milksteak
lvl.2
Flight distance : 137369 ft
United States
Offline
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I took a screenshot from within the app that mentions no obstacle avoidance over 80m.
RTH Object avoidance description
Obstacle avoidance has a very limited range of like 4-5meters, so it can't fly faster than 2.5meters/s and still have enough space to brake. I think the RTH return speed is preset to fly in excess of this speed limit in order make it home within reasonable time. Why? I don't know. I wish we could have the option to change this.
Allow us to select RTH from options like this:
Automated RTH behavior (low battery RTH, loss of signal, etc.)
A. Stay within obstacle avoidance speed limits (2.5meters/s) at ALL TIMES and land wherever it is if it runs out of battery before returning home.
B. As A, unless RTH approximation against battery life does not allow successful return, then auto switches to mode C until it CAN make it, then auto slows to within obstacle avoidance speed limits.
C. Mixed speed mode. I think this is the current functionality - it flies quickly outside of a certain distance to cover ground without obstacle avoidance, and switches to low speed mode within a certain range. I'm not sure what the purpose do this mode is for, balance of battery life and safety I guess, but I think we can just keep A and B, whic this mixed mode can be full sport mode speed.
D. Hover until out of battery and then land
Manual RTH activation (sudden inability to continue flying, emergency quit, alt+f4)
A. B. and C. as above. These options can be asked each time I slide my thumb across to call for RTH manually.
THEN, the battery graph with the live-adjusting RTH warnings can have two color-coded RTH flags. Green for RTH mode-A and Yellow for mode-B and then Red for mode-C which constantly adjusts itself on the battery graph as I fly, showing me what safety nets I have left in my flight. You can also set <80m it defaults to mode-A or how it currently functions. The above options are for >80m RTH behaviors using the remote.
Basically - what I want to know is if i'm flying in sport mode and I took about 90seconds at a rate of 14meters/s to fly out to 1300m with the remote in sport mode, that for whatever reason it needs to go into RTH; that I can do so within the obstacle avoidance speed limit of 2.5meters/s in under 9 minutes and I want it marked on the battery graph, as silly as it would look seeing a RTH warning at 65-70% battery life. If I wanted to be safe, at that point I could react by bringing it closer to home by around 85%, which should show an adjustment to the on-the-fly RTH warnings and give me additional buffer time. Or I don't have to act upon it at all, but having the info there so that I can make a choice, gives me a sense of security. DJI has the on-the-fly low battery RTH automation already, but the problem is with the lack of obstacle avoidance when it's further out. I echo the reactions that others have. Why? You engineered it, but then you took it away... can't it just fly back slower? Give us the option please.
All that being said, this whole topic is a non-issue for anyone flying using the phone, as the max range is only 80meters give or take a few. I experienced the connection cut out at around 76m in an open-area park. So obstacle avoidance can and will be on at all times based on how RTH is currently working.
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