Jump to content
Sign in to follow this  
Christopher Low


Recommended Posts

Please note that I am referring to the PMDG 737 NGX here (not the new NGXu version). I have noticed over the past couple of weeks that the autopilot seems to struggle slightly with a handful of SIDs in the UK. The two examples of this that I have seen recently are as follows....

  • DTY 4F departure from runway 33 at EGBB Birmingham
  • ORTAC 3A departure from runway 26 at EGJJ Jersey

The DTY 4F SID included a slight turn to the right, and then a 270 degree left turn loop. A bit further on, my plane decided to turn 90 degrees to the left, and then right again (on what should have been a direct course) prior to an (INTC) waypoint.

The ORTAC 3A SID included a 270 degree left turn loop (when I should have been turning roughly 90 degrees to the right), and then a full 360 degree left turn loop halfway to an (INTC) waypoint (which should have been direct).

Two rather anomalous departure tracks for no apparent reason. I find the initial 270 degree loops to be difficult to understand, and the 360 degree turn on a direct course is clearly not supposed to happen. Has anyone else experienced anything like this with the 737 NGX? Can anyone confirm whether there is a reason for these strange trajectories? The initial left turn loops during both SIDs were on the ND, but that 360 degree turn certainly was not. I have decided to avoid these two SIDs in future with the 737 NGX, and will restrict my departures to direct flights towards an NDB/VOR etc.

This is with P3Dv4.5HF2

Edited by Christopher Low

Christopher Low

UK2000 Beta Tester


Share this post

Link to post

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  
  • Tom Allensworth,
    Founder of AVSIM Online

  • Flight Simulation's Premier Resource!

    AVSIM is a free service to the flight simulation community. AVSIM is staffed completely by volunteers and all funds donated to AVSIM go directly back to supporting the community. Your donation here helps to pay our bandwidth costs, emergency funding, and other general costs that crop up from time to time. Thank you for your support!

    Click here for more information and to see all donations year to date.
  • Create New...