Fuel Tanks on the BF 110

[ACE-OF-ACES]

Originally Posted by ZG15_FALKE

Just to put in some more confusion:
C4 and C7 switching logic should be:
°|°
°|° normal switching for use of main tanks, left engines fueled by left main tank and right engines out of right main tank.

°\°
°/° transfer from reserve tanks to left main tank

°/°
°/° transfer from reserve tanks to right main tank

°\°
°|° fueling both engines from left main tank, i.e. if right main tank is damaged

°/°
°|° fueling both engines from right main tank, i.e. if left main tank is damaged

Whether that is correctly simulated, we have to find out.

Cool!

A picture, even ascii, is worth a 1000 words! Thanks FALKE

[ATAG_Doc]

Originally Posted by ZG15_FALKE

Just to put in some more confusion:

There are eight fuel Pumps in a Bf110 C.

Two pumps per engine, which are engine-mounted and driven by the engine itself. These two pumps are operated by two units 'Brandhahn Armatur' which have three purposes: first to filter fuel from any polluntant, second they work as a deshydrator, third they operate as a fuel cock. These units are fuel-cock-wise operated by the two red-knobbed levers on the left of the pilot. The lever either closes both units (Brandhahn zu), opens unit one P1 (pump 1 can deliver fuel) unit 2 or both.
Brandhahnarmatur is 'A' in following picture

'B' is fuel line connector to engine driven fuel pump

So thats only 4 pumps, right!

The Bf110 has 4 fuel tanks, 2 in each wing. The forward tanks are maintanks which can feed the engines. The rear tanks are reserve tanks. To use the reserve tanks you have to use fuel out of the main tank first and then feed fuel to the main tank out of the reserve tank. (remember engines only can be fed from a main fuel tank!)
Even if one main tank is damaged both motors can be fed by one main tank. To this every fuel tank is equipped with one immersion fuel pump for transfer pumping purposes. The direction of transfer pumping is controlled by the two lever switch to the right of the pilot.
C4 and C7 switching logic should be:
°|°
°|° normal switching for use of main tanks, left engines fueled by left main tank and right engines out of right main tank.

°\°
°/° transfer from reserve tanks to left main tank

°/°
°/° transfer from reserve tanks to right main tank

°\°
°|° fueling both engines from left main tank, i.e. if right main tank is damaged

°/°
°|° fueling both engines from right main tank, i.e. if left main tank is damaged


Whether that is correctly simulated, we have to find out.

http://forum.1cpublishing.eu/showthread.php?t=27050

Bro you are an asset to the community. Thanks for this info it's a great help.

[ICU_DIE535]

Wow! What a great explaination thanks guys.

[ATAG_Keller]

So what's the consensus on this subject? Are the fuel tanks working properly and I just haven't figured out the right way to manage them, or are they modeled incorrectly?

[nadasero]

Originally Posted by Keller

So what's the consensus on this subject? Are the fuel tanks working properly and I just haven't figured out the right way to manage them, or are they modeled incorrectly?

I have done some tests. It apears that the fuel tanks are not working correctly.

Each Engine is using the fuel from its own main tank. I couldn't find a way to get fuel from the left main tank into the right engine.


°\°
°|° Normal situation. Both main tanks are used until empty.

°\°
°/° Left reserve tank pumping into left main tank (if not full)

°\°
°\° Right reserve tank pumping into left main (if not full)

°/°
°\° Bug: Right reserve pumping into left reserve

°/°
°/° Bug: Nothing happens (Left reserve pumping into itself?)

The right engine stops after the 350l are used up, no matter what. It is possible to fill up the left main tank, but it is not possible to get reserve-fuel into the right main tank. According to manuals I have seen, the red light from the reserve tanks should be switched on when the reserve tanks are empty.

If I remember this right, it was different befor the latest patch. I think the front switch was controling the usage of the main tanks.

[ATAG_Keller]

Originally Posted by nadasero

I have done some tests. It apears that the fuel tanks are not working correctly.

Each Engine is using the fuel from its own main tank. I couldn't find a way to get fuel from the left main tank into the right engine.


°\°
°|° Normal situation. Both main tanks are used until empty.

°\°
°/° Left reserve tank pumping into left main tank (if not full)

°\°
°\° Right reserve tank pumping into left main (if not full)

°/°
°\° Bug: Right reserve pumping into left reserve

°/°
°/° Bug: Nothing happens (Left reserve pumping into itself?)

The right engine stops after the 350l are used up, no matter what. It is possible to fill up the left main tank, but it is not possible to get reserve-fuel into the right main tank. According to manuals I have seen, the red light from the reserve tanks should be switched on when the reserve tanks are empty.

If I remember this right, it was different befor the latest patch. I think the front switch was controling the usage of the main tanks.

This is exactly what I had concluded. Can't wait for the fix so we can get more than 45 minutes of fly-time in a 110.


Prior to the last patch both engines fed simultaneously off of whichever tank you had selected.
Not that it matters now but it used to work like this. (Obviously historically incorrect but much simpler)

°\°
°|° Both Engines feed from front left.

°/°
°|° Both Engines feed from front right.

°|°
°/° Both Engines feed from rear left.

°|°
°\° Both Engines feed from rear right.

[Untamo]

°|°
°/° Both Engines feed from rear left.

°|°
°\° Both Engines feed from rear right.

Hmm.. how do you get the forward selector going straight up, I have only left/right selection in it, not both? The rear selector does have both though. Will have to test it this evening to make sure.

[ATAG_Keller]

Originally Posted by Untamo

Hmm.. how do you get the forward selector going straight up, I have only left/right selection in it, not both? The rear selector does have both though. Will have to test it this evening to make sure.

That's how it used to be pre patch, not anymore.

[IvanK]

Centre position of Feed tank selectors being looked at by Devs.

[I./Kg40_Night]