Landing – Segment Info improved

The “land” segment (created by CloudAhoy’s auto segmentation) is short in time but crucially important for evaluating the quality of the landing, especially in cases of incident investigation.

In our latest release we improved the Segment Info of the “land” segment (working with a customer who was investigation an incident – thank you!).

The Segment Info of the “land” segment is especially valuable if the flight was logged with an EFIS, for example imported from Garmin G1000, because the data includes Pitch and Normal Acceleration data (G) – in addition to the IAS which is always available with CloudAhoy.

A story told in three graphs
The screenshot below is of C172 flight imported from Garmin G1000. By clicking the  icon on the “land” segment, we get three graphs of the landing segment: IAS (top graph), Pitch, and Normal Acceleration (bottom). Note the brown landing segment in the 2D view (bottom right). The graphs tell a story:


  • The graphs’ crosshair indicates the exact time of touchdown, when the G was at a minimum.
  • The magnitude of the G graph at touchdown indicates an acceptable landing: neither a “greaser” nor a hard landing.
  • The plane touched down at 5-6° pitch; only the two main wheels touched the ground.
  • After the initial touchdown, the pitch gradually decreased to 0° in about 4 seconds. Note the G graph when the pitch reached 0°: it shows the nose wheel touching the ground, and doing it softly.
  • Zooming on the 2D view, the pilot touched down and remained on the centerline.

The information is especially valuable for analyzing hard landings and porpoising:

  • In hard landings, you will see a sharp spike in the Normal Acceleration (G) graph.
  • In porpoising, you will see fluctuations in the pitch attitude, as well as positive and negative spikes in the Normal Acceleration. The minima indicate touchdowns, and the maxima mark the top of the bounce.

If Normal Acceleration and Pitch are not available, we display only the IAS graph.

Debrief instrument approaches flown with ForeFlight

New: when you import a flight from ForeFlight, CloudAhoy will now automatically display the instrument approach flown, if any.

In addition to the instrument approach, CloudAhoy already imported from ForeFlight the entire flight plan. Both are now shown in magenta.

Note that you can always manually add additional instrument approaches.

The picture above shows an example of IFR flight: KPWM > KASH > KBED

Flight planning:
– The pilot was using ForeFlight and entered the IFR flight plan KPWM > KASH.

In the cockpit:
– ATC assigned RNAV (GPS) RWY 32 at KASH, with vectors to final. The pilot added the procedure.

After landing:
– the pilot imported the flight to CloudAhoy.
– When debriefing the flight for the first time, the RNAV approach is automatically shown in CloudAhoy as well as the entire flight plan, both are shown in magenta.


CDI display in cockpit view

If you import your flights from Garmin G1000, your can now view the horizontal and vertical CDIs on CloudAhoy’s glass cockpit gauges. It is useful for debriefing the accuracy of your navigation, and specifically your flying of instrument approaches.

The screenshot below shows the short final of an ILS approach. The horizontal CDI is centered (i.e., the aircraft is on the runway’s extended center line), and the vertical CDI shows the aircraft above the glide slope.

Note that if you fly a non-precision approach, then the vertical CDI will not be displayed. Also, the horizontal and vertical CDIs are not displayed when there is more than full-scale deflection.



Flight graphs: new and enhanced

Flight graphs have always been an important tool for CloudAhoy debriefing. CloudAhoy can display graphs of selected parameters, and you can display graphs for the entire flight or only for selected segments. For example, you can display the altitude and airspeed of one decluttered traffic pattern out of many.

We redesigned the graphs:

  • It is now easier to correlate the flight segments the points of a graph,
  • We added multi-value temperature graphs – very useful for engine monitoring.

Reminder: graphs are displayed by clicking or tapping the menu icon  on “Flight Graphs”, or on a Segment Info icon .

When you display a graph from Flight Graphs, you can undock it , move it and resize. You can display a graph for the entire flight, or only for selected segments. More information here.

Using Graphs
Consider the cross-country flight in the debrief window below.

When debriefing, probably the two most useful graphs are the altitude and airspeed. You could display them separately, in two graph windows, or select a combined “ALT+IAS” graph. We selected “ALT+IAS”.

In this specific case, the aircraft (SR22T) was new, and we wanted to check the cylinder head temperatures. CloudAhoy now support multi-value graphs of CHT and EGT, and we selected “CHT 1..6”. CHT information is available when importing the flight from an EFIS such as, in this case, Garmin Perspective.

Below we will explore the new look of these graphs.

IMPROVED: easier to correlate the points of a graph to the flight segments
All CloudAhoy graphs have the same structure. Notice the segment names at the bottom, along the X axis.

Referring to the annotations in the screenshot above:

  1. The flight segments are displayed on the X axis of the graphs. You can see at a glance that the pilot climbed to 4400′, flew  , then descended , etc. The segments are color coded, using the same colors of the corresponding segments in the flight track. If space allows, we display the segment’s name. In the example above, only three segments were wide enough to display their names.
  2. We use shades to separate segments, making it easier to correlate graph values to segments.
  3. The crosshair shows the current time. You can drag it to move the time.
  4. We display the current graph values in a box adjacent to the crosshair. In this case two graphs are shown: the green is the altitude and the blue is the indicated airspeed. Note that we display the current segment’s name above the values. It is useful in cases when the segment’s time is too short for displaying its name on the segment list below.

NEW: multi-value temperature graphs
If you import data from an EFIS such as Garmin Perspective or Garmin 1000, you can now display individual cylinder’s CHT and EGT graphs, or combined CHT / EGT of all cylinders. The screenshot on the right shows the new graph menu items, displayed by clicking or tapping the menu icon  on “Flight Graphs”.

Below is the CHT 1..6 graph from the picture above. It is now easy to correlate temperature changes to the segments of the flight, in this case climb, level and descent.

The CHT and EGT graphs are useful for spotting an abnormal temperature of an individual cylinder, and for debriefing the effects of rapid descents on the engine’s temperatures.

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.

Flights tab: adjustable layout and time display

We released a revised version of the Flights tab, with two important improvements.

The layout of the Flights tab is now adjustable

The Flights tab consists of two parts: the flight list (left) and the selected flight’s details (right). A new handle, on the vertical border between the two parts, allows you to close or open the selected flight’s details. Click or tap the handle to toggle open/close.

This adjustable layout is especially handy on narrow displays such as the iPad when you want to view the Remarks fields of all the flights in full.
Reminder:  you can always search for flights with specific text in the Remarks (as well as search other flight parameters) using  Search on the upper-left.

This functionality is available on the iPad in CloudAhoy app, or in Safari. It is also available on the iPhone in Safari; it is not yet available in the iPhone’s CloudAhoy app. 


Decimal display of air and ground times (in addition to H:M:S)

Useful for logbook entries – the Air and Ground times are now displayed in decimal values as well.