Rotate MD-11: The Fuel System

Alex John
Monday, February 25, 2019

Some time ago, Rotate gave users a glimpse of their upcoming MD-11's electrical system. Today, they expand on this with previews of the fuel system, which is mostly complete.

The below image shows a 'normal start sequence':

Quoting developer cucoman on the update posted to

"All fuel tanks and relevant compartments have been modeled, and quantity, pressure and temperature of each of them is computed separately. All this data is processed in the custom Fuel System Controller, where logic for most of the sub-systems have been written to simulate most of the system's functions, including fuel scheduling, cross-feed, CG management, ballast fuel management, anti-ice re-circulation, tip transfer, fuel dump, abnormal operation. Manual mode, failures and electrical dependencies are also simulated.

"Below, shown in the screenshot, the system working with Tail Fuel Management mode active (left); the typical fuel schedule after climb, transferring the fuel from the tail forward (center); and the display during Dump mode (right)."

The following is a list of components that have been 'independently simulated':

  • All fuel tanks, including separate outboard and inboard wing compartments.
  • 18 fuel pumps.
  • 16 valves.
  • 5 manifolds.
  • 4 fuel feed valves.
  • Physical model for fuel flow and thermal behavior.
  • Automatic and manual modes.
  • Abnormal operation.

The first full exterior images of the MD-11 were released almost one year ago, with cockpit previews posted earlier on their website.

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