DC-3 Aux tanks not feeding the engine

Are you using Developer Mode or made changes in it?

No

Have you disabled/removed all your mods and addons?

Yes

Brief description of the issue:

Switching to the AUX tanks kills the engines. Aux tanks show empty in the cockpit gauges, but full in MSFS/SimConnect.

Detailed steps to reproduce the issue encountered:

  1. Start the engines as per POH/ manual.
  2. Switch the Left tank to feed from Left AUX.
  3. Observe the engine stopping.

Build Version # when you first started experiencing this issue:

40th anniversary edition initial release.


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Do you have the same issue if you follow the OP’s steps to reproduce it?

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Do you have the same issue if you follow the OP’s steps to reproduce it?

Yes. Exactly!

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I have even tried the “CD” switch to try and get it to work right. (With NO success)

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Do you have the same issue if you follow the OP’s steps to reproduce it?

exaxct same problem

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weight and fuel manager say aux tanks are full but when selected on the plane it shows they are empty and engines die. Tried uninstalling and reinstalling the plane and restarting the game multiple times and nothing worked.

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Do you have the same issue if you follow the OP’s steps to reproduce it?

Exact same issue

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Doesn’t matter if you use the boost pumps or not - engine die.

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Do you have the same issue if you follow the OP’s steps to reproduce it?

YES

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AUX tanks are non functional. Main selector set to either AUX tanks, booster pumps ON, Fuel Mixture Rich. No Fuel pressure and no fuel quantity when fuel gauge is set to AUX tanks.

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Do you have the same issue if you follow the OP’s steps to reproduce it?

yes, i found this bug page searching for this exact issue

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seems to happen on both refit and old school liveries

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Exactly same. Aux tanks unusable, therefore 40% less range. Almost crashed and had to make emergency landing with engines off :slight_smile:

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The Enhanced version overrides the flight model.cfg with wrong tank names Aux Right and Aux left. Rename them to Center1 and Center2. Presto.

9 Likes

DC3 The auxiliary oil tank of DC3 seems to be unavailable.

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The fuel crossover switch is stuck on off also.

Not all DC-3s had x-flow. This one doesn’t as per manual.

Works like a charm!

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Do you have the same issue if you follow the OP’s steps to reproduce it?

yes

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suffered pre-mature fuel exhaustion. Switched to auxiliary and tanks were empty despite showing full in the weights and balance.

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Do you have the same issue if you follow the OP’s steps to reproduce it?

YES
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On one occassion that I couldn’t repeat AUX TANKs started to feed the engines BUT the indications on the valve was over the MAIN TANKs
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Sorry none…

AUX tank usage with enhanced version Is fixed with this mod Duckworks DC-3 Improvement Mod » Microsoft Flight Simulator

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I would for sure use this also as I am having the same issue.

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Yes

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Pretty much all the time I can’t get them to work

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None

Do you have the same issue if you follow the OP’s steps to reproduce it?

Yes, the Aux fuel isn’t working.

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Adding fuel to the Aux tanks doesn’t show in the DC-3, when you switch from main tank to Aux, the engine shuts down.

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Do you have the same issue if you follow the OP’s steps to reproduce it?

Yes

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What is extra strange is if you run out of fuel in a tank while in flight, switching tanks doesn’t get the engine restarted even though the unfeathered propeller is windmilling. Note, too, that the oil pressure will read zero even though the unfeathered propeller is windmilling. That is not how mechanical oil pumps driven by engine rotation work!

What is extra crazy, is you have to use the engines’ electric starters to restart the engines, while in-flight after the change to auxiliary tanks, even though the unfeathered propellers are windmilling. Windmilling means the engine is turning, which means positive oil pressure and positive fuel pressure due to mechanical pumps being driven (barring any mechanical failures, but we’re talking about simple fuel exhaustion and switching to alternate tanks here).

There is far more to this issue than the engines dying when the tank selector switches are changed to an alternate tank.

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Do you have the same issue if you follow the OP’s steps to reproduce it?

Yes

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I set up my aircraft will full main and aux tanks, loaded into the sim, began the start procedure. Upon cycling my fuel guages, I noticed the aux tanks read as empty. I called the fuel truck, fuel truck reported aux tanks were full. I then checked the fuel loadout in the custom bar, same thing, full aux tanks. Which I thought was odd, since I could have sworn I was running the aux tanks just fine a few weeks ago.

It then dawned on me, I recently installed the DC3-Enhanced pack, where I noticed very different flight characteristics than from stock. So I decided to test and see if uninstalling the DC3-Enchanced pack would fix this issue. And yes, yes it does.

There appears to be an error somewhere in your DC3-Enhanced pack, that fails to register that the aux tanks have fuel. Reverting to the stock DC3 is a temp fix, until this is patched.

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I have had this problem since the DC3 was first introduced, have tried all different methods to alleviate the problem, nothing works. Also the left tank shows in the off position at the start, but once it is moved to left main it can’t be moved back to the off position any other position is ok. I can only assume it’s bugged considering the response on the subject.

1 Like