When I use ASE with flightplan it gives me an average and normally no problem at all. It doesn't when use flightsim speed x4.

In real life it could also vary when they get a dct wich leaves sometimes a lot of waypoints that you don't use, or you have to fly a lower altitude, avoiding weather etc etc. It still happends (sometimes) that a flight has to divert because they used more fuel than predicted.

 

 

It still happends (sometimes) that a flight has to divert because they used more fuel than predicted.

 

The biggest question is: can you arrive at destination with the required fuel?

 

At each waypoint you should always do waypoint checks:

 

* Position (where you are is where you think you are? VERY important when oceanic, but equally important at other times)

* Time (ETO/ATO)

* Distance (flight plan vs. computed, e.g. FMS)

* Fuel (burned/remaining/resv. avail)

* Winds (actual vs. forecast)

 

Depends which regulations you use, but EASA state that you must do waypoint checks at least once per hour. By performing these checks, you can see if you are good on fuel or not. If you are ahead of the flight plan, then great. If you are behind, you need to be looking at why.

 

Best regards,

Robin.

hello,

 

to help you a little.

 

PFPX is using the predictions contrary to AS using only actual and present and even if there is some differences the forecast is actually helpful as this is a projection .

 

in real ops there is always coms with dispatcher and corrections are made.

 

all the best.

 

Phil

In the past several days I made two flights from EDDF to KLAX (about 11 1/2 hours). The first flight had a headwind component of 35 knots per AS2012. The second flight had a headwind component of 17 knots. Both flights arrived at T/D within 2 minutes of ETA at T/C. I will need to admit this is very accurate and easy to enter into to the FMS. This comming from an advocate of entering winds by altitude and waypoints which can take up to 45 minutes to enter as opposed to entering /-35 or /-17 on the FL PLN INIT page 1.

 

Michael Cubine