New: Runway info – touchdown & threshold

How precise are your landings?

We released an update to the Segment Info of approach segments.

In the landing screenshots on the right and below we can see at a glance:

  • The runway is depicted as a thick black line.
  • The pilot landed on EPPO RWY 28.
  • The touchdown was at 1506’. Till that point the runway is displayed to-scale.
  • The runway remaining was 6710’.
  • Over the threshold the aircraft (SR22T) was at MSL=346′ and airspeed of 86 KIAS.
  • The short approach was stabilized: on the glidepath, with stable airspeed.

To display the Segment Info of the Final we clicked the icon in the segment list. Note the runway depiction in thick line on the lower-right. Click the picture below for details. To check the airspeed and altitude over the threshold, we dragged the time crosshair to the runway threshold.

Along with the depiction of the runway, Segment Info graphs have been enhanced in these ways:

  • The x-axis along shows the distance from the runway threshold, or in the case of a missed approach the point at which the missed approach started.
  • The touchdown point is labeled with the distance from the threshold to touchdown, as well as the length of runway remaining after the touchdown.
  • The airport and runway number are shown just above the runway.

The accuracy of determining the location of the touchdown point depends on the data quality. An external GPS with good sky visibility will yield better accuracy than logging with your phone or tablet’s internal GPS. For best accuracy, import the flight data from your EFIS. See this.

2 comments on “New: Runway info – touchdown & threshold

  1. As to GPS accuracy: When I bought my first iPad, I believed what I’d been told. I was told that an external antenna would improve GPS accuracy. So I spent $100, bought a Bad Elf, and used it. First off, it was in the way, secondly, it deteriorated GPS accuracy. Fair to Good was the best that I could get. Removing it improved accuracy to Good to Excellent. I threw away the Bad Elf. Maybe others had better lick.

    • In my experience, Bad Elf is a great GPS and greatly enhances accuracy vs. an internal GPS. I’ve used several models, and they were all excellent. I have not used the one that connects directly to the iPad though. Maybe that’s the one you had bad experience with?

      The GPS should typically be placed/secured on the dash for optimum sky visibility. Seems to me that the external GPS that connects directly to the iPad may not have as good reception.

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