Originally Posted by
sonicbum
Yes, but make sure You take into consideration negative Gs and the unbalance you will eventually create as a result of burning fuel only from one side. Have a look at answer.
The following is from the text:
At FL 300 +30 Minutes ( which is 44 minutes of EET ) you will switch OFF the X Feed and apply the gravity fuel feeding procedure . You can stay at FL 390 and the left tank will be on gravity. Which is in the middle of the paragraph and the way he writes it down, I think that he assumes 2 engine running at this point too.
Originally Posted by
sonicbum
Actually it is not your case. It would be your case if you had lost engine number 2.
Airbus wants to ensure that if you end up single engine without fuel pumps on the live engine side, you maximize the chances of feeding that engine.
Ok, so I will make another scenario from the beginning to tell me if now I have it correct in my mind. You climb and at FL200 you have the LO
PR on the left hand side again. In a ceo 320 your gravity ceiling is FL150. So you put your xfeed on, eng mode sel..ign, tk pump 1+2 off (the left ones). And on the right hand side we have 2000 kg. When the right hand engine has 100kg, you jump into the gravity fuel feeding, which states. If no fuel leak and with one engine running (fed by gravity):
fuel xfeed on, bank angle 1 wing down, rudder trim use. So the right hand engine will go off in a matter of minutes if not seconds and then you have only one engine left which is fed by gravity. correct?
Originally Posted by
sonicbum
Let me quote you a very good explanation from
vilas that uses the 2 things that as a pilot I like the most: fuel and beer!
Yes, I get the whole explanation, my question is something else? You need to have pumps working constantly for the deaeration to happen? Or if they even work for 1 minute and they give the initial force the whole process continue automatically because it only needs a trigger action.
PS: I am not allowed to use links, so I deleted them.