My head hurts, D.
I have no idea what simbrief uses. I was using different options, from a true GC track vs the direct line (basically a straight line on paper between the two ports.)
I should have downloaded them into FS9 and loaded them into the GPS and see if the distances are actually the same.
And that’s a good point using the direct to function as I’ve never done that using a long flight. I always go through simbrief.
Might be one to experiment with.
And yes very true, Rick.
I wonder though if the actual distance is longer with a Great Circle track then reality? I guess that’s my point. At what point in FS9 does it become shorter/longer?
Interesting on the flight yesterday. I used FSGRW for my winds, and based my departure of the real time in the early 70’s as far as the hour of the day. The simbrief winds were 3-4 hours ahead as it doesn’t do historical winds. The winds though were pretty much the same.
So everything matched up pretty well. I even stepped climbed before simbrief told me too. The time of the flight was slightly longer then planned and the fuel burn, which initially was slightly ahead, ended up being more by the end by nearly 10,000lbs.
So maybe that’s the answer? The routing north was TOO far north to be worthwhile in FS9.
At the end of the day, of course it doesn’t matter. But it’s one if you like to plan it well. Especially when fuel is tight on 10+ hour flights on something like a 747-100.
Maybe I’ll just add 10-15,000 lbs extra to counter the ‘longer’ distance.