Introduction

Installing the Heathrow Airport Add-on for Aerosimulations transforms your virtual cockpit into one of the world’s busiest international hubs. With highly detailed terminal structures, accurate runway markings, dynamic lighting, and realistic ground traffic, this add-on brings London Heathrow (EGLL) to life in your flight simulator. Whether you fly for leisure or practice airline procedures, a correct installation is essential to avoid performance issues, missing textures, or scenery conflicts. This guide provides a thorough, step-by-step walkthrough to help you get the add-on up and running smoothly, from download to final verification.

Prerequisites

Before you begin the installation, confirm that your system and software environment meet the necessary requirements. Skipping these checks can lead to crashes or a broken installation.

  • Aerosimulations Platform: Ensure you have Aerosimulations installed and updated to the latest version. The add-on is designed to integrate with the Aerosimulations scenery engine, which acts as a bridge between your simulator and third-party airports. You can verify your version in the Aerosimulations control panel.
  • Simulator Compatibility: Most Heathrow airport add-ons are built for Microsoft Flight Simulator (2020/2024), Prepar3D v4/v5, or FSX. Confirm which version you downloaded. If the add-on offers multiple installer flavors, select the one matching your simulation platform.
  • System Requirements: A complex airport like Heathrow demands resources. Minimum requirements typically include a quad-core CPU, 8 GB RAM, a DirectX 11-compatible GPU with 2 GB VRAM, and 15 GB of free disk space. For ultra settings or high-resolution texture packs, 16 GB RAM and 4 GB VRAM are recommended. Check your hardware against a free online tool like System Requirements Lab before proceeding.
  • Administrator Permissions: Many steps require writing to protected folders (e.g., C:\Program Files). Ensure your Windows user account has administrator rights, or right-click installer executables and select “Run as administrator.”
  • Antivirus Exceptions: Some security software may quarantine installer files or prevent the add-on from writing necessary configuration files. Temporarily disable real-time scanning or add your Aerosimulations directory as an exception.

Step 1: Download the Heathrow Airport Add-on

Obtain the add-on exclusively from the official Aerosimulations website or an authorized reseller such as Simmarket or Aerosoft. Avoid third-party download sites to minimize risk of corrupted files or malware.

  1. Open your web browser and navigate to the Heathrow Airport add-on product page.
  2. Select the correct version for your simulator platform. If in doubt, refer to the product description—many add-ons now support cross-platform installations through the Aerosimulations ecosystem.
  3. Click the download button and choose a location on your computer you can easily find later, such as your Downloads folder or a dedicated Flight Sim Add-ons directory.
  4. Note the file size displayed on the website. After download, compare the actual file size to verify completeness. For large archives (often 5–15 GB), consider using a download manager that supports resume in case of interruptions.

If the download comes in a compressed format (ZIP, RAR, or 7z), proceed to Step 2. Some vendors provide a standalone installer executable (e.g., Heathrow_Aerosimulations_Setup.exe), which allows you to skip directly to Step 4.

Step 2: Extract the Files

Compressed archives require extraction before installation. Use a reliable extraction tool such as 7-Zip (free) or WinRAR.

  1. Right‑click the downloaded archive file and select Extract All (Windows built‑in) or use your archive program’s context menu (e.g., 7-Zip > Extract files…).
  2. Choose a destination folder that is easy to remember—for instance, a subfolder named Heathrow_Addon inside your Downloads directory.
  3. Wait for extraction to complete. Verify that the folder now contains a set of files: commonly a subfolder named Heathrow, a configuration file (Add-on.xml or add-on.ini), texture sets, and possibly an installer executable (setup.exe).
  4. Some add-ons are protected by a password. If the archive requires one, check your purchase confirmation email or the product page for the provided password. Do not attempt to extract with brute‑force tools—it will corrupt the files.

If you see only one large .exe inside the archive, you are dealing with a self‑extracting archive. Double‑click it and follow the on‑screen prompts; this effectively replaces steps 3 and 4.

Step 3: Locate Your Aerosimulations Directory

The Heathrow add‑on must be placed inside the correct Aerosimulations folder structure. The exact location depends on your simulator platform and where you installed Aerosimulations.

  • Default path for Prepar3D / FSX with Aerosimulations: C:\Program Files\Lockheed Martin\Prepar3D v5\Aerosimulations\Add-ons or C:\Program Files (x86)\Microsoft Games\Microsoft Flight Simulator X\Aerosimulations\Add-ons
  • Microsoft Flight Simulator 2020/2024 with Aerosimulations: C:\Users\[YourUsername]\AppData\Local\Packages\Microsoft.FlightSimulator_8wekyb3d8bbwe\LocalCache\Packages\Aerosimulations\Add-ons (if using the Community folder method, the add‑on is placed directly in Community\aerosimulations-heathrow)
  • Standalone Aerosimulations manager (if installed outside a sim folder): C:\Program Files\Aerosimulations\Add-ons (or wherever you chose during initial installation)

If you cannot locate the folder, open the Aerosimulations application and look for a “Settings” or “System Information” panel that displays the repository path. Alternatively, search your entire drive for a folder named Add-ons that contains a readme.txt from Aerosimulations.

