by Steve Waite » Tue Jun 15, 2021 1:26 pm
I have found a line of code that got remarked in the PMDG AIRAC reader so it causes the reader to miss the SID exit waypoint and instead returns the first FIX in the table. That's now working OK in build 15 for the PMDG data, so with the current build 14, only the other AIRACS Ideal Flight uses work OK, AXE, Level-D, and iFly. Level-D and AXE more closely resemble the PMDG data so those can be used for the time being.
Anyway, that reminded me to relay a note about the Mission page Departure with "SID and IDF" and how the IDF (initial departure fix) is selected might appear odd:
Remember that usually, aircraft that use an AIRAC for navigation data, and when we need a plan with SID, that will only require that the route be found from the SID exit waypoint (usually a waypoint on an airway heading off to our destination). Since the SID will be selected in the FMC for departure, the waypoints in the SID are not added to the GPS plan as they might not all be true GPS waypoints we fly over.
Often in a SID (Standard Instrument Departure), there might not be an IDF because the first part of the climb might only include a heading out from the runway with no FIX associated with that part of the route.
However, on the Ideal Flight Mission page, we can select a departure plan "SID with IDF", perhaps we might want to see a waypoint directly out from our runway in the GPS plan. These are shown in the briefing route table and added to the GPS Plan. What Ideal Flight does is add the FAF (final approach fix) from the other end of our runway to guarantee we have a FIX waypoint that is directly off the end of our runway heading. So our Departure 26L will show an IDF fix of the FAF 08R.
For example, I just built flight plans using each of the four AIRACS from EGKK to LFPG where the route due to wind direction WNW, selected Runway 26L with SID HARD1X, and they all show FAF Fix EG CF08R as the IDF. It might seem odd to do that but this guarantees the fix is available in the AIRAC and is directly out from the runway in the proper heading. When using the stock GPS any AIRAC waypoints missing from the data are represented as User waypoints so they can appear in the GPS.
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