PFPX Fuel Plan v 747v3 Actual Fuel Used

[Copper. 78]

Ok everyone, final post for this hopefully.

 

With the corrections previously posted respectively and individually inserted into PFPX FOR THE ER PAX ONLY, I've managed to get the arrival fuel discrepancy down to an acceptable level. I get to within 1tonne give or take 500kg which is tolerable.

 

My last two sectors

syd-hkg = +1200kg diff between planned and actual arrival fuel.

dfw-syd = +1100kg diff between planned and actual arrival fuel.

 

The dfw-syd took a whopping 16h27m flight time to cover a dist of 7547nm (not incl holding pattern distance), 16h47m gate to gate!! (20 mins spent in holding pattern at FL200).

 

How realistic!!!!! Thank you PMDG!

[VHOJT 165]

Excellent work!  Thanks for keeping us in the loop with your findings.

 

Cheers,

[KORDATC 80]

Thanks for your findings Brian. Dan, have you found a good bias value for the UAL PW 747s yet? On my flight from YSSY to KSFO yesterday, PFPX was estimating an arrival with 29000lbs left whereas after updating windsx the FMC was estimating over 40,000lbs and kept increasing slightly, before my sim crashed. The winds were fairly close to what PFPX was predicting as well. Just wondering if you or anyone else, have found the magic number yet?

 

Regards,

Rob

[downscc 1,327]

 

 

Dan, have you found a good bias value for the UAL PW 747s yet?

 

Been mostly flying GEs lately but now have a UAL B744 PW enroute EDDF KSFO and my PFPX bias is 1.3% and the destination fuel is remaining at plan 28 klbs.

[KORDATC 80]

Thanks Dan! I'll play around with it a bit. Will start with 1.3%.

[WarDog 6]

I did 2 flights so far

 

TLV-BLR-TLV both on the 400F PW, around 15.5H total time in the air.

Both flights used CI of 55 and AS16 and PFPX.

 

Both times landed at around 300-700 KG more then planed (including CONT' fuel).

[VHOJT 165]

Hi chaps,

For the 747-400 RR PAX and the RB211-524GH2 profile that comes with PFPX

After doing 12 bias calculations with PFPX at various weights on a number of flights, I have the following corrections to provide arriving at destination within +/ 500kg fuel remaining from planned and +/ 5 minutes of estimated time.  This is with Cost Index 100 - I haven't tried other CIs as yet.

Fuel Bias: -5.2%
Drag Factor: 1.0%

Cheers,

Rudy