Hi,
I know this has been raised before but I do feel that the fuel usage of the A310 is not very accurate and the FOB at arrival is quite a bit under at destination compared to the prediction from Simbrief.
As an example, I ran a flight from EGHH to LCPH using a Simbrief plan generated with the inibuilds provided airframe profile from this forum, freshly loaded for this flight. The Simbrief plan is attached as a PDF as are a few selected images from the flight of loadings from EFB, INIT, lined up for take off and on arrival to show the fuel on board.
A brief summary of the actuals from the flight and the EFOB from simbrief, all weights in KG:
at take off my FOB was 21.4 ... EFOB 21.2
at TOC the FOB was 19.0 ... EFOB 19.0
at TOD the FOB was 5.2 ... EFOB 5.6
on arrival the FOB was 3.7 ... EFOB 5.0
Climb usage is usually ok, cruise sees it burn a bit more than expected and descent sees it burn a lot more than expected. During descent I find an average of 2400KG/H which seems high considering the average in cruise is about 4000KG/H?
To confirm a few things:
- all weights at in KG
- I never paused the game in flight, which has been mentioned before
- Simbrief was calculated at M80 however the flight was run at M .78 by the AP on PROF and NAV all the way at the cruise of FL370 as imported from Simbrief
- I set a cost index of 40 as that is what is indicated in the tutorial videos but there is no helpful documentation on this in the manual provided with the A310
- the only manual flying was take off to about 1500ft before engaging AP and landing from 500ft after disconnecting the AP the rest was on NAV and PROF
- I compared winds during flight to those from Simbrief plan and all were in the same ball park and not hugely different
It would be interesting to get some feedback on this as the A310 is a great aircraft to fly but I always seem to be way short of EFOB in the range of 10-20% depending on the flight.
Cheers
Matt
EGHHLCPH_PDF_1674908937.pdf
