Draganfly Draganflyer X4-ES, Руководство пользователя

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hover. When you’re happy the helicopter is behaving properly, you increase throttle to
gain altitude and move pitch even more forward and fly away into the wind.
When you have flown the aircraft into the desired position, slow the aircraft into a good
stable hovering position, double check your aircraft GPS position accuracy and switch
the aircraft into a GPS position hold.
The helicopter will automatically hold its position, altitude and heading. If you wish to
either reposition the aircraft or yaw the aircraft to change heading, you can do this even
when the aircraft is in a GPS position hold. Clearly the primary benefit of the GPS
position hold feature is to dramatically reduce the pilot involvement to maintain a hover
position. This frees the pilot to focus more attention on getting the perfect photo,
searching an area, or conducting the mission.
Forward flight & ballooning:
Because the helicopter is primarily flying in altitude hold mode you will notice a tendency
for the aircraft to balloon (rise or fall) when coming to an abrupt stop. There is nothing
wrong, nothing is broken; its only because altitude is controlled by the barometric sensor
onboard the aircraft.
When the aircraft is traveling fast and comes to an abrupt stop the barometric pressure
in the body of the aircraft changes suddenly, causing the aircraft to either rise or dip.
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Special notice:
The aircraft will rise slightly or drop when making fast or abrupt changes to
speed. You might also see altitude variations hovering in strong winds or even
flying indoors on very windy days due to changes in air pressure.