Trying to get DJI to look at it. I know what happened with the battery, but don't know why it went to active track. Tried online chat but aftersales service never available. Thanks all for taking a look.
Mavic Air 2, crashed in water. Flight records here
- Thread starter beeflyin
- Start date
Thanks so much for taking the time to evaluate. In the horizontal distance stream, (highlighted in yellow above), I don't understand the. "horizontal distance to subject too short". I never manually put it into Active Track.
When the MA2 autolands, is the downward sensor still on, to avoid hitting anything below it? Looking to learn as much as I can from this incident, and safety is priority.
The log doesn't reveal why or how a flight mode was initiated ... but it's no doubt that it was in active track mode, the log is clear about that. You had 3 very short instances of active track mode in the beginning of the flight & one longer which lasted until the low battery forced auto landing started.
The active track mode might have confused you ... but it wasn't the reason that you lost your drone, you had it flying to long & didn't handle the auto landing in a correct way.
If your battery is empty no sensor in the world will keep it flying ... this security feature with low battery forced auto landing is height dependent, it will start at a charge percentage that see to that the drone can reach solid ground before the battery is totally dead ... all this to prevent a "dead in the air free fall" situation.
That's correct ... it's a screenshot from a 3D view from Google Earth with your flight path overlayed
Happens to the best of us . Use this as a learning tool and get back flying with your care refresh replacement. Don't leave this dampen your ambition
I think it would be on but it is not an anti collision sensor. It's more a height sensor and suitability or the landing site sensor. Presumably the suitability bit is ultimately over ridden at some point as the battery is drained.
But...... water can confuse the sensor, for future reference low flights over water can be risky and you need to be ready to throttle up if you see it start to descend.
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I have read many post with drones ending up in the water. There are also many reason why it happens. Some on this forum will tell you they never had any problems but for me I will not take a chance and will install the float. I would rather have the security plus the option to land on if I want or have to.
Sorry to hear about this. Hope you are able to retrieve it and get the DJI Refresh to kick in. Admirable what you were doing, and indeed watch out for the gators.
The MA2 downward sensors ARE anti-collision. The MA2 will move around to avoid things it thinks are obstacles. It makes landing on my table top landing zone pretty interesting when the winds are not reasonably still. If not perfectly centered as the drone descends the drone will see the table edge and dart off to avoid it.
Interesting do you see the same behaviour with obstacle avoidance switched off? I ask because the downward looking sensors should still be active. What avoidance mode is the drone in? I believe there are 2, brake or bypass, if bypass what happens if the mode is switched to brake?
The 1.6 manual does say, which is the only reference I can find to downward looking obstacle avoidance
"
Obstacle Avoidance During RTH
.................
When aircraft is flying forward:
..............
3. The aircraft brakes when an obstacle is sensed from below and ascends until no obstacle is sensed before flying forward. "
The 1.6 manual does say, which is the only reference I can find to downward looking obstacle avoidance
"
Obstacle Avoidance During RTH
.................
When aircraft is flying forward:
..............
3. The aircraft brakes when an obstacle is sensed from below and ascends until no obstacle is sensed before flying forward. "
I've considered floats , but what happens if the wind, tide or current take it away from the shore your standing on and out to sea or beyond sight into the middle of a lake ?
How many days have you seen a flat-calm. open-sea around the Irish coast, i.e. calm enough that a drone wouldn't be flipped by wave action.
With regards to fighting wind, I have seen a video of a drone being driven across the surface of water but, thinking on it, I am not sure how because they need to tilt to have horizontal thrust. Maybe, on the floats, it didn't sit level but if that was the case you would only be able to drive it in one direction i.e. forwards or backward or sideways, and to change direction you would have to spin it (perfectly feasible).
With regards to fighting wind, I have seen a video of a drone being driven across the surface of water but, thinking on it, I am not sure how because they need to tilt to have horizontal thrust. Maybe, on the floats, it didn't sit level but if that was the case you would only be able to drive it in one direction i.e. forwards or backward or sideways, and to change direction you would have to spin it (perfectly feasible).
I’ve heard the sensors have trouble with water, or most likely all transparent surfaces. I have a similar issue with the lidar sensor on my ipad pro, when I scan over a window it messes up. It needs a solid constant surface Speed Test to measure accurately
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