AHRS data from Stratus 2 or 2S, and from EFIS

AHRS_taildraggerWe collaborated with ForeFlight, and as of today we use the measured AHRS data (pitch & roll) as captured by Stratus 2 and 2S.

How do I import my Stratus AHRS data into CloudAhoy?
You need to download and import the KML file from your ForeFlight account on the web. See 2. Import from ForeFlight on the Web.
Note: if you import your ForeFlight flight track directly from ForeFlight’s iPad app, AHRS data will not be included.

How does it affect my debrief?
When you display cockpit view, and when you display glass gauges, the measured pitch & roll are displayed.
The screenshot on the right shows cockpit view of a taxiing taildragger, with 10° pitch.

What if I don’t have an AHRS?
Then we display the computed pitch and roll, like we always did. It’s very close to the measured pitch & roll in most cases.

I imported data from an EFIS (like Garmin G1000). Which pitch & roll is displayed?
CloudAhoy will use the measured AHRS data from the EFIS. We support CSV file import from the following EFIS; click each link for instructions.
Garmin G1000,
Garmin G3X,
GRT Avionics,
Dynon Avionics.

Can I use the computed pitch & roll even if my flight data has AHRS data?
Yes: Account tab > Use AHRS Data if Available > Off.


Import flight data: four new formats

FlightImportWe added four new sources for flight data, which you can import into CloudAhoy using the Flight Import button on the Flights tab:imports
CSV from GRT Aviation
CSV from Dynon Avionics,
KML file format
IGC file format

This extends the list of supported devices and file formats (on the right).

While many pilots use our free CloudAhoy apps on iOS and Android to log data, we see a trend towards importing from other sources. For example, our users log data with ForeFlight+Stratus and import it to CloudAhoy, or import rich avionics data from G1000’s data card.

Importing data, as opposed to using our apps for logging, may have benefits. Please refer to our online help.

Universal Windows – public beta has started

We are excited to start the public beta testing of our new Universal Windows.

To the users who tested the pre-beta versions – a big thank you!


With Universal Windows you can open any number of windows, and display any view in each – 2D or 3D track, cockpit view, video, aviation charts, wind, etc. You can now add the glass gauges to any window, and in any size.

To use the beta software, see this. It’s easy to join the beta program, and if something doesn’t work well it’s easy to revert back to the released software.

Feedback of any kind will be highly appreciated! As usual, send feedback dev@CloudAhoy.com.

Current 3D beta limitations: as of today, the beta software supports 3D only on
– Windows: Firefox browsers
– Mac: Safari and Firefox.
The good news is that we are now in the process of developing full 3D capabilities for every computer/browser configuration. Yes, including the iPad! Coming soon – stay tuned.

Bad Elf Pro+: display barometric pressure profile

BaroPressureOne of the benefits of using Bad Elf Pro+ is that it logs the barometric pressure – useful information especially if your cockpit is unpressurized.

If you log your flight with Bad Elf Pro+ and import the data to CloudAhoy, you can now include the barometric pressure in your flight debriefs.

The CloudAhoy screenshot on the right shows the barometric pressure in inches of mercury. It can also be displayed in millibars.

To display the barometric pressure,

  1. Log the flight with Bad Elf Pro+. It’s a convenient alternative to logging with your iOS or Android app.
  2. After landing, download the flight’s GPX file from the Bad Elf Pro+.
  3. Import the GPX file to CloudAhoy.
  4. Select “Barometric Pressure” from the profile menu; you can select the data in inHg or in millibars.

Visiting Sun ‘n Fun 2015!

SnFHope to see you at Sun ‘n Fun. I am giving three forum talks about CloudAhoy. Please come –

Wednesday 12:00
Practical techniques & overview – room 5

Friday 12:00
Debriefing for instrument Pilots – room 6

Saturday 12:00
Debriefing for safety and self-learning – room 8

To meet up, email chuck@CloudAhoy.com, or call 781-269-1138.

We do not have a booth this year, but I’ll be around and hope to meet many of you.

See you,

Added IAS to CloudAhoy’s Glass Gauges

The airspeed tape of our glass cockpit now include IAS and GS, in addition to TAS.

Less than an hour after we published our previous blog post about the glass cockpit gauges, we started receiving emails requesting a display of the Indicated Airspeed (IAS) in addition to the True Airspeed (TAS). It’s available now. In the example below, IAS is 117 knots, ground speed (GS) is 104 knots and TAS is 120 knots.

If your flight is imported from Garmin G1000 or Garmin G3X, the IAS number is the actual indicated airspeed that was displayed in flight. If you are logging the flight in a different way, we display a computed IAS.



Note: the glass cockpit screenshot above was taken on a Macintosh. See this for its look on Windows and iPad.