Dont u enter Winds Aloft in the Legs Data page?

That's what he's doing, yes:

For cruise I enter wind direction and speed on the ACT RTE DATA page for each waypoint.

KyleWhat a disaster. When I reset the altimeter from STD to 30.24 I was at about 270 kts and on the VNAV path according to the deviation scale on the ND. The descent rate went from 1700 FPM to 400 FPM and before I could get into VS I was already about a 1000 feet above the path. From about 16000 to 2600 it was speedbrakes all the way to Tampa to get the plane down to GS intercept altitude and speed. But this not unusual. Anytime the altimeter settings is a big difference from 29.92, VNAV is shot to hell.The setting at KLAS was 29.75. So when I press the STD button it goes to 29.75 and then I change it to 30.24. I wonder if the extreme variaton in settings could have any effect on VNAV peformance?Michael Cubine

Actually it is - the PLAN function on the PERF INIT page and the fuel prediction on the PROG page do exactly that. The FMC itself is the best fuel planner you'll ever find - an external program would have to be running the same code the FMC itself does to get it fully right. (this is what real life professional dispatch programs used at the airlines actually do)

Ryan, how difficult would it be for PMDG to create a utility based of the NGX's FMC code? It would great to have something to plug a route in and know how much fuel is needed without having to trial and error with the PROG page.

Ryan, how difficult would it be for PMDG to create a utility based of the NGX's FMC code? It would great to have something to plug a route in and know how much fuel is needed without having to trial and error with the PROG page.

+111111111111111111111111111111