with the always_execute_model_behavior param set to 1

Aircraft Gameplay

Career

General Bug Fixes

  • Fixed rotorcraft flow when departure airport has a helipad and a runway but no parking spot

Missions

  • Fixed an issue that caused some missions to instant fail on start.

Familiarization Flight

  • Fixed “Fly to waypoint” objective not completing after a back-on-track

External HUD

  • Added support for cockpit.cfg parameters for the Helicopter Power HUD Gauge

Airports

  • Removed workers that end up moving in the plane’s path on small parkings

Fauna

  • Fixed fauna layer glitch when zooming on world map

Traffic

Air Traffic

  • Fixed issues in live traffic in airport

DevMode

Scenery Editor

  • Fixed grass flying above big slopes
  • Fixed crash in the profile editor when clicking outside the window

SimObject Editor

  • Updated system.cfg / electrical so a supplier or consumer can be provided with it’s name/id or config

SDK

  • Fixed an issue where legacy 2020 facility nearest and ident search JS APIs could return truncated 6+ char ICAOs that were incompatible with 2020 API consumers. These ICAOs are now properly omitted from the results.
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