Fuel Management Best Practices and an unimportand question

[Copper. 78]

Edit to my prev comment - 700kg (1543 lbs)

 

Glad i am understood. Hopefully you guys might induce this error between TOTALIZER and CALCULATED in your next update. During normal operations, with no leaks, they should not correlate 100% of the time, generally speaking, especially after a long mission. (Same can be said about the POS INIT page 3, all the drifts are 0. Usually there is some sort of error there).

 

If it interests others - I cross check and apply my own tolerances (I don't know what the real ones are):

Totalizer to calculated - less than +/- 2tonne (2204 lbs)

Totaliser to flight plan - less than +/- 1 tonne (1102 lbs)

Calculated to flight plan - less than +/- 1 tonne (1102 lbs)

 

I got the pfpx plan to be within 200kg/300kg (441/661 lbs) consistently of ngx burn.

 

I'm having trouble with the 747 plan due to special flight planning information. Still working on it.

 

I don't know what we can do about the ER for pfpx.

 

 

To the OP

 

I agree with Kyle.

 

Start by burning fuel from the trim tank, then the centre tank/s, then the inner wing tanks - in that order.

 

Once you have done all that, you will get the tank/engine feed EICAS message, at which stage you turn off the inner wing tank override/jettison pumps (fwd and aft override tank 2 and 3) AND open the un-guarded crossfeed valves.

 

Never touch the guarded crossfeed valves unless you have fuel problems to fix.

 

Yes, Lufthansa has toggle switches that are backwards, I think air France also likes to be backwards too ;P

[VHOJT 173]

Brian,

 

For the ER, this guy has made a 744ER data file for PFPX.  I haven't used it yet, so can't vouch for its accuracy.  I think Dan Downs said he used these profiles during beta testing.

 

http://forum.aerosoft.com/index.php?/files/file/3514-pfpx-boeing-747-400-performance-profiles-pack/

 

Cheers,

[downscc 1,327]

 

 

I think Dan Downs said he used these profiles during beta testing

 

Roger that..., be sure to set the fuel bias but that is good practices no matter which PFPX aircraft profile you use.

[Copper. 78]

Wonderful. Thanks boys!