This is a copy of those sections of the manual freshly downloaded from the Yuneec website, and there is nothing that even remotely suggests doing the calibrations while airborne.
GIMBAL CAMERA CALIBRATION
STEP 1) Place the TYPHOON H on a level and stable surface. Switch on the ST16 Ground Station and the aircraft and wait till the RC and WiFi connected.
STEP 2) Make sure the tilt mode and pan mode all switched upwards, then tap the 'GPS Calibration' button and choose the 'GIMBAL CALIBRATION'.
STEP 3) The Gimbal camera will calibrate itself automatically. Wait the gimbal camera align in 3 axis and stay still, which means the gimbal calibration completes.
NOTICE: The whole calibration will take about 2-3 minutes. During the calibration process, do not touch or move the aircraft.
ACCELEROMETER CALIBRATION
STEP 1) Place the TYPHOON H on a level and stable surface. Switch on the ST16 Ground Station and the aircraft and wait till the RC and WiFi connected.
STEP 2) Make sure the FLIGHT MODE switch is in the middle position. Tap the GPS Calibration button, and choose 'ACCELEROMETER'.
STPE 3) Keep the aircraft stable during the calibration process. During calibration, the main led will blink red, green and blue slowly at first and rapidly afterwards. If calibration succeed. The copter will restart automatically. You will recognize the this when you hear the raising tone.
NOTICE: You must do the accelerometer calibration in no-wind condition.
IMPORTANT NOTE: If calibration has failed, the Main LED Status Indicator will be solid white and you must repeat the calibration process. If the calibration continues to fail, either the site of calibra- tion is unsuitable or the accelerometer is defective. Refer to your Yuneec service center.
I do not where You had download these manual's steps, can You post the link?
Here, I post official link where just now again I dowload the manual, release 1.2, no have any new version found
http://us.yuneec.com/files/downloads/typhoon-h/Typhoon H User Manual-V1.2.pdf
This is the copy and paste of the typhoon manual v1.2
GIMBAL CAMERA CALIBRATION
STEP 1)
Place the TYPHOON H on a level and stable surface. Switch on
the ST16 Ground Station and the aircraft and wait till the RC and WiFi
connected.
STEP 2)
Make sure the tilt mode and pan mode all switched upwards,
then tap the 'GPS Calibration' button and choose the 'GIMBAL
CALIBRATION'.
STEP 3)
The Gimbal camera will calibrate itself automatically. Wait the
gimbal camera align in 3 axis and stay still, which means the gimbal
calibration completes.
NOTICE:
The whole calibration will take about 2-3 minutes. During the
calibration process, do not touch or move the aircraft.
ACCELEROMETER CALIBRATION
STEP 1)
Place the TYPHOON H on a level and stable surface. Switch on
the ST16 Ground Station and the aircraft and wait till the RC and WiFi
connected.
STEP 2)
Make sure the FLIGHT MODE switch is in the middle position.
Tap the GPS Calibration button, and choose 'ACCELEROMETER'.
STPE 3)
Keep the aircraft hovering during the calibration process.
During calibration, the main led will blink red, green and blue slowly
at first and start the motors and take off the aircraft, then the LED will <--------------------------------------------------------------------------------- please read this line
blink rapidly afterwards. When the LED blinks slowly, land and aircraft
and stop the motors. If calibration succeed. The copter will restart
automatically. You will recognize the this when you hear the raising
tone.
NOTICE:
You must do the accelerometer calibration in no-wind condition.
IMPORTANT NOTE:
If calibration has failed, the Main LED Status
Indicator will be solid white and you must repeat the calibration
process. If the calibration continues to fail, either the site of calibra-
tion is unsuitable or the accelerometer is defective. Refer to your
Yuneec service center.