It’s wise to create a manual backup of your Add-ons folder before copying new content, in case you need to revert.

Step 4: Install the Add‑on

Installation method varies based on the files you extracted. Follow the appropriate sub‑section below.

Manual Copy (no installer included)

  1. Open two file‑manager windows side‑by‑side. Left side: your extracted Heathrow folder. Right side: the Aerosimulations Add-ons directory.
  2. Drag the entire Heathrow folder (e.g., heathrow_egll_v2) into the Add-ons folder. Do not place individual files directly into the Add‑ons root—the folder structure matters.
  3. If prompted about merging folders, choose “Yes” or “Replace files.”
  4. Some add‑ons require additional library files placed into the Aerosimulations root or the simulator’s main directory. Check readme for any post‑copy instructions.

Using an Installer (setup.exe)

  1. Right‑click the setup.exe file and select Run as administrator. This prevents permission errors when writing to protected paths.
  2. Follow the installer wizard. When prompted, browse to select the Aerosimulations installation folder (the wizard may auto‑detect it).
  3. Choose between “Full” and “Performance” texture versions if offered. Full provides maximum fidelity; Performance reduces texture resolution for better frame rates on mid‑range hardware.
  4. Let the installer copy files and register the add‑on. Do not interrupt the process. Once finished, a confirmation message appears.

After either method, open the Aerosimulations control panel—it should automatically detect the new Heathrow entry. If not, proceed to manual activation in Step 5.

Step 5: Activate the Add‑on

Even after files are placed, the add‑on must be enabled within the Aerosimulations ecosystem and often within your simulator.

  • In Aerosimulations Manager: Launch Aerosimulations. Go to the Add‑ons Manager tab. Locate “Heathrow Airport (EGLL)” in the list. Check the box next to it to enable. Some versions require you to click “Apply” or “Reload Scenery Library.”
  • In Simulator Settings (if applicable): For Prepar3D or FSX, launch the sim, open Options > Scenery Library, and ensure the Heathrow entry appears and is checked. If it does not appear, click “Add Area” and browse to the Heathrow folder inside the Add‑ons directory. For MSFS, the package is automatically added when placed in the Community folder; no additional activation is needed.
  • Configuration Files: If the add‑on uses Add-on.xml, no further action is required after a sim restart. Should the airport fail to show, open that XML in a text editor and verify the Path attribute points to the correct folder location.

Step 6: Verify the Installation

Test that Heathrow loads correctly and performs as expected.

  1. Launch your simulator and select Heathrow Airport (EGLL) as departure or arrival. Choose a gate and a time of day that matches your lighting preference.
  2. Wait for the scenery to fully load. Look for key landmarks: Terminal 5, the control tower, runway 27L/09R markings, and the nearby motorway junction. If any buildings appear as grey blocks or missing, textures have not loaded.
  3. Check frame rates while panning around the airport. A successful installation should maintain playable performance similar to other complex add‑ons.
  4. Enable ground traffic and jetways—if included—to confirm dynamic elements function. Interact with a gate to see if the jetway connects.

Troubleshooting Common Issues

  • Airport does not appear: Revisit the Add‑on Manager in Aerosimulations and verify the entry is toggled on. Also ensure the folder is in the correct location—many users accidentally place the airport folder inside another subfolder.
  • Black / missing textures: Corrupted download or incomplete extraction. Delete the extracted folder, re‑download the archive, and re‑extract. Also try running the simulator as Administrator once to let it write necessary cache files.
  • Performance stutters: Switch to a lower texture resolution if the installer provided that option. You can also disable dynamic lighting or reduce AI traffic temporarily to isolate the issue.
  • Conflict with other Heathrow sceneries: Only one Heathrow add‑on should be active at a time. Deactivate or remove any older or default airport‑enhancement packages (e.g., Orbx Vector or default EGLL).
  • Scenery loading errors in log: Check the simulator’s log file (e.g., Prepar3D.log or Content.xml) for error lines mentioning “Heathrow.” Often these point to missing dependencies like SODE or GSX; install those as needed.

For persistent problems, visit the Aerosimulations support forum and search for known fixes, or post detailed logs along with your system specs.

Conclusion

With the Heathrow Airport Add‑on successfully installed, your virtual airline operations and general aviation sightseeing will gain a new level of realism. Accurate taxiway signage, detailed terminal interiors, and the bustling apron recreate the atmosphere of London’s primary hub. Remember to keep both Aerosimulations and the add‑on updated—developers often release patches for new simulator‑version compatibility and scenery improvements. Back up your Add‑ons folder periodically, especially before major simulator updates. Enjoy your flights from EGLL, and safe skies.