Kloo Gee
First Officer
Flight distance : 16783757 ft
United States
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El Diablo Posted at 2018-2-21 06:38
This whole ATI - fly way issue is plain stupid and people should stop justifying it. When I flew indoors, there was 0 GPS signal and the Spark obviously was in ATI mode (at least it was written on the screen). The drone never 'flew' away out of a window on its own and every time I released the sticks it just hoovered (very accurately I must admit) in place. Why DJI is not programming the thing to stay in place when connexion is lost I do not understand, or auto RTH... why the drone engage in these weird fly paths is a mistery...
The Spark is advertized as an entry level, family drone for God sake! IMO very few of the owners have experience flying in ATI mode under bridges, it is not written anywhere in the manual that when and if the drone loses conexion it will keep it's previous direction or fly away. Period.
El Diablo,
Your situation inside is much different than outside. Firstly, inside there is no wind. The wind plays a HUGE factor when the aircraft is in ATTI mode. Also, when you were inside, I would guess that the downward visual sensors (VPS) were very likely engaged and able to assist with locating it. Outside in most flying conditions, the aircraft will very likely be too high (DJI documents up to 8 meters) for the visual positioning system to function.
Once you throw in the wind and take away the VPS system, it is a whole different situation when in ATTI mode. If you've ever flown another quad-copter that does NOT have GPS position hold functionality in even a light breeze, you will understand.
The problem for the Spark has really been compass/yaw errors. When those happen, it dumps out of GPS mode into ATTI mode because it doesn't know what to trust in terms of its heading. The Mavic Air has implemented a new "Vision Compass". This quote is from the their marketing materials:
"The Vision Compass will assist the navigation system to estimate flight direction when the compass experiences interference. When only one direction of the front, bottom, or rear vision systems is functioning normally, the aircraft will still position itself "
This obviously doesn't help the Spark that doesn't have this new technology, but its obviously something DJI is looking to resolve with future drones.
The best recommendation I have for Spark flyers is to make sure to get a good compass calibration, then leave it alone and make sure to stay away from objects and locations that would interfere with the compass. I think too many people are doing too many calibrations in locations that aren't great or near objects that affect the compass.
-KlooGee
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