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Installation

Because of previous drama, this mod is distributed as an archive containing xdelta files and an install script. You will need an original, unmodded installation of the Aerosoft Twin Otter 1.1.1 (installed using Aerosoft One, the legacy Aerosoft installer, or by other means) so the installation process can read the original files and write the changed files to the mod folder. Your original files will not be modified.

Mod is distributed inert

Until the install script has been executed, the mod will be inactive.

You will still need to have the base model — the aerosoft-aircraft-twin-otter folder — in your Community/ folder for the mod to work.

Contents of the distributed archive

  • charliebravo-aircraftmod-twin-otter — this is all you need. You must unpack this to use the mod; the rest is optional.
  • charliebravo-soundmod-twin-otter-turbineduke — an optional sound mod. Requires that you own the Black Square Turbine Duke.
  • z_aerosoft-twin-otter_propblur_mod — an optional mod that makes props blurry when you're close.
  • z_aerosoft-twin-otter_flat_cameras — an optional mod that levels out the cockpit camera views (the close pilot view and the three captain's instrument views), instead of having them tilted down at the panel.
  • historic_ndb_userpoints.csv — can be imported in Little Navmap to show historic (decommissioned) NDB beacons.

Step by step

  1. Unpack directly into Community/, or wherever you keep your Community add-ons.
  2. Open the folder charliebravo-aircraftmod-twin-otter.
  3. Optionally, if you're paranoid or they are actually after you: examine install.bat and install.ps1, and overwrite the xdelta executable with a version you trust.
  4. Double-click install.bat.
  5. Follow the prompts and select an unmodified aerosoft-aircraft-twin-otter folder.

In a perfect world, the changes are applied and you end up with a working mod.

The sound mod

If you unpacked the soundmod:

  1. Open the folder charliebravo-soundmod-twin-otter.
  2. Double-click install.bat.
  3. Follow the prompts and select your bksq-aircraft-turbineduke folder.

Liveries

Legacy liveries for the Aerosoft model might work, if the loading order is carefully managed. Pink textures are supposedly fixed by using a layout generator tool to regenerate layout.json for MSFS2024.

If it goes wrong

Before you report an installation error, please try reinstalling a fresh copy of the Aerosoft Twin Otter and trying with that folder. If the error persists, please get in touch so we can figure out what's happening happen. The installer should work with all popular versions of v1.1.1.

Reviewed 2026-08-02.