Hi Vernon,

 

they are above the destination airport. Winds however don't change that much laterally within let's say a descend path of 80 miles (while they do change vertically). This is an approximation we're discussing anyway here and still preparing this in preflight may be inaccurate (if the leg is long). 

 

Of course there are exceptions (as in the case of very long STARs), in which case it still is best for this to be done manually based on raw data. Frankly though I think that the NGX FMC is very accurate in most cases (for short to medium flights) by just providing it the average winds in ASN briefing. 

+1 for Simbrief here. Fantastic free application and does this plus WAY more dispatch related tasks.

Posted Yesterday, 02:51 AM

Hi Vernon,

 

they are above the destination airport. Winds however don't change that much laterally within let's say a descend path of 80 miles (while they do change vertically). This is an approximation we're discussing anyway here and still preparing this in preflight may be inaccurate (if the leg is long). 

 

Of course there are exceptions (as in the case of very long STARs), in which case it still is best for this to be done manually based on raw data. Frankly though I think that the NGX FMC is very accurate in most cases (for short to medium flights) by just providing it the average winds in ASN briefing.

 

So its reported to about 80NM radius then? Is that the same for every waypoint? During preflight i always check my winds against PFPX cruise winds and descent winds and use PFPX if they match, most of the time they do but i always check.