Introduction to Falcon BMS Cockpit Customization

Falcon BMS (Benchmark Sims) is renowned for its depth and realism in simulation, offering pilots an unparalleled virtual experience of the F-16 Fighting Falcon. One of its most powerful features is the ability to customize cockpit layouts, allowing you to tailor instrument placement, add controls, and adapt the interface to your hardware and flying style. Whether you are building a new home cockpit, integrating additional monitors, or simply wanting a more efficient workflow for head-tracking or VR, understanding how to modify these layouts is essential. This expanded guide takes you through the entire process, from understanding the underlying file structure to applying advanced modifications. With careful preparation and patience, you can create a cockpit that enhances situational awareness, reduces workload, and brings your simulation to life.

Understanding the Cockpit Layout System

Overview of Configuration Files

Falcon BMS stores cockpit layout definitions in XML files located within the Data/Config directory of your BMS installation. The primary file is cockpit_layouts.xml, which contains the definitions for every cockpit element—from primary flight instruments (PFD, HSI) to caution panels, light modules, and interactive buttons. Additional files such as cockpit_layouts_bms.xml or user-created files may also be present, depending on your version and mods. Each element is defined by coordinates (x, y), dimensions (width, height), and a reference to the underlying 3D model or texture. Understanding this file’s structure is the first step toward making meaningful changes.

XML Structure Explained

XML entries follow a hierarchical pattern. A typical instrument definition looks like this:

<Instrument id="123" x="100" y="200" width="150" height="100" group="MFD">
  <Label>MFD Left</Label>
  <Drawable type="3D">...</Drawable>
</Instrument>

Key attributes include id (unique identifier), x and y (pixel coordinates on the 2D overlay), width and height (size of the interactive area or display), and group (logical grouping such as MFD, HUD, Caution). Some instruments are linked to 3D models that render inside the virtual cockpit; repositioning the 2D overlay may also affect where the model appears. Always inspect existing entries to learn the conventions before making changes. For a full schema reference, consult the official Falcon BMS documentation or the community wiki.

Preparing for Customization

Backup and Essential Tools

Before editing any file, create a complete backup of the Data/Config folder. A simple copy-paste to a safe location (e.g., a “BMS_Backup” folder) can save hours of recovery time. For editing XML, avoid using word processors like Microsoft Word; instead, use a plain text editor with syntax highlighting (Notepad++, Visual Studio Code, or even the humble Notepad). These tools help you avoid invisible formatting characters that can break the XML structure. You may also find XML validation tools useful—online validators or browser-based XML viewers can quickly catch missing closing tags or attribute errors.

Locating the Files

Navigate to your Falcon BMS installation directory—typically C:\Program Files (x86)\Falcon BMS 4.37\Data\Config (version numbers may vary). Inside, locate cockpit_layouts.xml. If you have installed mods or user-created layouts, additional XML files may be present. Make sure you edit the correct file. BMS loads layouts in a specific order; custom layouts are often placed in a separate User folder under Data/Config/User. Check the official BMS forum’s cockpit customization section for file organization best practices.

Detailed Step-by-Step Guide

Step 1: Accessing and Opening Layout Files

Open the main cockpit_layouts.xml file in your chosen editor. Spend a few minutes familiarizing yourself with the overall structure. Look for sections delineated by comments (e.g., <!-- Main Instrument Panel -->). You will see blocks for each instrument or group. To avoid breaking the file, never delete entire sections unless you know exactly what you are doing. Instead, comment out lines using <!-- ... --> to hide elements temporarily.

Step 2: Modifying Instrument Positions

Find the instrument you want to move by searching for its label or ID. For example, to reposition the Horizontal Situation Indicator (HSI), search for "HSI". Adjust the x and y attributes. Positive x moves the element to the right; positive y moves it down (screen coordinates). Be aware that the coordinate system may have an origin at the top-left of the virtual cockpit panel. After changing values, save the file. Launch BMS and load a mission to see the effect. If the instrument appears off-screen or overlapped, revert to backup values and adjust incrementally.

Tip: Many community members have published guides and example layouts that can serve as reference. Use these to understand coordinate ranges typical for your monitor resolution and aspect ratio.

Step 3: Adding New Controls

Adding a entirely new control requires inserting a new <Instrument> block. Study an existing entry for a button or toggle (e.g., an ICP key) and replicate its structure. Assign a unique id (if unsure, use an id not already present—you can find unused ids in community resources). Define the x, y, width, height and a Label. For clickable controls, ensure the Command or Function attribute references a valid cockpit callback (e.g., SIM_ICP_BUTTON_01). Test thoroughly; invalid commands can cause BMS to crash or the control to be non-functional. Always keep a backup of your working file before adding new entries.

