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[photoshop67]

When RTH is activated automatically from the end of a waypoint flight, my drone ( Mini Pro 4) starts descending as it nears the home point. Typically as I recall, it stays at the RTH height until just above the home point and then descends.

This Is a problem because the early descent might cause an accident.

 

[GFields]

Read this article

 

[Droning on and on...]

There's a new RTH option on the M4P called "Optimal". It tries to save power by descending during return, relying on Obstacle Avoidance to keep it out of trouble.

Go into the Safety tab in Settings, and there's switch to set it for Optimal or traditional fixed-height RTH.

I don't trust the OA enough to be comfortable with Optimal, and use the good old square profile RTH myself.

 

[DARKSeifer]

Use the standard RTH and set the altitude higher than the highest obstacle, and you'll never have a single problem.

Anything OA sensor related, except brake mode, will crash your drone sooner or later (into a tree or a cable are the most common scenarios).

 

[Yorkshire_Pud]

Read this article

That's an old article that refers to the Go4 app, the OP is using the Fly app and things are a bit more complicated.

page 50 onwards in

https://dl.djicdn.com/downloads/DJI_Mini_4_Pro/20240627/DJI_Mini_4_Pro_User_Manual_EN.pdf

 

[photoshop67]

That's an old article that refers to the Go4 app, the OP is using the Fly app and things are a bit more complicated.

page 50 onwards in

https://dl.djicdn.com/downloads/DJI_Mini_4_Pro/20240627/DJI_Mini_4_Pro_User_Manual_EN.pdf

Thanks Yorkshire...Looking at the DJI Fly manual....here are two options for RTH. Optimal and Preset. (Safety>Advanced RTH). Preset keeps the drone at the preset level or above. Optimal overrules the RTH Altitude setting in order to deliver the shortest path, and uses obstacle avoidance. If lighting is not sufficient for obstacle avoidance, the drone switches back to the Preset RTH based on your RTH Altitude setting. Page 53. Preset works best for me, as I prefer not to experiment with obstacle avoidance.

 

[Yorkshire_Pud]

Preset works best for me, as I prefer not to experiment with obstacle avoidance.

Ditto, that would be my choice too, so far a dumb RTH and a sensible RTH height have always worked for me, except in one blow away with a P3 and then full elevator in the normal flight mode couldn't bring it home but fortunately the gust died.

 

[Eko]

Use the standard RTH and set the altitude higher than the highest obstacle, and you'll never have a single problem.

Anything OA sensor related, except brake mode, will crash your drone sooner or later (into a tree or a cable are the most common scenarios).

Hello DarkSeifer,

Further to your comment on the first line in the above thread, I would like to ask if your suggestion still applies:

Suppose I am flying at a height of 50 mt (175 feet) and have already adjusted the safe RTH height as 120 mt (400 feet) where this is also the max permitted height. However, there are some buildings around (though seperately located) which are approximately 150mt (500 feet) high. And also suppose I am experiencing a sudden gust at that height, what will be the consequences of my current settings for RTH and OA?

Thanks in advance.