Sign in to follow this  
Marenostrum

wind speed and direction in cruise

Recommended Posts

on the display it is possible to see the wind direction/speed.

I know that it is a complicated an indirect calculation base on the informations derived by the meausing of the dynamic/static pressure/heading compared with the GPS measurements (to calculate groundspeed). The vectors analysys allows to know the wind direction/speed.

Now the question:

- What I see in the display is sometimes different (small difference) with the wind  direction/speed   readable on the FMC cruise page.

Why? Is it  a PMDG behaviour or does it happens also in in the real NGX?...is it due to a different source for the calculations?

Thank you.

WfydrZC.png

Share this post


Link to post
Share on other sites
Help AVSIM continue to serve you!
Please donate today!

I don't have the technical reason but yes, this is common across all the Boeings.  My guess is that the wind vector on the ND is a dampened value not prone to rapid movements about where as the FMS provides a more "instant" measurement or at least it does on PROG pg 2.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this