Step 4: Saving and Applying Your Layout

After editing, save the XML file. Launch Falcon BMS and go to Setup --> Controllers --> Cockpit Layout (or similar menu path, depending on BMS version). You should see your modified layout listed. Select it and apply. Fly a quick mission to test all changed instruments and new controls. Open each display you repositioned; verify that clickspots align with buttons. If something is broken, check the BMS.log file (found in Data/Logs) for errors like “Invalid instrument ID” or “Failed to parse layout”. Correct any issues and reload.

Advanced Customization Techniques

Working with Cockpit Panels and Subpanels

Some layouts use grouping via the group attribute or nested <Panel> tags. You can define a panel that contains multiple instruments, allowing you to move an entire cluster (e.g., the entire front console) with a single change. For example, wrapping instruments in a <Panel id="FrontConsole" x="0" y="0"> enables relative positioning. This is especially useful for multi-monitor setups where you want to shift the entire left console to a secondary display. Study the cockpit_layouts.xml file for existing panel structures.

Integrating External Displays

Advanced users often export instruments (like the MFDs or the HSI) to separate windows on additional monitors. This is done through the BMS - Display Options menu, but the cockpit layout file can also define “export” regions. Look for attributes like export="1" or window="1" in instrument definitions. Setting these allows you to position an instrument on a secondary screen by assigning it to a specific window number. This technique is ideal for home cockpit builders who want physical button boxes or dedicated screens for each display.

Using Scripts for Automation

For repetitive tasks—such as repositioning dozens of instruments by a constant offset—use a scripting language like Python or PowerShell to parse and modify the XML programmatically. For instance, you can write a script that reads all instruments with a certain group and shifts them by +200 pixels on x. Always test the script on a copy of the file. The BMS community has shared several such scripts; search the forum for “batch move cockpit instruments” to find ready-to-use tools.

Common Issues and Troubleshooting

Overlapping Elements

If after moving instruments you find that buttons are unreachable or displays clip into each other, the coordinates likely overlap. Use a grid approach: note the typical instrument size (e.g., MFDs are roughly 300x300 pixels) and leave adequate padding. The XML coordinates are screen pixels; calculate positions manually—or better, use a visual editor tool like BMS Cockpit Layout Editor (third-party) to see placement in real time. If an instrument disappears, check if it has been moved outside the visible area (negative coordinates or values beyond your screen resolution).

XML Validation Errors

BMS will fail to load a layout with malformed XML. Common mistakes: missing closing tags, incorrect attribute syntax (e.g., using single quotes instead of double quotes), or stray characters. Use an XML validator (online validator) to check your file. The error log usually points to the line number of the problem. If the error is vague, compare your edited file against the original backup.

Layout Not Showing Up in Menu

If your custom layout does not appear in the cockpit selection menu, ensure that the file is placed in the correct directory and that the name attribute (or the file itself) is unique. Some versions of BMS require a separate .xml file with a specific naming convention, such as my_layout.xml placed in Data/Config/User. Check the forum for your specific BMS version.

Community Resources and Best Practices

The Falcon BMS community is an invaluable resource. The Cockpit Customization forum contains user-created layouts, tutorials, and answers to common questions. Many users share their cockpit_layouts.xml files for free—study them to understand different approaches. Best practices include:

  • Document your changes: Add comments in the XML to note what each modification does. This helps when updating BMS versions.
  • Use version control: Keep numbered backups (e.g., cockpit_layouts_v1.xml, v2.xml) so you can revert if a change goes wrong.
  • Test incrementally: Change one or two instruments at a time, then test. This isolates problems.
  • Share your work: Post your finished layouts on the forum to contribute to the community and get feedback.

Conclusion

Customizing the cockpit layout in Falcon BMS is a rewarding process that brings you closer to the real F-16 experience. By understanding the XML structure, methodically adjusting coordinates, and leveraging community knowledge, you can build a cockpit that perfectly complements your hardware and flying style. Remember to always back up your files, validate your XML, and test changes frequently. Whether you are moving a single gauge or creating an entire multi-monitor setup, these skills will serve you well as you continue to explore the depths of Falcon BMS. Happy customizing, and see you in the virtual skies.