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Hansaspeed

Why does the FO drain the outer tanks after landing SOP 2?

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For some reason, after landing whilst using SOP2, the FO almost always feels the need to press a button (Which one I have no clue. Guess I need to open that FCOM up one more time) to trigger the transfer of fuel from the 1 and 4 tanks to the 2 and 3 tanks. Why on Earth does this happen? I would rather NOT have my outer tanks drained, and my outboard engines made INOP.

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I'm not sure of the technical reason, but that's the way they do it at the airline we modeled in sop2.

 

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It's probably to do with needing to run the APU for a while. I'm pretty sure the 747-400 APU uses fuel from the No 2 tank.

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40 minutes ago, byork said:

I'm not sure of the technical reason, but that's the way they do it at the airline we modeled in sop2.

 

Doesn't this result in engines 1 and 4 failing from fuel starvation?

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As far as I know some airlines may wish to move the C of G forward for towing, loading and unloading of the aircraft. But most I think (including my airline) never transferred the fuel once parked and if they did the engineers moved the fuel around.

Freighters may need a more forward C of G for loading. (didn't fly freighter 74s)

 

IM

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21 minutes ago, Iceman2 said:

As far as I know some airlines may wish to move the C of G forward for towing, loading and unloading of the aircraft. But most I think (including my airline) never transferred the fuel once parked and if they did the engineers moved the fuel around.

Freighters may need a more forward C of G for loading. (didn't fly freighter 74s)

 

IM

Ah that would make a lot of sense. If I am not mistaken, doesn't that starve the outboard engines of fuel?

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37 minutes ago, Hansaspeed said:

Ah that would make a lot of sense. If I am not mistaken, doesn't that starve the outboard engines of fuel?

Fuel transfer is usually not done until engines are shut down at the gate.

However I have not heard of any company actually draining the fuel completely from the outer tanks. That can cause a few other issues.

Im assuming the SOPs that FS2Crew are using may transfer fuel after landing for C of G reasons but down to a minimum. Doubt if they would drain them completely. 

IM

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59 minutes ago, Iceman2 said:

Fuel transfer is usually not done until engines are shut down at the gate.

However I have not heard of any company actually draining the fuel completely from the outer tanks. That can cause a few other issues.

Im assuming the SOPs that FS2Crew are using may transfer fuel after landing for C of G reasons but down to a minimum. Doubt if they would drain them completely. 

IM

I hope this is the case! I'll see whenever I have a long taxi. If the tanks are totally drained I am pretty sure this is a bug

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1 hour ago, Hansaspeed said:

I hope this is the case! I'll see whenever I have a long taxi. If the tanks are totally drained I am pretty sure this is a bug

I see your point tho.

I haven’t noticed my FS2Crew FO doing that after landing, I’ll take a closer look. I only use the button version.

take care 

IM

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12 hours ago, Iceman2 said:

I see your point tho.

I haven’t noticed my FS2Crew FO doing that after landing, I’ll take a closer look. I only use the button version.

take care 

IM

You to. I think this is a SOP2 only thing.

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I think your FO may be either selling the fuel to supplement his FO wages, or he's distilling the alcohol from it. You wanna keep an eye on him. :biggrin:

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