FSX only feeding from starboard tank

Pro Member Trainee
Tony (Laverda) Trainee

Has anyone else had this, and suddenly started feeding only from the starboard tank, not the center or port? Opening crossfeed or using pumps doesn't seem to make a difference, using auto refueling replenished the starboard tank and added the same amount to the port tank. Can't see any controls in A31 to correct this.

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Pro Member Captain
Ian Stephens (ianstephens) Captain
Ian Stephens is an expert on this topic. Read his bio here.

Hello there,

That's a rather curious situation you're finding yourself in with the fuel feeding only from the starboard tank. There could be a few factors at play here.

Firstly, let's look at the way fuel systems work in FSX (Microsoft Flight Simulator X). It tries to emulate real-world aviation systems to provide as authentic an experience as possible. Fuel systems in aircraft (especially large commercial ones like the A31) are complex, consisting of multiple fuel tanks and crossfeed options.

Crossfeed, in aviation terms, is the ability of one engine to draw fuel from the tank on the opposite side of the aircraft. It's often used when a fuel imbalance occurs (i.e., when one fuel tank has significantly more fuel than another). So theoretically, opening the crossfeed should address the issue.

However, in the world of flight simulation, things might not work as they would in a real aircraft. Flight Simulators often simplify certain systems and features for gameplay reasons or due to limitations in the simulation engine.

This could be a simple bug in the aircraft's fuel management system within the simulation, or it could be related to your specific aircraft configuration file (.cfg file). FSX, like other flight simulators, uses .cfg files to determine the behavior of aircraft, including the fuel system.

The good news is, you might be able to solve this issue yourself by checking and potentially modifying the .cfg file of your A31. You can find this file in the FSX's Aircraft folder (usually located in the SimObjects\Airplanes directory of your FSX installation).

Here's a basic step-by-step guide on what you could do:

  • First, backup your .cfg file. It's always good to have a backup in case something goes wrong.
  • Open the .cfg file with a text editor like Notepad.
  • Scroll down to the [fuel] section.
  • Check if there's an imbalance in the fuel tank capacities or the fuel flow scalar. The capacities should be balanced, and the flow scalar typically set to 1.0.
  • If you see any discrepancies, try adjusting the values to correct the imbalance.
  • Save your changes and restart FSX to see if the issue has been resolved.

Remember, it's always essential to back up your files before making changes. It will enable you to restore the original settings if the problem persists or other issues arise.

From my knowledge, the advice given could also be applied to newer platforms like the Microsoft Flight Simulator (2020 release) and X-Plane 12, considering they have similar configurations and mechanics.

If none of these steps work, there's a chance the issue could be related to a bug specific to the A31 model you're using. In that case, it may be worth reaching out to the developer or the community surrounding that particular model for more specific guidance.

Let's hope for smooth flying ahead! Please do report back if these solutions worked for you or if you need any further assistance.

Safe flights!

Pro Member Trainee
Tony (Laverda) Trainee

Thanks for that, I'll work through other aircraft - the Baron 58 is OK provided fuel is selected to crossfeed - and see if it's aircraft specific, then take a deep breath and dive into the .cfg files! 

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